/* ==========================================================================
   CONFIGURAÇÕES GERAIS E VARIÁVEIS (TEMA ESCURO PADRÃO)
   ========================================================================== */
:root {
    --bg-app: #121214;
    --bg-card: #18181b;
    --bg-card-hover: #202024;
    --bg-input: #121214;
    --border-color: #27272a;
    
    --primary: #F5A623;      /* Amarelo Ouro - Pedreiro Premium */
    --primary-hover: #FFB300;
    --primary-glow: rgba(245, 166, 35, 0.15);
    
    --text-main: #f4f4f5;
    --text-sub: #a1a1aa;
    --text-muted: #71717a;
    
    --success: #10b981;      /* Verde para aulas concluídas */
    --success-glow: rgba(16, 185, 129, 0.15);
    --danger: #ef4444;
    --danger-hover: #dc2626;

    --font-heading: 'Outfit', 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-lg: 12px;
    --radius-md: 8px;
    --radius-sm: 4px;
}

/* Variáveis para Tema Claro (Suporte Opcional) */
[data-theme="light"] {
    --bg-app: #f4f5f6;
    --bg-card: #ffffff;
    --bg-card-hover: #f9fafb;
    --bg-input: #f3f4f6;
    --border-color: #e5e7eb;
    
    --primary: #d97706;      /* Amarelo Ouro mais escuro para contraste */
    --primary-hover: #b45309;
    --primary-glow: rgba(217, 119, 6, 0.15);
    
    --text-main: #18181b;
    --text-sub: #4b5563;
    --text-muted: #9ca3af;
}

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

body {
    background-color: var(--bg-app);
    color: var(--text-main);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Scrollbar Customizado */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-app);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ==========================================================================
   LAYOUT E CONTEINER PRINCIPAL
   ========================================================================== */
.app-container {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* ==========================================================================
   BARRA LATERAL (SIDEBAR)
   ========================================================================== */
.sidebar {
    width: 320px;
    background-color: var(--bg-card);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: sticky;
    top: 0;
    z-index: 90;
    transition: var(--transition-smooth);
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 28px;
    color: var(--primary);
    filter: drop-shadow(0 0 8px var(--primary-glow));
    animation: pulseIcon 4s infinite alternate;
}

@keyframes pulseIcon {
    0% { transform: scale(1); }
    100% { transform: scale(1.05); }
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 18px;
    letter-spacing: 0.5px;
    color: var(--text-main);
}

.logo-subtitle {
    font-size: 11px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Progresso do Usuário */
.progress-container {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(180deg, rgba(24,24,27,0) 0%, rgba(245,166,35,0.02) 100%);
}

.progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    color: var(--text-sub);
}

#progress-percent {
    color: var(--primary);
}

.progress-bar-bg {
    height: 6px;
    background-color: var(--bg-app);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary) 0%, #ffc107 100%);
    border-radius: 10px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px rgba(245, 166, 35, 0.4);
}

.progress-stats {
    font-size: 11px;
    color: var(--text-muted);
}

/* Navegação de Módulos (Menu Sanfona) */
.modules-nav {
    flex: 1;
    overflow-y: auto;
    padding: 16px 12px;
}

.module-wrapper {
    margin-bottom: 8px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    transition: var(--transition-smooth);
}

.module-wrapper:hover {
    border-color: rgba(245, 166, 35, 0.3);
}

.module-header {
    width: 100%;
    display: flex;
    align-items: center;
    padding: 14px 16px;
    background-color: var(--bg-card);
    border: none;
    color: var(--text-main);
    text-align: left;
    cursor: pointer;
    gap: 12px;
    outline: none;
    transition: var(--transition-smooth);
}

.module-thumbnail {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    border: 1px solid var(--border-color);
}

.module-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.module-title {
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 700;
    line-height: 1.3;
}

.module-meta {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 500;
}

.module-chevron {
    font-size: 12px;
    color: var(--text-muted);
    transition: transform 0.3s ease;
}

/* Ao expandir o módulo */
.module-wrapper.expanded .module-chevron {
    transform: rotate(180deg);
    color: var(--primary);
}

.module-wrapper.expanded .module-header {
    background-color: rgba(245, 166, 35, 0.03);
}

/* Lista de Aulas */
.lessons-list {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0, 1, 0, 1);
    background-color: rgba(0, 0, 0, 0.15);
    border-top: 1px solid var(--border-color);
}

.module-wrapper.expanded .lessons-list {
    max-height: 1000px; /* valor alto para permitir expansão */
    transition: max-height 0.4s ease-in-out;
}

.lesson-item {
    display: flex;
    align-items: center;
    padding: 12px 16px 12px 20px;
    gap: 12px;
    cursor: pointer;
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
    transition: var(--transition-smooth);
}

.lesson-item:last-child {
    border-bottom: none;
}

.lesson-item:hover {
    background-color: var(--bg-card-hover);
}

.lesson-item.active {
    background-color: rgba(245, 166, 35, 0.08);
    border-left: 3px solid var(--primary);
    padding-left: 17px;
}

/* Checkbox Customizado */
.lesson-checkbox {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    background-color: transparent;
    flex-shrink: 0;
}

.lesson-checkbox i {
    font-size: 10px;
    color: white;
    opacity: 0;
    transition: var(--transition-smooth);
}

.lesson-item.completed .lesson-checkbox {
    border-color: var(--success);
    background-color: var(--success);
}

.lesson-item.completed .lesson-checkbox i {
    opacity: 1;
}

.lesson-item-title {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-sub);
    flex: 1;
    line-height: 1.4;
    transition: var(--transition-smooth);
}

.lesson-item.completed .lesson-item-title {
    text-decoration: line-through;
    color: var(--text-muted);
}

.lesson-item.active .lesson-item-title {
    color: var(--text-main);
    font-weight: 600;
}

/* Módulo de Redirecionamento (Bônus) */
.module-wrapper.bonus-redirect {
    border-color: rgba(245, 166, 35, 0.4);
    background: linear-gradient(135deg, rgba(24,24,27,1) 0%, rgba(245,166,35,0.06) 100%);
}

.module-wrapper.bonus-redirect:hover {
    border-color: var(--primary);
    box-shadow: 0 0 12px var(--primary-glow);
}

.module-wrapper.bonus-redirect .module-title {
    color: var(--primary);
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
}

.btn-admin-trigger {
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-md);
    background-color: var(--bg-card-hover);
    border: 1px solid var(--border-color);
    color: var(--text-sub);
    font-family: var(--font-body);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition-smooth);
}

.btn-admin-trigger:hover {
    background-color: var(--primary-glow);
    border-color: var(--primary);
    color: var(--primary);
}

/* ==========================================================================
   CONTEÚDO PRINCIPAL (MAIN CONTENT)
   ========================================================================== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow-y: auto;
    padding-bottom: 60px;
}

/* Topbar / Header */
.main-header {
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    background-color: var(--bg-app);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 80;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 20px;
    cursor: pointer;
    padding: 8px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

#breadcrumb-module {
    color: var(--text-muted);
}

#breadcrumb-lesson {
    color: var(--primary);
}

.breadcrumb-separator {
    font-size: 10px;
    color: var(--text-muted);
}

.btn-theme-toggle {
    background: none;
    border: none;
    color: var(--text-sub);
    font-size: 18px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: var(--transition-smooth);
}

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

/* Player de Vídeo */
.player-section {
    padding: 30px 40px 10px 40px;
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
}

.video-wrapper {
    width: 100%;
    aspect-ratio: 16 / 9;
    background-color: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
}

/* Placeholder se vídeo estiver ausente */
.video-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #18181b 0%, #0c0c0e 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    z-index: 5;
    padding: 24px;
}

.placeholder-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 450px;
}

.placeholder-play-icon {
    font-size: 64px;
    color: var(--primary);
    margin-bottom: 20px;
    filter: drop-shadow(0 0 12px var(--primary-glow));
    opacity: 0.8;
}

.placeholder-content h3 {
    font-family: var(--font-heading);
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--text-main);
}

.placeholder-content p {
    font-size: 13px;
    color: var(--text-sub);
    line-height: 1.5;
}

/* Controles do Player */
.player-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    gap: 16px;
}

.btn-nav {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-sub);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-smooth);
}

.btn-nav:hover:not(:disabled) {
    border-color: var(--primary);
    color: var(--primary);
    background-color: rgba(245, 166, 35, 0.03);
}

.btn-nav:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-complete {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-sub);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition-smooth);
}

.btn-complete:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-complete.active {
    background-color: var(--success);
    border-color: var(--success);
    color: #fff;
    box-shadow: 0 4px 12px var(--success-glow);
}

.btn-complete.active:hover {
    filter: brightness(1.1);
}

/* ==========================================================================
   SEÇÃO DE DETALHES DA AULA (ABAS)
   ========================================================================== */
.lesson-details {
    padding: 40px;
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
}

/* Cabeçalho de Abas */
.tabs-header {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    gap: 24px;
    margin-bottom: 30px;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-sub);
    padding: 12px 4px;
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    transition: var(--transition-smooth);
}

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

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

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary);
    box-shadow: 0 -2px 8px var(--primary);
}

/* Painel de Conteúdo de Abas */
.tab-pane {
    display: none;
    animation: fadeIn 0.4s ease;
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.tab-subtitle {
    font-size: 13px;
    color: var(--text-sub);
    margin-top: 4px;
    margin-bottom: 24px;
}

/* Detalhes da Aula (Sobre) */
.lesson-title {
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
    color: var(--text-main);
}

.lesson-description {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.6;
    max-width: 800px;
}

/* Lista de Materiais de Apoio */
.materials-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.material-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition-smooth);
}

.material-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
    background-color: var(--bg-card-hover);
}

.material-icon-box {
    width: 40px;
    height: 40px;
    background-color: rgba(245, 166, 35, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--primary);
}

.material-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.material-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-main);
}

.material-size {
    font-size: 11px;
    color: var(--text-muted);
}

/* ==========================================================================
   SISTEMA DE COMENTÁRIOS / SUPORTE
   ========================================================================== */
.comment-form {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 32px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.form-group label {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-sub);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.form-group input, 
.form-group textarea {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 14px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    outline: none;
    width: 100%;
    transition: var(--transition-smooth);
}

.form-group input:focus, 
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.btn-submit-comment {
    background-color: var(--primary);
    border: none;
    color: #000;
    padding: 12px 24px;
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 700;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-smooth);
}

.btn-submit-comment:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

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

.comment-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    border-left: 4px solid var(--primary);
    animation: fadeIn 0.4s ease;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.comment-meta {
    display: flex;
    align-items: center;
    gap: 10px;
}

.comment-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--bg-card-hover);
    color: var(--primary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 12px;
}

.comment-author {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-main);
}

.comment-badge {
    font-size: 9px;
    font-weight: 700;
    background-color: var(--primary-glow);
    color: var(--primary);
    padding: 2px 6px;
    border-radius: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.comment-date {
    font-size: 11px;
    color: var(--text-muted);
}

.comment-text {
    font-size: 13px;
    color: var(--text-sub);
    line-height: 1.5;
    white-space: pre-wrap;
}

/* Resposta do Suporte */
.comment-reply {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--border-color);
    padding-left: 20px;
    border-left: 2px solid var(--success);
}

.reply-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.reply-author {
    font-size: 12px;
    font-weight: 700;
    color: var(--success);
}

.reply-badge {
    font-size: 9px;
    font-weight: 700;
    background-color: var(--success-glow);
    color: var(--success);
    padding: 1px 6px;
    border-radius: 10px;
    text-transform: uppercase;
}

.reply-text {
    font-size: 13px;
    color: var(--text-sub);
    line-height: 1.5;
}

/* ==========================================================================
   MODAL - GERENCIADOR E CONFIGURAÇÃO ADMIN
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 760px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.6);
    overflow: hidden;
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active .modal-card {
    transform: scale(1);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
}

.btn-close-modal {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-close-modal:hover {
    color: var(--text-main);
}

/* Autenticação Admin */
.admin-auth-panel {
    padding: 30px;
    text-align: center;
}

.admin-auth-panel p {
    font-size: 14px;
    color: var(--text-sub);
    margin-bottom: 24px;
}

.input-password-wrapper {
    position: relative;
    max-width: 320px;
    margin: 0 auto;
}

.input-password-wrapper input {
    padding-right: 46px;
    text-align: center;
    font-size: 16px;
    letter-spacing: 2px;
}

.btn-toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
}

.btn-toggle-password:hover {
    color: var(--text-sub);
}

.auth-actions {
    margin-top: 24px;
}

/* Painel de Edição do Admin */
.admin-edit-panel {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

.admin-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.2);
}

.admin-tab-btn {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-sub);
    padding: 14px;
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-smooth);
    border-bottom: 2px solid transparent;
}

.admin-tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background-color: var(--bg-card);
}

.admin-tab-content {
    display: none;
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

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

.tab-help-text {
    font-size: 12px;
    color: var(--text-sub);
    margin-bottom: 20px;
    line-height: 1.5;
}

.form-help {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Lista de Aulas no Admin */
.admin-lessons-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.admin-module-section {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.admin-module-title-bar {
    padding: 10px 16px;
    background-color: var(--bg-card-hover);
    border-bottom: 1px solid var(--border-color);
    font-weight: 700;
    font-size: 12px;
    color: var(--primary);
    text-transform: uppercase;
}

.admin-module-lessons {
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.admin-lesson-row {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 16px;
    align-items: center;
    padding-bottom: 12px;
    border-bottom: 1px dashed var(--border-color);
}

.admin-lesson-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.admin-lesson-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-sub);
}

.admin-lesson-row input {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    outline: none;
    width: 100%;
}

.admin-lesson-row input:focus {
    border-color: var(--primary);
}

/* Botões do Modal */
.admin-actions {
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(0, 0, 0, 0.2);
}

.admin-actions-left {
    display: flex;
    gap: 10px;
}

.admin-actions-right {
    display: flex;
    gap: 10px;
}

/* Classes Utilitárias */
.btn-primary {
    background-color: var(--primary);
    color: #000;
    border: none;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--text-sub);
    border: 1px solid var(--border-color);
    padding: 10px 18px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

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

.btn-danger-outline {
    background-color: transparent;
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
    padding: 10px 14px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 12px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-danger-outline:hover {
    background-color: rgba(239, 68, 68, 0.05);
    border-color: var(--danger);
}

.btn-info-outline {
    background-color: transparent;
    color: #3b82f6;
    border: 1px solid rgba(59, 130, 246, 0.2);
    padding: 10px 14px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 12px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-info-outline:hover {
    background-color: rgba(59, 130, 246, 0.05);
    border-color: #3b82f6;
}

.d-none {
    display: none !important;
}

/* Mobile Screen Overlay */
.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 85;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.mobile-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* ==========================================================================
   RESPONSIVIDADE (MEDIA QUERIES)
   ========================================================================== */
@media (max-width: 992px) {
    /* Barra Lateral Mobile */
    .sidebar {
        position: fixed;
        left: -320px;
        top: 0;
        height: 100vh;
        box-shadow: 10px 0 30px rgba(0, 0, 0, 0.5);
    }
    
    .sidebar.active {
        left: 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .main-header {
        padding: 0 20px;
    }
    
    .player-section {
        padding: 20px;
    }
    
    .lesson-details {
        padding: 20px;
    }
}

@media (max-width: 576px) {
    .player-controls {
        flex-direction: column-reverse;
        gap: 12px;
    }
    
    .btn-complete {
        width: 100%;
        justify-content: center;
    }
    
    .btn-nav {
        width: 100%;
        justify-content: center;
    }
    
    .tabs-header {
        gap: 12px;
    }
    
    .tab-btn {
        font-size: 12px;
        padding: 10px 2px;
    }
    
    .admin-lesson-row {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .admin-actions {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }
    
    .admin-actions-left,
    .admin-actions-right {
        display: grid;
        grid-template-columns: 1fr 1fr;
        width: 100%;
    }
}

/* ==========================================================================
   ESTILOS ADICIONAIS PARA O GERENCIADOR INTERATIVO (PAINEL DO PROFESSOR)
   ========================================================================== */

/* Seções de Módulo */
.admin-module-details {
    padding: 16px;
    background-color: rgba(245, 166, 35, 0.02);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.admin-input-row {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 12px;
    align-items: center;
}

.admin-input-row label {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-sub);
    text-transform: uppercase;
}

/* Subseção de Materiais */
.admin-section-divider {
    padding: 8px 16px;
    background-color: rgba(0, 0, 0, 0.25);
    font-size: 10px;
    font-weight: 700;
    color: var(--text-sub);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-materials-edit-list {
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    background-color: rgba(0, 0, 0, 0.08);
}

.admin-material-edit-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    gap: 12px;
}

.admin-material-name {
    font-weight: 600;
    color: var(--text-main);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.admin-material-meta-tag {
    color: var(--text-muted);
    font-size: 10px;
}

/* Formulário de Adicionar Material */
.admin-material-add-box {
    padding: 12px 16px;
    background-color: rgba(0, 0, 0, 0.12);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.admin-material-add-inputs {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    gap: 8px;
}

.admin-material-add-inputs input,
.admin-material-add-inputs select {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    outline: none;
    width: 100%;
}

.admin-material-add-inputs input:focus,
.admin-material-add-inputs select:focus {
    border-color: var(--primary);
}

.btn-add-sub {
    background-color: rgba(245, 166, 35, 0.15);
    color: var(--primary);
    border: 1px solid var(--primary);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    align-self: flex-end;
    transition: var(--transition-smooth);
}

.btn-add-sub:hover {
    background-color: var(--primary);
    color: #000;
}

/* Cards das Aulas no Admin */
.admin-lessons-edit-list {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    background-color: rgba(0, 0, 0, 0.05);
}

.admin-lesson-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: relative;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: var(--transition-smooth);
}

.admin-lesson-card:hover {
    border-color: rgba(245, 166, 35, 0.2);
}

.admin-lesson-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.admin-lesson-num {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 12px;
    color: var(--primary);
}

.btn-delete-row {
    background: none;
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--danger);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition-smooth);
}

.btn-delete-row:hover {
    background-color: var(--danger);
    color: white;
    border-color: var(--danger);
}

.admin-lesson-card-fields {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 12px;
}

.admin-field-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.admin-field-group label {
    font-size: 10px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
}

.admin-field-group input,
.admin-field-group textarea {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    outline: none;
    font-family: var(--font-body);
}

.admin-field-group input:focus,
.admin-field-group textarea:focus {
    border-color: var(--primary);
}

/* Botão de Adicionar Aula / Item */
.btn-add-item-dashed {
    background-color: rgba(245, 166, 35, 0.02);
    border: 1px dashed rgba(245, 166, 35, 0.3);
    color: var(--primary);
    padding: 12px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 12px;
    font-weight: 700;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition-smooth);
}

.btn-add-item-dashed:hover {
    background-color: var(--primary-glow);
    border-color: var(--primary);
    transform: translateY(-1px);
}