/* =============================================================================
   SecDay CTF Platform - Estilos
   Inspirado em HTB Labs e CyberDefenders
   ============================================================================= */

/* Reset e Base */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111927;
    --bg-card: #1a2332;
    --bg-card-hover: #1f2b3e;
    --text-primary: #e4e7eb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent-green: #10b981;
    --accent-green-hover: #059669;
    --accent-blue: #3b82f6;
    --accent-yellow: #f59e0b;
    --accent-red: #ef4444;
    --accent-purple: #8b5cf6;
    --border-color: #2d3748;
    --success-bg: #064e3b;
    --error-bg: #7f1d1d;
    --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-mono: 'Fira Code', 'Consolas', monospace;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    background-image:
        linear-gradient(rgba(10, 14, 23, 0.87), rgba(10, 14, 23, 0.87)),
        url('/static/images/03_background.png');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

@media (max-width: 768px) {
    body {
        background-attachment: scroll;
    }
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* =============================================================================
   Header - Redesigned
   ============================================================================= */

.header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
}

/* Logo */

.logo-img {
    height: 60px;
    width: auto;
}

/* Navegação Principal */

.nav-main {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 48px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.2s ease;
    border: none;
    background: transparent;
    cursor: pointer;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
    color: var(--accent-green);
    background-color: rgba(16, 185, 129, 0.1);
}

.nav-icon {
    font-size: 1rem;
    line-height: 1;
}

/* Nav Upgrade Special Style */

.nav-link.nav-upgrade {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(245, 158, 11, 0.05));
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--accent-yellow);
}

.nav-link.nav-upgrade:hover {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.25), rgba(245, 158, 11, 0.1));
    border-color: rgba(245, 158, 11, 0.5);
}

/* Dropdown Menu */

.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
}

.dropdown-arrow {
    transition: transform 0.2s ease;
    opacity: 0.6;
}

.nav-dropdown.open .dropdown-arrow {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 180px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(-10px);
    transition: all 0.2s ease;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

.nav-dropdown.open .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    border-radius: 8px;
    transition: all 0.15s ease;
}

.dropdown-item:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.dropdown-icon {
    font-size: 1rem;
    width: 20px;
    text-align: center;
}

/* Área do Usuário */

.nav-user {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-left: auto;
    padding-left: 24px;
    border-left: 1px solid var(--border-color);
}

.user-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.user-badge:hover {
    opacity: 0.8;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 600;
    color: #fff;
    flex-shrink: 0;
}

.user-details {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* Botão Logout */

/* Responsive */

@media (max-width: 992px) {
    .header-container {
        padding: 0 16px;
    }
    
    .nav-main {
        margin-left: 24px;
        gap: 2px;
    }
    
    .nav-link {
        padding: 8px 12px;
        font-size: 0.85rem;
    }
    
    .nav-link span:not(.nav-icon) {
        display: none;
    }
    
    .nav-icon {
        font-size: 1.1rem;
    }
    
    .nav-user {
        padding-left: 16px;
    }
    
    .user-details {
        display: none;
    }
}

@media (max-width: 576px) {
    .header-container {
        height: 56px;
    }
    
    .logo-img {
        height: 28px;
    }
    
    .nav-main {
        margin-left: 16px;
    }
    
    .nav-link {
        padding: 8px;
    }
    
    .user-avatar {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }
    
    .btn-logout {
        width: 32px;
        height: 32px;
    }
}

/* =============================================================================
   Main Content
   ============================================================================= */

.main {
    flex: 1;
    padding: 40px 0;
}

/* =============================================================================
   Catalog Page
   ============================================================================= */

.page-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

/* Challenge Card */

.challenge-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.challenge-card:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--accent-green);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.challenge-header {
    padding: 16px 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.challenge-body {
    padding: 12px 20px 20px;
    flex: 1;
}

.challenge-name {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.challenge-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.challenge-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.15);
}

/* Difficulty Badge */

.difficulty {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.difficulty-educativo {
    background-color: rgba(99, 179, 237, 0.2);
    color: #63b3ed;
    border: 1px solid #63b3ed;
}

.difficulty-fácil {
    background-color: rgba(16, 185, 129, 0.2);
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
}

.difficulty-médio {
    background-color: rgba(245, 158, 11, 0.2);
    color: var(--accent-yellow);
    border: 1px solid var(--accent-yellow);
}

.difficulty-difícil {
    background-color: rgba(239, 68, 68, 0.2);
    color: var(--accent-red);
    border: 1px solid var(--accent-red);
}

/* =============================================================================
   Buttons
   ============================================================================= */

.btn-primary {
    background-color: var(--accent-green);
    color: #fff;
    width: 100%;
}

.btn-download {
    background-color: var(--accent-blue);
    color: #fff;
}

.btn-download:hover {
    background-color: #2563eb;
}

.btn-hint {
    background-color: transparent;
    color: var(--accent-yellow);
    border: 1px solid var(--accent-yellow);
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-hint:hover {
    background-color: rgba(245, 158, 11, 0.15);
}

.btn-submit {
    background-color: var(--accent-green);
    color: #fff;
    padding: 12px 28px;
}

.btn-submit:hover:not(:disabled) {
    background-color: var(--accent-green-hover);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* =============================================================================
   Challenge Page
   ============================================================================= */

.challenge-page-header {
    margin-bottom: 40px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.back-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    display: inline-block;
    margin-bottom: 16px;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--accent-green);
}

.challenge-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

/* Sections */

.section {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-bottom: 28px;
}

.section-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.section-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

/* Video */

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0;
    overflow: hidden;
    border-radius: var(--radius);
    background-color: var(--bg-primary);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Questions */

.question-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
    transition: border-color 0.3s;
}

.question-card:last-child {
    margin-bottom: 0;
}

.question-card.completed {
    border-color: var(--accent-green);
    background-color: rgba(16, 185, 129, 0.05);
}

.question-header {
    margin-bottom: 12px;
}

.question-number {
    color: var(--accent-purple);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.question-text {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 20px;
    line-height: 1.6;
}

/* Hint */

.hint-area {
    margin-bottom: 20px;
}

.hint-content {
    margin-top: 12px;
    padding: 16px;
    background-color: rgba(245, 158, 11, 0.1);
    border-left: 3px solid var(--accent-yellow);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.hint-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
}

/* Flag Form */

.flag-form {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.flag-input {
    flex: 1;
    padding: 12px 16px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-mono);
    transition: border-color 0.2s;
}

.flag-input:focus {
    outline: none;
    border-color: var(--accent-green);
}

.flag-input::placeholder {
    color: var(--text-muted);
}

.flag-input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Feedback */

.feedback {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-weight: 500;
    font-size: 0.95rem;
}

.feedback-success {
    background-color: var(--success-bg);
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
}

.feedback-error {
    background-color: var(--error-bg);
    color: #fca5a5;
    border: 1px solid var(--accent-red);
}

/* Video Pós-CTF */

.video-pos {
    border: 1px solid var(--accent-purple);
}

/* =============================================================================
   Error Page
   ============================================================================= */

.error-page {
    text-align: center;
    padding: 80px 20px;
}

.error-page h1 {
    font-size: 6rem;
    color: var(--accent-red);
    margin-bottom: 16px;
}

.error-page p {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* =============================================================================
   Footer
   ============================================================================= */

.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 24px 0;
    text-align: center;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.footer a {
    color: var(--accent-green);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* =============================================================================
   Filtros
   ============================================================================= */

.filters-section {
    margin-bottom: 32px;
}

.filters-header {
    display: flex;
    gap: 12px;
    align-items: center;
}

.btn-filter-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 20px;
    position: relative;
}

.filter-badge {
    color: var(--accent-green);
    margin-left: 8px;
}

.btn-clear-filters {
    background: transparent;
    border: 1px solid var(--accent-red);
    color: var(--accent-red);
    padding: 8px 16px;
    font-size: 0.85rem;
}

.filters-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    margin-top: 16px;
}

.filter-group {
    margin-bottom: 20px;
}

.filter-group h4 {
    margin-bottom: 12px;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.filter-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.status-options {
    flex-direction: column;
    gap: 8px;
}

.filter-option {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.filter-option input { display: none; }

.filter-option input:checked + .filter-label {
    color: var(--accent-green);
    font-weight: 600;
}

.filter-label {
    color: var(--text-secondary);
}

.tags-options {
    gap: 8px;
}

.filter-tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.filter-tag input { display: none; }

.filter-tag:hover, .filter-tag.selected {
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.filter-tag input:checked + span {
    color: var(--accent-green);
}

.filter-actions {
    margin-top: 20px;
}

/* Status badges em cards */

.status-badge-card {
    font-size: 1rem;
    margin-right: auto;
}

.no-results {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
    grid-column: 1 / -1;
}

/* =============================================================================
   Abas do Desafio
   ============================================================================= */

.challenge-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0;
}

.tab-btn {
    background: transparent;
    border: none;
    padding: 12px 20px;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
    font-size: 0.95rem;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--accent-green);
    border-bottom-color: var(--accent-green);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* =============================================================================
   Modal
   ============================================================================= */

.modal.show {
    display: flex !important;
}

.modal-note {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 24px;
}

.btn-warning {
    background: linear-gradient(135deg, var(--accent-yellow), #d97706);
    color: #000;
}

.btn-secondary {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

/* =============================================================================
   Write-ups
   ============================================================================= */

.writeups-section {
    background: var(--bg-card);
}

.writeups-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.writeup-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    gap: 16px;
}

.writeup-info h4 {
    margin-bottom: 4px;
    color: var(--text-primary);
}

.writeup-author {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.btn-writeup {
    background: var(--accent-green);
    color: #fff;
    white-space: nowrap;
}

.btn-writeup-locked {
    background: var(--bg-card);
    border: 1px solid var(--accent-yellow);
    color: var(--accent-yellow);
    white-space: nowrap;
}

.writeups-subtitle {
    margin: 24px 0 16px;
    font-size: 1rem;
    color: var(--text-primary);
}

.no-writeups {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
}

/* Video Locked */

.video-locked {
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 60px 20px;
    text-align: center;
}

.locked-content .locked-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 16px;
}

.locked-content h3 {
    margin-bottom: 12px;
    color: var(--text-primary);
}

.locked-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* Blocked Badge */

.blocked-badge {
    background: rgba(239, 68, 68, 0.2);
    color: var(--accent-red);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

/* Submit Write-up */

.submit-section {
    background: var(--bg-card);
}

.submit-description {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.submit-note {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--accent-blue);
    padding: 12px;
    border-radius: var(--radius);
    margin-bottom: 24px;
    font-size: 0.9rem;
    color: var(--accent-blue);
}

.submit-form {
    max-width: 500px;
}

.submission-status {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: var(--radius);
}

.submission-status h4 {
    margin-bottom: 12px;
    color: var(--text-primary);
}

.status-pending { color: var(--accent-yellow); }

.status-approved { color: var(--accent-green); }

.status-rejected { color: var(--accent-red); }

/* Challenge Page Tags */

.challenge-page-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

/* =============================================================================
   Seção de Cenário
   ============================================================================= */

.scenario-section {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
    border-left: 4px solid var(--accent-blue);
}

.scenario-content {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.95rem;
}

.scenario-content strong {
    color: var(--text-primary);
}

/* =============================================================================
   Seção de Máquina Virtual
   ============================================================================= */

.vm-section {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(139, 92, 246, 0.1) 100%);
    border: 1px solid var(--accent-purple);
}

.vm-controls {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.vm-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius);
}

.vm-status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.vm-status-indicator.offline {
    background-color: var(--text-muted);
    animation: none;
}

.vm-status-indicator.online {
    background-color: var(--accent-green);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.vm-status-text {
    font-weight: 500;
    color: var(--text-primary);
}

.vm-info {
    background-color: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.vm-info-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.vm-info-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    min-width: 120px;
}

.vm-info-value {
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-weight: 600;
    background-color: var(--bg-primary);
    padding: 4px 12px;
    border-radius: var(--radius);
}

.vm-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-vm-start {
    background: linear-gradient(135deg, var(--accent-green), #059669);
    color: #fff;
    padding: 12px 24px;
}

.btn-vm-start:hover {
    background: linear-gradient(135deg, #059669, #047857);
}

.btn-vm-stop {
    background: linear-gradient(135deg, var(--accent-red), #dc2626);
    color: #fff;
    padding: 12px 24px;
}

.btn-vm-stop:hover {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
}

.btn-vm-extend {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 12px 24px;
}

.btn-vm-extend:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

/* =============================================================================
   Tags de Recursos
   ============================================================================= */

.challenge-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.tag-video {
    background-color: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

.tag-file {
    background-color: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
}

.tag-vm {
    background-color: rgba(139, 92, 246, 0.15);
    color: #a78bfa;
}

/* Material Badge */

.material-badge {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

.material-badge-small {
    background-color: rgba(59, 130, 246, 0.2);
    color: var(--accent-blue);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-right: auto;
}

/* Completion Section */

.completion-section {
    text-align: center;
}

.completion-message {
    padding: 40px;
}

.completion-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 16px;
}

.completion-message h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.completion-message p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* =============================================================================
   Scoreboard
   ============================================================================= */

.scoreboard-page {
    max-width: 1100px;
    margin: 0 auto;
}

.scoreboard-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 24px;
}

.scoreboard-title h1 {
    font-size: 2rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.scoreboard-title p {
    color: var(--text-secondary);
}

.user-stats-card {
    display: flex;
    gap: 24px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 28px;
}

.stat-item {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-green);
}

/* Sistema de Pontuação */

.scoring-info {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
}

.scoring-info h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.scoring-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
}

.scoring-item {
    text-align: center;
    padding: 16px;
    border-radius: var(--radius);
    background-color: var(--bg-secondary);
}

.scoring-difficulty {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.scoring-points {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.scoring-desc {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.scoring-easy .scoring-difficulty { color: var(--accent-green); }

.scoring-medium .scoring-difficulty { color: var(--accent-yellow); }

.scoring-hard .scoring-difficulty { color: var(--accent-red); }

.scoring-bonus .scoring-difficulty { color: #ef4444; }

.scoring-bonus .scoring-points { color: #ef4444; }

/* Estatísticas Globais */

.global-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 32px;
    padding: 20px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius);
}

.global-stat {
    text-align: center;
}

.global-stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.global-stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Ranking Table */

.ranking-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.ranking-table {
    width: 100%;
    border-collapse: collapse;
}

.ranking-table th,
.ranking-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.ranking-table th {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ranking-table tbody tr:last-child td {
    border-bottom: none;
}

.ranking-table tbody tr:hover {
    background-color: var(--bg-card-hover);
}

.ranking-table tbody tr.current-user {
    background-color: rgba(16, 185, 129, 0.1);
    border-left: 3px solid var(--accent-green);
}

.ranking-table tbody tr.top-three {
    background-color: rgba(245, 158, 11, 0.05);
}

.col-rank {
    width: 60px;
    text-align: center;
}

.col-points {
    width: 120px;
}

.col-solved, .col-fb, .col-nivel {
    width: 100px;
    text-align: center;
}

.rank-medal {
    font-size: 1.5rem;
}

.rank-number {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-muted);
}

.user-info-cell {
    display: flex;
    flex-direction: column;
}

.username {
    font-weight: 600;
    color: var(--text-primary);
}

.username-handle {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.points-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-green);
}

.fb-badge {
    background-color: rgba(239, 68, 68, 0.2);
    color: #ef4444;
    padding: 4px 8px;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
}

.empty-ranking {
    text-align: center;
    padding: 48px !important;
    color: var(--text-muted);
}

/* Mini Stats no Header */

.header-stats {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mini-stats {
    display: flex;
    gap: 16px;
    background-color: var(--bg-secondary);
    padding: 8px 16px;
    border-radius: var(--radius);
}

.mini-stat {
    text-align: center;
}

.mini-stat-value {
    display: block;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-green);
}

.mini-stat-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* Points Badge */

.points-badge {
    background-color: var(--bg-secondary);
    color: var(--accent-green);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.points-info {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-left: auto;
    margin-right: 16px;
}

.challenge-points {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.points-icon {
    font-size: 1rem;
}

.question-points {
    background-color: var(--bg-secondary);
    color: var(--accent-green);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-left: auto;
}

.first-blood-btn {
    background: linear-gradient(135deg, #ef4444, #dc2626) !important;
}

/* Nav Scoreboard */

.nav-scoreboard {
    color: var(--accent-yellow) !important;
    font-weight: 500;
}

/* =============================================================================
   Níveis de Usuário (Gratuito/Pro)
   ============================================================================= */

.user-nivel-badge {
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

.user-nivel-badge.nivel-pro {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
}

.user-nivel-badge.nivel-gratuito {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.nivel-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.nivel-badge.nivel-pro {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
}

.nivel-badge.nivel-gratuito {
    background-color: var(--bg-secondary);
    color: var(--text-muted);
}

.user-nivel {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 10px;
    margin-left: 8px;
}

.user-nivel.nivel-pro {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
}

.user-nivel.nivel-gratuito {
    background-color: var(--bg-primary);
    color: var(--text-muted);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Pro Badge nos Cards */

.pro-badge {
    background: linear-gradient(135deg, #6b7280, #4b5563);
    color: #fff;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-right: auto;
}

.pro-badge.pro-unlocked {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

/* Challenge Card Locked */

.challenge-card.challenge-locked {
    opacity: 0.7;
    position: relative;
}

.challenge-card.challenge-locked::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(0,0,0,0.3) 100%);
    pointer-events: none;
    border-radius: var(--radius-lg);
}

.btn-locked {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    width: 100%;
}

.btn-locked:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--accent-yellow);
    color: var(--accent-yellow);
}

/* Catalog Header */

.catalog-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
}

/* Sections */

.challenges-section {
    margin-bottom: 48px;
}

.section-title-catalog {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.section-count {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.btn-upgrade-small {
    margin-left: auto;
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-upgrade-small:hover {
    background: linear-gradient(135deg, #d97706, #b45309);
}

/* Nav Upgrade */

.nav-upgrade {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff !important;
    padding: 6px 12px !important;
    border-radius: var(--radius);
    font-weight: 600;
}

.nav-upgrade:hover {
    background: linear-gradient(135deg, #d97706, #b45309) !important;
}

.nav-admin {
    color: var(--accent-purple) !important;
}

/* =============================================================================
   Upgrade Page
   ============================================================================= */

.upgrade-page {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px 0;
}

.upgrade-header {
    text-align: center;
    margin-bottom: 48px;
}

.upgrade-header h1 {
    font-size: 2.5rem;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--accent-yellow), #f97316);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.upgrade-header p {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

.upgrade-plans {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.plan-card.plan-pro {
    border-color: var(--accent-yellow);
    background: linear-gradient(180deg, rgba(245, 158, 11, 0.1) 0%, var(--bg-card) 30%);
}

.plan-price .price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.plan-price .period {
    color: var(--text-muted);
}

.feature-included {
    color: var(--text-primary);
}

.feature-excluded {
    color: var(--text-muted);
}

.current-plan {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--bg-secondary);
    color: var(--text-muted);
    border-radius: var(--radius);
    font-weight: 500;
}

.btn-upgrade {
    width: 100%;
    padding: 14px 24px;
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-upgrade:hover {
    background: linear-gradient(135deg, #d97706, #b45309);
    transform: translateY(-2px);
}

.btn-upgrade:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Benefits */

.upgrade-benefits {
    text-align: center;
}

.upgrade-benefits h3 {
    font-size: 1.5rem;
    margin-bottom: 32px;
    color: var(--text-primary);
}

/* Modal */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--bg-card);
    border: 1px solid var(--accent-green);
    border-radius: var(--radius-lg);
    padding: 48px;
    text-align: center;
    max-width: 400px;
}

.modal-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.modal-content h2 {
    font-size: 1.8rem;
    margin-bottom: 12px;
    color: var(--accent-green);
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.modal-subtitle {
    font-size: 0.9rem;
    margin-bottom: 24px !important;
}

/* =============================================================================
   Admin Page
   ============================================================================= */

.admin-page {
    max-width: 1000px;
    margin: 0 auto;
}

.admin-header {
    margin-bottom: 32px;
}

.admin-header h1 {
    font-size: 1.8rem;
    margin-bottom: 8px;
}

.admin-header p {
    color: var(--text-secondary);
}

.admin-table-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

@media (max-width: 768px) {
    .admin-table th,
    .admin-table td {
        padding: 12px 10px;
        font-size: 0.85rem;
    }
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.admin-table th {
    background-color: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-table tr:last-child td {
    border-bottom: none;
}

.admin-table tr:hover {
    background-color: var(--bg-card-hover);
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.85rem;
}

.btn-toggle {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-toggle:hover {
    background-color: var(--accent-purple);
    border-color: var(--accent-purple);
    color: #fff;
}

.text-muted {
    color: var(--text-muted);
}

.auth-info {
    margin-top: 20px;
    padding: 16px;
    background-color: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--accent-blue);
    border-radius: var(--radius);
}

.auth-info-text {
    color: var(--accent-blue);
    font-size: 0.85rem;
    margin: 0;
    text-align: center;
}

/* Resend Email Box */

.resend-box {
    background-color: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--accent-yellow);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 24px;
    text-align: center;
}

.resend-box p {
    color: var(--accent-yellow);
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.btn-resend {
    background-color: var(--accent-yellow);
    color: #000;
    padding: 10px 20px;
    font-weight: 600;
}

.btn-resend:hover {
    background-color: #d97706;
}

.resend-form {
    margin: 0;
}

/* =============================================================================
   Upgrade Page - Pricing
   ============================================================================= */

.pricing-section {
    margin-bottom: 48px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: transform 0.2s, border-color 0.2s;
}

.pricing-card:hover {
    transform: translateY(-4px);
}

.pricing-card.featured {
    border-color: var(--accent-green);
    background: linear-gradient(180deg, var(--bg-card) 0%, rgba(16, 185, 129, 0.1) 100%);
}

.plan-ribbon {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-green);
    color: #000;
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
}

.plan-header {
    text-align: center;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.plan-badge.popular {
    background: var(--accent-blue);
    color: #fff;
}

.plan-badge.best {
    background: var(--accent-green);
    color: #000;
}

.plan-header h2 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.price-old {
    font-size: 1rem;
    color: var(--text-muted);
    text-decoration: line-through;
    display: block;
    width: 100%;
    margin-bottom: 4px;
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.period {
    font-size: 1rem;
    color: var(--text-muted);
}

.savings {
    display: block;
    margin-top: 8px;
    color: var(--accent-green);
    font-weight: 600;
    font-size: 0.9rem;
}

.plan-features ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.plan-features li.included {
    color: var(--text-primary);
}

.plan-features li.not-included {
    color: var(--text-muted);
}

.plan-footer {
    margin-top: 24px;
    text-align: center;
}

.current-plan-badge {
    display: inline-block;
    padding: 12px 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-muted);
    font-weight: 500;
}

.btn-plan {
    display: inline-block;
    width: 100%;
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
    text-align: center;
    transition: all 0.2s;
}

.btn-monthly {
    background: var(--accent-blue);
    color: #fff;
}

.btn-monthly:hover {
    background: #2563eb;
}

.btn-yearly {
    background: var(--accent-green);
    color: #000;
}

.btn-yearly:hover {
    background: #059669;
}

/* Subscriber Section */

.subscriber-section {
    max-width: 600px;
    margin: 0 auto 48px;
}

.subscriber-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
}

.subscriber-card h3 {
    margin-bottom: 12px;
    color: var(--text-primary);
}

.subscriber-card > p {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.subscriber-email {
    background: var(--bg-secondary);
    padding: 12px;
    border-radius: var(--radius);
    margin: 16px 0;
}

.btn-verify {
    background: var(--bg-secondary);
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
    padding: 12px 24px;
}

.btn-verify:hover {
    background: var(--accent-blue);
    color: #fff;
}

.verificar-resultado {
    margin-top: 24px;
    padding: 24px;
    border-radius: var(--radius);
    text-align: center;
}

.resultado-sucesso {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid var(--accent-green);
}

.resultado-sucesso h4 { color: var(--accent-green); }

.resultado-info {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid var(--accent-blue);
}

.resultado-info h4 { color: var(--accent-blue); }

.resultado-erro {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid var(--accent-red);
}

.resultado-erro h4 { color: var(--accent-red); }

.resultado-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 12px;
}

.resultado-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 12px;
}

/* Benefits Section */

.benefits-section {
    max-width: 800px;
    margin: 0 auto 48px;
    text-align: center;
}

.benefits-section h3 {
    margin-bottom: 24px;
    color: var(--text-primary);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.benefit-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px 16px;
    text-align: center;
}

.benefit-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 12px;
}

.benefit-item h4 {
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 1rem;
}

.benefit-item p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0;
}

/* FAQ Section */

.faq-section {
    max-width: 700px;
    margin: 0 auto;
}

.faq-section h3 {
    text-align: center;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
}

.faq-item h4 {
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 1rem;
}

.faq-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
}

/* Filtro de Nível */

.nivel-options {
    flex-direction: row;
    gap: 16px;
}

/* =============================================================================
   Autenticação
   ============================================================================= */

.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
    padding: 40px 20px;
}

.auth-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 420px;
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-logo {
    width: 80px;
    height: auto;
    display: block;
    margin: 0 auto 16px;
}

.auth-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 16px;
}

.auth-header h1 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--text-secondary);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.form-group .optional {
    color: var(--text-muted);
    font-weight: 400;
}

.form-group input {
    padding: 12px 16px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-green);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.auth-footer p {
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--accent-green);
    text-decoration: none;
    font-weight: 500;
}

.auth-info-text a {
    color: var(--accent-green);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Links de autenticação (esqueci senha, etc) */

.auth-links {
    text-align: center;
    margin-top: 16px;
}

.forgot-password-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.forgot-password-link:hover {
    color: var(--accent-green);
    text-decoration: underline;
}

.form-hint {
    display: block;
    margin-top: 6px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Loading states */

.loading-video,
.loading-writeups {
    padding: 40px;
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
}

.no-video {
    padding: 20px;
    text-align: center;
    color: var(--text-muted);
}

/* Writeup locked card */

.writeup-locked-card {
    background: rgba(245, 158, 11, 0.1);
    border: 1px dashed var(--accent-yellow);
}

/* Alertas */

.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.alert-success {
    background-color: var(--success-bg);
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
}

.alert-error {
    background-color: var(--error-bg);
    color: #fca5a5;
    border: 1px solid var(--accent-red);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.15);
    color: var(--accent-yellow);
    border: 1px solid var(--accent-yellow);
}

.alert-info {
    background-color: rgba(59, 130, 246, 0.15);
    color: var(--accent-blue);
    border: 1px solid var(--accent-blue);
}

/* User Menu */

.user-menu {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-name {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.btn-logout {
    color: var(--text-muted);
    text-decoration: none;
    padding: 6px 12px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    transition: all 0.2s;
}

.btn-logout:hover {
    color: var(--accent-red);
    background-color: rgba(239, 68, 68, 0.1);
}

/* =============================================================================
   Progresso
   ============================================================================= */

.progress-container {
    margin-top: 16px;
}

.progress-bar {
    height: 6px;
    background-color: var(--bg-primary);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-green), var(--accent-blue));
    border-radius: 3px;
    transition: width 0.3s ease;
}

.progress-text {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.progress-badge {
    color: var(--text-secondary);
    font-size: 0.9rem;
    background-color: var(--bg-secondary);
    padding: 4px 12px;
    border-radius: 20px;
    margin-left: 12px;
}

/* Challenge Card Completed */

.challenge-card.challenge-completed {
    border-color: var(--accent-green);
}

.challenge-card.challenge-completed .challenge-name {
    color: var(--accent-green);
}

.completed-badge {
    background-color: var(--accent-green);
    color: #fff;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-right: auto;
}

/* Solved Badge */

.solved-badge {
    background-color: var(--accent-green);
    color: #fff;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Resolved Info */

.resolved-info {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--accent-green);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
}

.resolved-info p {
    color: var(--accent-green);
    margin: 0;
    font-weight: 500;
}

/* Flag Revealed (quando pergunta já foi resolvida) */

.flag-revealed {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed rgba(16, 185, 129, 0.3);
}

.flag-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.flag-value {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--accent-green);
    background-color: rgba(16, 185, 129, 0.15);
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid rgba(16, 185, 129, 0.3);
    word-break: break-all;
}

.btn-copy-flag {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 10px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    color: var(--text-secondary);
}

.btn-copy-flag:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.btn-copy-flag.copied {
    background-color: rgba(16, 185, 129, 0.2);
    border-color: var(--accent-green);
    color: var(--accent-green);
}

/* Challenge Meta */

.challenge-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
}

/* =============================================================================
   Responsive
   ============================================================================= */

@media (max-width: 768px) {
    .challenges-grid {
        grid-template-columns: 1fr;
    }

    .flag-form {
        flex-direction: column;
    }

    .btn-submit {
        width: 100%;
    }

    .page-title {
        font-size: 1.8rem;
    }

    .challenge-title {
        font-size: 1.6rem;
    }

    .section {
        padding: 20px;
    }

    /* Ranking — permite scroll horizontal em mobile */
    .ranking-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    /* Global stats — reduz gap e permite wrap */
    .global-stats {
        gap: 24px;
        flex-wrap: wrap;
        justify-content: space-around;
    }
}

@media (max-width: 480px) {
    /* Modal — mobile friendly */
    .modal-content {
        padding: 28px 20px;
        max-width: calc(100% - 32px);
        margin: 0 16px;
    }

    .modal-icon {
        font-size: 2.8rem;
    }

    .modal-content h2 {
        font-size: 1.4rem;
    }

    .modal-actions {
        flex-direction: column;
        gap: 10px;
    }

    .modal-actions .btn {
        width: 100%;
        justify-content: center;
    }

    /* Global stats — empilha verticalmente */
    .global-stats {
        flex-direction: column;
        align-items: center;
        gap: 16px;
        padding: 16px;
    }

    /* Tabela de ranking — reduz padding das células */
    .ranking-table th,
    .ranking-table td {
        padding: 12px 8px;
        font-size: 0.85rem;
    }

    /* Oculta colunas menos essenciais em telas muito pequenas */
    .col-fb,
    .col-nivel {
        display: none;
    }
}

/* =============================================================================
   SEÇÕES COLAPSÁVEIS
   ============================================================================= */

.collapsible-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    cursor: pointer;
    background: var(--bg-card);
    transition: background-color 0.2s;
    user-select: none;
}

.section-header:hover {
    background: var(--bg-card-hover);
}

.section-header .section-title {
    margin: 0;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toggle-icon {
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: transform 0.3s ease;
}

.toggle-icon.rotated {
    transform: rotate(180deg);
}

.section-content {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    transition: max-height 0.3s ease, padding 0.3s ease, opacity 0.3s ease;
    overflow: hidden;
}

.section-content.collapsed {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    opacity: 0;
    border-top: none;
}

/* Contadores nas seções */

.video-count,
.questions-count {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* =============================================================================
   GRID DE VÍDEOS
   ============================================================================= */

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

.video-item {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.video-title {
    padding: 12px 16px;
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-primary);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
}

.video-item .video-wrapper {
    aspect-ratio: 16 / 9;
}

.video-item .video-wrapper iframe {
    width: 100%;
    height: 100%;
}

/* Responsivo para vídeos */

@media (max-width: 900px) {
    .videos-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .videos-grid {
        grid-template-columns: 1fr;
    }
    
    .video-item {
        margin: 0 -10px;
        border-radius: 0;
    }
    
    .section-header {
        padding: 14px 16px;
    }
    
    .section-header .section-title {
        font-size: 1rem;
    }
    
    .section-content {
        padding: 16px;
    }
}

/* =============================================================================
   LABORATÓRIO VIRTUAL - NOVO SISTEMA
   ============================================================================= */

.lab-container {
    min-height: 200px;
}

.lab-state {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Info box inicial */

.lab-info-box {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--accent-blue);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 20px;
}

.lab-info-box p {
    margin: 8px 0;
    color: var(--text-secondary);
}

.lab-notice {
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: var(--radius);
    padding: 10px 14px;
    margin-bottom: 20px;
    font-size: 0.85rem;
    color: var(--accent-yellow);
}

/* Estado: Pendente */

.lab-pending-box {
    text-align: center;
    padding: 40px 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.lab-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-green);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.lab-pending-box h4 {
    color: var(--text-primary);
    margin-bottom: 10px;
}

.lab-pending-box p {
    color: var(--text-secondary);
    margin: 5px 0;
}

.lab-pending-tip {
    font-size: 0.85rem;
    color: var(--text-muted) !important;
    margin-top: 15px !important;
}

/* Estado: Ativo */

.lab-active-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.lab-status-badge {
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

.lab-status-badge.active {
    background: rgba(16, 185, 129, 0.2);
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
}

.lab-timer {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-green);
    padding: 8px 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.lab-timer.timer-warning {
    color: var(--accent-red);
    border-color: var(--accent-red);
    animation: pulse 1s ease-in-out infinite;
}

/* Detalhes do lab */

.lab-details {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.lab-detail-item {
    margin-bottom: 16px;
}

.lab-detail-item:last-child {
    margin-bottom: 0;
}

.lab-detail-item label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.lab-detail-value {
    display: flex;
    align-items: center;
    gap: 10px;
}

.lab-detail-value code {
    font-family: var(--font-mono);
    background: var(--bg-card);
    padding: 8px 12px;
    border-radius: var(--radius);
    color: var(--accent-green);
    flex: 1;
    word-break: break-all;
}

.lab-link {
    color: var(--accent-blue);
    text-decoration: none;
    font-family: var(--font-mono);
    background: var(--bg-card);
    padding: 8px 12px;
    border-radius: var(--radius);
    flex: 1;
    word-break: break-all;
}

.lab-link:hover {
    text-decoration: underline;
}

.btn-copy {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-copy:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

/* Credenciais */

.lab-credentials {
    background: var(--bg-card);
    padding: 12px;
    border-radius: var(--radius);
}

.credential-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.credential-row:last-child {
    margin-bottom: 0;
}

.credential-row span {
    width: 60px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.credential-row code {
    flex: 1;
    background: var(--bg-secondary);
    padding: 6px 10px;
    border-radius: 4px;
    font-family: var(--font-mono);
    color: var(--accent-green);
}

/* Ações do lab */

.lab-actions {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.btn-extend {
    background: var(--accent-blue);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-extend:hover:not(:disabled) {
    background: #2563eb;
}

.btn-extend:disabled {
    background: var(--bg-card);
    color: var(--text-muted);
    cursor: not-allowed;
}

.extend-info {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.btn-danger {
    background: transparent;
    color: var(--accent-red);
    border: 1px solid var(--accent-red);
    padding: 10px 20px;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
    margin-left: auto;
}

.btn-danger:hover {
    background: var(--accent-red);
    color: white;
}

/* Estado: Lab em outro desafio */

.lab-warning-box {
    text-align: center;
    padding: 30px 20px;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--accent-yellow);
    border-radius: var(--radius);
}

.lab-warning-box .warning-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 15px;
}

.lab-warning-box h4 {
    color: var(--accent-yellow);
    margin-bottom: 10px;
}

.lab-warning-box p {
    color: var(--text-secondary);
    margin: 8px 0;
}

.lab-warning-box button {
    margin: 15px 10px 0;
}

/* Estado: Erro */

.lab-error-box {
    text-align: center;
    padding: 30px 20px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--accent-red);
    border-radius: var(--radius);
}

.lab-error-box .error-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 15px;
}

.lab-error-box h4 {
    color: var(--accent-red);
    margin-bottom: 10px;
}

.lab-error-box p {
    color: var(--text-secondary);
    margin: 8px 0 20px;
}

/* Responsivo para lab */

@media (max-width: 600px) {
    .lab-active-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .lab-timer {
        font-size: 1.2rem;
    }
    
    .lab-actions {
        flex-direction: column;
    }
    
    .lab-actions button {
        width: 100%;
    }
    
    .btn-danger {
        margin-left: 0;
    }
    
    .lab-detail-value {
        flex-wrap: wrap;
    }
    
    .lab-detail-value code,
    .lab-link {
        width: 100%;
        flex: unset;
    }
}


.nav-auth {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background: #00cc6a;
}

/* ==========================================
   PÁGINA SOBRE - ESTILOS
   ========================================== */

.sobre-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Hero Section */

.sobre-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 60px 0 80px;
    min-height: 70vh;
}

.hero-badge {
    display: inline-block;
    background: linear-gradient(135deg, rgba(29, 211, 224, 0.15), rgba(29, 211, 224, 0.05));
    border: 1px solid rgba(29, 211, 224, 0.3);
    color: #1dd3e0;
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    color: #fff;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #1dd3e0, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: 32px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-xl {
    padding: 18px 36px;
    font-size: 18px;
}

.btn-ghost {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.8);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-outline {
    background: transparent;
    border: 1px solid rgba(29, 211, 224, 0.5);
    color: #1dd3e0;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-outline:hover {
    background: rgba(29, 211, 224, 0.1);
    border-color: #1dd3e0;
}

.btn-block {
    width: 100%;
    text-align: center;
}

/* Terminal Animation */

.terminal-window {
    background: #1a1a2e;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.terminal-header {
    background: #252542;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dot.red { background: #ff5f57; }

.terminal-dot.yellow { background: #febc2e; }

.terminal-dot.green { background: #28c840; }

.terminal-title {
    margin-left: 12px;
    color: rgba(255, 255, 255, 0.5);
    font-size: 13px;
}

.terminal-body {
    padding: 20px;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 13px;
    line-height: 1.8;
}

.terminal-line {
    opacity: 0;
    animation: fadeInLine 0.5s forwards;
}

.terminal-line .prompt {
    color: #1dd3e0;
}

.terminal-line .command {
    color: #fff;
}

.terminal-line.output {
    color: rgba(255, 255, 255, 0.6);
    padding-left: 16px;
}

.terminal-line .alert {
    color: #f59e0b;
}

.terminal-line .cursor {
    animation: blink 1s infinite;
}

@keyframes fadeInLine {
    to { opacity: 1; }
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* Sections */

.sobre-section {
    padding: 80px 0;
}

.section-header-centered {
    text-align: center;
    margin-bottom: 50px;
}

.section-header-centered h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.6);
    max-width: 600px;
    margin: 0 auto;
}

/* About Grid */

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.about-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
}

.about-card:hover {
    border-color: rgba(29, 211, 224, 0.3);
    transform: translateY(-4px);
}

.about-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.about-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 12px;
}

.about-card p {
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

/* Stats Section */

.stats-section {
    background: linear-gradient(135deg, rgba(29, 211, 224, 0.1), rgba(59, 130, 246, 0.1));
    border-radius: 20px;
    padding: 50px;
    margin: 40px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, #1dd3e0, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin-top: 8px;
    display: block;
}

/* Categories Grid */

.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.category-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    transition: all 0.3s ease;
}

.category-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(29, 211, 224, 0.3);
    transform: translateY(-2px);
}

.category-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 12px;
}

.category-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
}

.category-card p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.5;
}

/* How it Works */

.steps-container {
    max-width: 700px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
    position: relative;
}

.step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 20px;
    top: 50px;
    width: 2px;
    height: calc(100% - 10px);
    background: linear-gradient(180deg, rgba(29, 211, 224, 0.5), rgba(29, 211, 224, 0.1));
}

.step-number {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, #1dd3e0, #3b82f6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    color: #fff;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
}

.step-content p {
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
}

/* Plans */

.plans-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.plan-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 32px 28px;
    position: relative;
    transition: all 0.3s ease;
}

.plan-card:hover {
    transform: translateY(-4px);
}

.plan-card.pro {
    border-color: rgba(29, 211, 224, 0.4);
    background: linear-gradient(135deg, rgba(29, 211, 224, 0.08), rgba(59, 130, 246, 0.05));
}

.plan-card.premium {
    border-color: rgba(245, 158, 11, 0.5);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(239, 68, 68, 0.05));
    transform: scale(1.02);
}

.plan-card.premium:hover {
    transform: scale(1.02) translateY(-4px);
}

.plan-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #1dd3e0, #3b82f6);
    color: #fff;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    white-space: nowrap;
}

.plan-card.free .plan-badge {
    background: rgba(255, 255, 255, 0.1);
}

.plan-card.premium .plan-badge {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
}

.plan-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    margin-top: 16px;
    margin-bottom: 8px;
    text-align: center;
}

.plan-price-container {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.plan-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.plan-price .price-original {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.4);
    text-decoration: line-through;
    margin-right: 8px;
    font-weight: 400;
}

.plan-price-sub {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.plan-features {
    list-style: none;
    padding: 0;
    margin: 0 0 24px 0;
}

.plan-features li {
    padding: 8px 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.plan-features li:last-child {
    border-bottom: none;
}

.plan-features li.disabled {
    color: rgba(255, 255, 255, 0.3);
}

.plan-features li.highlight-feature {
    color: #f59e0b;
    font-weight: 500;
}

.plan-features li .feature-value {
    font-size: 12px;
    opacity: 0.7;
}

.plan-features li.savings {
    color: #10b981;
    font-weight: 600;
    background: rgba(16, 185, 129, 0.1);
    margin: 8px -12px 0;
    padding: 10px 12px;
    border-radius: 8px;
    border-bottom: none;
}

.btn-premium {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
    color: #fff;
    border: none;
    font-weight: 600;
}

.btn-premium:hover {
    background: linear-gradient(135deg, #d97706, #dc2626);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(245, 158, 11, 0.3);
}

.plans-note {
    text-align: center;
    margin-top: 32px;
    padding: 16px 24px;
    background: rgba(29, 211, 224, 0.05);
    border: 1px solid rgba(29, 211, 224, 0.2);
    border-radius: 12px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.plans-note p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin: 0;
}

/* SecDay Section */

.secday-section {
    background: linear-gradient(135deg, rgba(29, 211, 224, 0.05), rgba(59, 130, 246, 0.05));
    border-radius: 24px;
    padding: 60px;
    margin: 40px 0;
}

.secday-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 50px;
    align-items: start;
}

.secday-badge {
    display: inline-block;
    background: rgba(29, 211, 224, 0.1);
    border: 1px solid rgba(29, 211, 224, 0.3);
    color: #1dd3e0;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.secday-info h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
}

.secday-info p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 16px;
}

.secday-links {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 24px;
}

.secday-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.value-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
}

.value-icon {
    font-size: 1.5rem;
    display: block;
    margin-bottom: 8px;
}

.value-card h4 {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 4px;
}

.value-card p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
}

/* CTA Section */

.cta-section {
    text-align: center;
    padding: 80px 40px;
    background: linear-gradient(135deg, rgba(29, 211, 224, 0.15), rgba(59, 130, 246, 0.15));
    border-radius: 24px;
    margin: 60px 0;
}

.cta-content h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 500px;
    margin: 0 auto 32px;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Responsive */

@media (max-width: 1024px) {
    .sobre-hero {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .secday-content {
        grid-template-columns: 1fr;
    }
    
    .plans-grid-3 {
        grid-template-columns: 1fr 1fr;
        max-width: 700px;
    }
    
    .plans-grid-3 .plan-card.premium {
        grid-column: 1 / -1;
        max-width: 350px;
        margin: 0 auto;
        transform: none;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .secday-section {
        padding: 30px 20px;
    }
    
    .secday-values {
        grid-template-columns: 1fr;
    }
    
    .cta-section {
        padding: 50px 20px;
    }
    
    .cta-content h2 {
        font-size: 1.75rem;
    }
    
    .plans-grid-3 {
        grid-template-columns: 1fr;
        max-width: 100%;
    }
    
    .plans-grid-3 .plan-card.premium {
        grid-column: auto;
        max-width: 100%;
        order: -1;
    }
    
    .plan-card {
        padding: 28px 20px;
    }
}

.social-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 20px 0 16px;
    color: var(--text-secondary, #888);
    font-size: 13px;
}

.social-divider::before,
.social-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(255,255,255,0.1);
}

.social-login-btns {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.btn-social {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
    white-space: nowrap;
}

.btn-social:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
    box-shadow: 0 4px 14px rgba(0,0,0,0.25);
    text-decoration: none;
}

.btn-social:active {
    transform: translateY(0);
}

.btn-google {
    background: #fff;
    color: #444;
    border: 1px solid #ddd;
}

.btn-github {
    background: #24292e;
    color: #fff;
    border: none;
}

/* =============================================================================
   Global Badges & Tenant Switcher (extracted from base.html)
   ============================================================================= */

/* ── Badges de nível de acesso (globais) ─────────────────────── */

.access-badge {
        display: inline-flex;
        align-items: center;
        gap: 3px;
        font-size: 0.72rem;
        font-weight: 700;
        padding: 2px 8px;
        border-radius: 20px;
        letter-spacing: 0.03em;
        white-space: nowrap;
      }

.badge-gratuito   { background: rgba(34, 197, 94, 0.08); color: #6ee7a0; border: 1px solid rgba(34, 197, 94, 0.2); }

.badge-pro        { background: rgba(245, 158, 11, 0.08); color: #fcd27a; border: 1px solid rgba(245, 158, 11, 0.2); }

.badge-custom     { background: #1a1f3a; color: #818cf8; border: 1px solid #6366f155; }

.badge-multi      { background: #2a1a3a; color: #c084fc; border: 1px solid #a855f755; }

.badge-locked     { opacity: 0.92; }

.badge-unlocked   { opacity: 1; }

/* quando bloqueado, deixa a cor mais apagada */

.challenge-locked .access-badge.badge-locked { filter: brightness(0.85); }

/* ── Tenant Switcher ────────────────────────────────────────── */

.tenant-switcher { position: relative; }

.tenant-toggle {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 4px 10px;
        border-radius: 8px;
        font-size: 0.82rem;
        cursor: pointer;
        transition: background 0.15s;
      }

.tenant-toggle:hover { background: rgba(255,255,255,0.08); }

.tenant-icon { font-size: 1rem; }

.tenant-name {
        max-width: 120px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
      }

.tenant-menu {
        min-width: 200px;
        right: 0;
        left: auto;
      }

.tenant-form { margin: 0; }

.tenant-item {
        display: flex !important;
        align-items: center;
        gap: 8px;
        width: 100%;
        text-align: left;
        background: none;
        border: none;
        cursor: pointer;
        color: inherit;
        font: inherit;
        padding: 8px 14px;
      }

.tenant-item:hover { background: rgba(255,255,255,0.06); }

.tenant-item.active {
        background: rgba(99, 102, 241, 0.15);
        font-weight: 600;
      }

.tenant-check {
        margin-left: auto;
        color: #818cf8;
        font-weight: 700;
      }

.tenant-indicator {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 0.82rem;
        padding: 4px 10px;
        border-radius: 8px;
        background: rgba(99, 102, 241, 0.1);
        border: 1px solid rgba(99, 102, 241, 0.2);
      }

/* Password Toggle (extracted from login.html inline styles) */

.password-wrapper {
    position: relative;
}

.password-wrapper input {
    padding-right: 40px;
}

.password-toggle {
    position: absolute;
    right: 10px;
    top: 38px;
    cursor: pointer;
}