@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    /* --- Primitives (Slate & Brand Colors) --- */
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    --slate-950: #020617;

    --brand-blue: #2563eb;
    --brand-violet: #8b5cf6;
    --brand-emerald: #10b981;
    --brand-amber: #f59e0b;
    --brand-red: #ef4444;

    /* --- Semantic Layer (Default: Dark Mode) --- */
    
    /* Backgrounds */
    --page-bg-start: #0f172a; /* Slate 900 */
    --page-bg-end: #020617;   /* Slate 950 */
    --surface-bg: rgba(30, 41, 59, 0.75); /* Glassy Slate 800 */
    --surface-bg-solid: var(--slate-800);
    --surface-hover: var(--slate-700);
    --header-bg: rgba(15, 23, 42, 0.85); /* Glassy Slate 900 */
    --input-bg: var(--slate-800);
    --card-bg: rgba(166, 166, 166, 0.4); /* Slate 700 Glassy para contraste com fundo 800 */

    /* Typography */
    --text-main: var(--slate-50);
    --text-secondary: var(--slate-400);
    --text-muted: var(--slate-400);
    --text-inverse: #ffffff;
    --text-highlight: var(--brand-blue);

    /* Borders */
    --border-color: rgba(255, 255, 255, 0.25);
    --border-subtle: rgba(255, 255, 255, 0.05);
    --border-highlight: var(--brand-blue);

    /* Brand Actions */
    --action-primary: var(--brand-blue);
    --action-secondary: var(--brand-violet);
    --status-success: var(--brand-emerald);
    --status-warning: var(--brand-amber);
    --status-danger: var(--brand-red);

    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --glow-primary: 0 0 20px rgba(59, 130, 246, 0.3);
    --glow-gold: 0 0 20px rgba(245, 158, 11, 0.2);
    --bg-gradient-cta: linear-gradient(135deg, var(--slate-900) 0%, var(--brand-blue) 100%);
    --text-cta: #ffffff;

    /* --- Legacy Compatibility Aliases (Do Not Remove) --- */
    /* Mapeia variáveis antigas para o novo sistema semântico */
    --bg-body: var(--page-bg-end);
    --bg-page: var(--page-bg-end);
    --bg-surface: var(--surface-bg);
    --bg-card: var(--card-bg);
    --text-primary: var(--text-main);
    --accent-primary: var(--action-primary);
    --accent-secondary: var(--action-secondary);
    --hubble-blue: var(--brand-blue);
    --hubble-gold: var(--brand-amber);
    --hubble-red: var(--brand-red);
    --rbr-navy: var(--surface-bg-solid);
    --rbr-red: var(--brand-red);
    --rbr-blue: var(--brand-blue);
    --color-primary: var(--brand-blue);
    --color-success: var(--brand-emerald);
    --text-light: var(--text-main); /* Fallback para templates antigos */
    --color-warning: var(--brand-amber);
    --color-danger: var(--brand-red);
    --color-purple: var(--brand-violet);
    --color-cyan: #06b6d4;
    --color-pink: #ec4899;
}

/* --- Light Mode Overrides --- */
body.light-mode {
    /* Backgrounds */
    --page-bg-start: var(--slate-50);
    --page-bg-end: var(--slate-100);
    --surface-bg: var(--slate-100); /* Cinza claro para contrastar com cards brancos */
    --surface-bg-solid: var(--slate-100);
    --surface-hover: var(--slate-200);
    --header-bg: rgba(255, 255, 255, 0.9);
    --input-bg: var(--slate-50);
    --card-bg: #ffffff;

    /* Typography */
    --text-main: var(--slate-900);
    --text-secondary: var(--slate-700); /* Mais escuro para contraste */
    --text-muted: var(--slate-600);
    --text-inverse: #ffffff;
    
    /* Borders */
    --border-color: var(--slate-300);
    --border-subtle: var(--slate-100);

    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --glow-primary: 0 0 15px rgba(59, 130, 246, 0.15);
    --bg-gradient-cta: linear-gradient(135deg, var(--slate-100) 0%, var(--slate-200) 100%);
    --text-cta: var(--text-main);
    background: radial-gradient(circle at 50% 0%, var(--page-bg-start) 0%, var(--page-bg-end) 100%);
    background-attachment: fixed;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Custom Scrollbar (Space Theme) */
::-webkit-scrollbar {
    width: 14px;
    height: 14px;
}
::-webkit-scrollbar-track {
    background: var(--page-bg-end);
}
::-webkit-scrollbar-thumb {
    background: var(--slate-700);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--brand-blue);
}

/* Firefox Scrollbar Support */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--slate-700) var(--page-bg-end);
}

/* 3D model loading animation (three-loader) */
.three-loader-wrapper { display: inline-block; text-align: center; }
.three-loader {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  color: var(--brand-violet);
  user-select: none;
}
.three-loader .rings { position: relative; width: 56px; height: 56px; transform: translateZ(0); }
.three-loader .ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 3px solid rgba(255,255,255,0.05);
  border-top-color: currentColor;
  box-sizing: border-box;
  animation: three-loader-spin 1.4s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}
.three-loader .ring.r2 { border-top-color: var(--brand-amber); transform: rotate(45deg) scale(0.86); animation-duration: 1.9s; opacity: 0.95; animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1); }
.three-loader .ring.r3 { border-top-color: var(--brand-blue); transform: rotate(90deg) scale(0.72); animation-duration: 2.5s; opacity: 0.9; animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1); }
@keyframes three-loader-spin { to { transform: rotate(360deg); } }
.three-loader-text { color: rgba(255,255,255,0.92); font-weight: 600; }
.three-loader.small .rings { width: 36px; height: 36px; }

body {
    background-color: var(--page-bg-end);
    background-image: 
        radial-gradient(white, rgba(255,255,255,.2) 1px, transparent 3px),
        radial-gradient(white, rgba(255,255,255,.15) 1px, transparent 3px),
        radial-gradient(white, rgba(255,255,255,.1) 2px, transparent 3px),
        radial-gradient(circle at 50% 0%, var(--page-bg-start) 0%, var(--page-bg-end) 100%);
    background-size: 550px 550px, 350px 350px, 250px 250px, 100% 100%;
    background-position: 0 0, 40px 60px, 130px 270px, 0 0;
    background-attachment: fixed;
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    line-height: 1.6;
}

header {
    background-color: var(--bg-header);
    backdrop-filter: blur(16px);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 1000;
}


nav .logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--text-main);
    text-transform: none;
    letter-spacing: -0.02em;
}

.navbar-toggler {
    color: var(--text-primary) !important;
    border: none !important;
    -webkit-tap-highlight-color: transparent; /* Remove highlight cinza no iOS */
}

.navbar-toggler:focus {
    box-shadow: none !important;
    outline: none !important;
}

/* Hamburger Animation */
.hamburger-icon {
    width: 24px;
    height: 18px;
    position: relative;
    transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    transition: .5s ease-in-out;
    -webkit-transition: .5s ease-in-out;
    cursor: pointer;
}

.hamburger-icon span {
    display: block;
    position: absolute;
    height: 2px;
    width: 100%;
    background: var(--text-main);
    border-radius: 2px;
    opacity: 1;
    left: 0;
    transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    transition: .25s ease-in-out;
    -webkit-transition: .25s ease-in-out;
}

.hamburger-icon span:nth-child(1) { top: 0px; }
.hamburger-icon span:nth-child(2) { top: 8px; }
.hamburger-icon span:nth-child(3) { top: 16px; }

/* Estado Aberto (X) */
.navbar-toggler[aria-expanded="true"] .hamburger-icon span:nth-child(1) {
    top: 8px;
    transform: rotate(135deg);
    -webkit-transform: rotate(135deg);
}

.navbar-toggler[aria-expanded="true"] .hamburger-icon span:nth-child(2) {
    opacity: 0;
    left: -60px;
}

.navbar-toggler[aria-expanded="true"] .hamburger-icon span:nth-child(3) {
    top: 8px;
    transform: rotate(-135deg);
    -webkit-transform: rotate(-135deg);
}

nav .nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

nav .nav-links a:hover {
    color: var(--action-primary);
    background: var(--surface-hover);
}

.btn-register {
    background: linear-gradient(135deg, var(--brand-blue), var(--brand-violet));
    padding: 0.5rem 1rem;
    border-radius: 6px;
    color: var(--text-inverse) !important;
    text-decoration: none;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-register:hover {
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
    transform: translateY(-2px);
    color: white;
}

main {
    flex: 1;
    width: 100%;
}

footer {
    background-color: var(--surface-bg);
    color: var(--text-secondary);
    text-align: center;
    padding: 1.5rem;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.breadcrumb-item, .breadcrumb-item a {
    color: var(--text-main);
    text-decoration: none;
}

.breadcrumb-item.active {
    color: var(--action-primary);
    font-weight: 600;
}

/* --- Home Page Styles --- */

.text-highlight {
    color: var(--action-primary);
}

.section-title {
    background: linear-gradient(90deg, var(--text-main), var(--brand-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-transform: uppercase;
    position: relative;
    display: inline-block;
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--action-secondary);
    box-shadow: var(--glow-primary);
    margin: 10px auto 0;
}

.hero-section {
    background: linear-gradient(180deg, transparent 0%, var(--page-bg-end) 100%);
    color: var(--text-main);
    padding: 0;
    height: 600px;
    position: relative;
    overflow: hidden;
    z-index: 0;
}

.hero-bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0.3; /* Transparência para misturar com o fundo azul */
    z-index: -1;
}

/* Correção para o Carrossel */
.carousel-inner {
    position: relative;
    z-index: 1;
}

/* Garante que apenas o item ativo apareça (caso o JS do Bootstrap falhe ou demore) */
.carousel-item {
    display: none;
    transition: transform 0.6s ease-in-out;
}

.carousel-item.active {
    display: block;
}

.stats-bar {
    background-color: var(--surface-bg);
    border-bottom: 1px solid var(--border-color);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    color: var(--action-primary);
    font-weight: bold;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 900;
    line-height: 1;
    text-shadow: 0 0 20px rgba(205, 164, 94, 0.3);
}

.stat-label {
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.feature-card, .course-card {
    
    backdrop-filter: blur(10px);
    background-color: var(--card-bg); /* Explicit background for contrast */
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    will-change: transform; /* Otimização para animações */
}

.course-card { padding: 0; text-align: left; }

.feature-card:hover, .course-card:hover {
    transform: translateY(-8px);
    border-color: rgba(139, 92, 246, 0.5);
    box-shadow: 0 0 25px rgba(37, 99, 235, 0.2), var(--shadow-lg);
}


.feature-icon { 
    font-size: 2rem; 
    margin-bottom: 1.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: rgba(59, 130, 246, 0.15);
    color: var(--action-primary);
    transition: all 0.3s ease;
    animation: floating 6s ease-in-out infinite;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
    background: var(--action-primary);
    color: white;
    box-shadow: var(--glow-primary);
}

.cta-section { padding: 5rem 0; text-align: center; background-color: var(--surface-bg); border-top: 1px solid var(--border-color); }

/* --- Sidebar & Filters --- */
/* --- Classes Utilitárias (Legacy Support) --- */
.bg-rbr-navy { background-color: var(--surface-bg) !important; border: 1px solid var(--border-color); color: var(--text-main) !important; }
.text-rbr-blue { color: var(--action-primary) !important; }
.text-rbr-red { color: var(--action-primary) !important; }
.bg-rbr-red { background-color: var(--action-primary) !important; color: var(--text-inverse) !important; }
.bg-rbr-yellow { background-color: var(--status-warning) !important; color: var(--text-inverse) !important; }

/* Estilo dos Badges de Categoria */
.badge {
    border-radius: 4px;
    padding: 0.5em 1em;
    font-weight: 600;
    color: white; /* Removido !important para permitir classes como text-dark */
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.badge.bg-rbr-navy { background-color: var(--action-primary) !important; }
.badge.bg-rbr-yellow { background-color: var(--status-warning) !important; color: black; } 
.badge.bg-rbr-red { background-color: var(--status-danger) !important; }
.badge.bg-secondary { background-color: #6c757d !important; }

.rating-input .form-check-input:checked + .form-check-label { font-weight: bold; }

.btn-rbr-primary { 
    background: linear-gradient(135deg, var(--brand-blue), var(--brand-violet));
    color: var(--text-inverse); 
    border: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 6px;
    font-weight: 600;
    padding: 0.5rem 1.5rem;
}
.btn-rbr-primary:hover { 
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
    transform: translateY(-2px);
    color: white;
}

.btn-rbr-secondary { 
    background-color: transparent; 
    color: var(--action-secondary); 
    border: 1px solid var(--action-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 6px;
    font-weight: 600;
}
.btn-rbr-secondary:hover { 
    background-color: var(--action-secondary); 
    color: white; 
    box-shadow: var(--glow-primary);
}

.btn-outline-rbr { color: var(--action-secondary); border-color: var(--action-secondary); }
.btn-outline-rbr:hover { background-color: var(--action-secondary); color: white; box-shadow: var(--glow-primary); }

.btn-outline-primary {
    color: var(--text-main);
    border-color: var(--text-main);
}

/* Botões Outline Navy (Correção de Contraste Dark Mode) */
.btn-outline-navy, .btn-outline-rbr-navy {
    color: var(--text-main);
    border: 1px solid var(--text-main);
    background-color: transparent;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.btn-outline-navy:hover, .btn-outline-rbr-navy:hover {
    background-color: var(--text-main);
    color: var(--page-bg-end);
}

/* Override para Light Mode */
body.light-mode .btn-outline-navy, body.light-mode .btn-outline-rbr-navy {
    color: var(--slate-800);
    border-color: var(--slate-800);
}

body.light-mode .btn-outline-primary {
    color: #0d6efd;
    border-color: #0d6efd;
}
body.light-mode .btn-outline-primary:hover {
    color: white;
    border-color: #0d6efd;
}

body.light-mode .btn-outline-navy:hover, body.light-mode .btn-outline-rbr-navy:hover {
    background-color: var(--slate-800);
    color: white;
}

/* Botão Outline Secondary (Adaptação de Contraste) */
.btn-outline-secondary {
    color: var(--text-secondary);
    border-color: var(--text-secondary);
}
.btn-outline-secondary:hover {
    background-color: var(--text-secondary);
    color: var(--bg-body);
}

/* Cores por Categoria */
.cat-pilotagem { background-color: #00529B !important; }
.cat-engenharia { background-color: #4CAF50 !important; }
.cat-estratégia { background-color: #FF5722 !important; }
.cat-mentalidade { background-color: #9C27B0 !important; }
.cat-história { background-color: #795548 !important; }
.cat-gastronomia { background-color: #E91E63 !important; }

/* Dropdown Hubble Style */
.dropdown-menu {
    background-color: var(--surface-bg) !important;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color) !important;
    margin-top: 10px !important;
    box-shadow: var(--shadow-lg);
    color: var(--text-main);
}
.dropdown-item:hover {
    background-color: var(--action-secondary) !important;
    color: white !important;
}

.dropdown-item {
    color: var(--text-main);
}

/* Modal Dark Mode Support */
.modal-content {
    background-color: var(--card-bg);
    backdrop-filter: blur(16px);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}
.modal-header, .modal-footer {
    border-color: var(--border-color);
}

/* Form Controls Dark Mode */
.form-control, .form-select {
    background-color: var(--input-bg) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--text-main) !important;
    border-radius: 4px;
    padding: 0.6rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    background-color: var(--slate-700) !important;
    border-color: var(--action-secondary) !important;
    color: var(--text-main) !important;
    box-shadow: var(--glow-primary);
}

/* Light Mode Override para Inputs */
body.light-mode .form-control,
body.light-mode .form-select {
    background-color: #ffffff !important;
    color: #212529 !important;
}

body.light-mode .form-control:focus,
body.light-mode .form-select:focus {
    background-color: #ffffff !important;
    color: #212529 !important;
    border-color: #86b7fe !important;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25) !important;
}

.form-control::placeholder, .form-select::placeholder {
    color: var(--slate-300);
    opacity: 0.5;
}

body.light-mode .form-control::placeholder,
body.light-mode .form-select::placeholder {
    color: var(--slate-400);
    opacity: 0.5;
}

/* Autofill Fix for Dark Mode */
input:-webkit-autofill,
input:-webkit-autofill:hover, 
input:-webkit-autofill:focus, 
input:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0 30px var(--input-bg) inset !important;
    -webkit-text-fill-color: var(--text-main) !important;
    transition: background-color 5000s ease-in-out 0s;
}

/* Table Dark Mode */
.table {
    color: var(--text-main);
    border-color: var(--border-color);
}
.table thead th {
    border-bottom: 1px solid var(--action-secondary);
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
}
.table-hover tbody tr:hover {
    color: var(--text-main);
    background-color: rgba(255,255,255,0.05);
    transition: background-color 0.2s ease-in-out;
}

/* Nav Highlight Teacher */
.nav-highlight-teacher {
    color: var(--action-primary) !important;
    border: 1px solid var(--action-primary);
    padding: 5px 15px !important;
    border-radius: 20px;
    transition: all 0.3s;
    margin-right: 10px;
}
.nav-highlight-teacher:hover {
    background-color: var(--action-primary);
    color: var(--text-inverse) !important;
    box-shadow: var(--glow-primary);
}

/* Cart Badge */
.cart-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--action-primary);
    color: white;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 50%;
    border: 1px solid var(--page-bg-end);
}

/* Botão de Tema (Dark/Light Mode) */
.theme-toggle-btn {
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle-btn:hover {
    border-color: var(--action-secondary);
    color: var(--action-secondary);
    box-shadow: var(--glow-primary);
    transform: rotate(15deg);
}

/* Utilitários de Contraste */
/* Removido !important para não sobrescrever cores de filhos */
.text-muted {
    color: var(--text-muted);
}
.text-primary { color: var(--brand-blue) !important; }
.text-success { color: var(--brand-emerald) !important; }
.text-warning { color: var(--brand-amber) !important; }
.text-danger { color: var(--brand-red) !important; }

/* Chat Widget Z-Index Fix */
#course-chat-window, #chat-toggle-btn {
    z-index: 9999 !important;
}

/* Lessons Management Styles */
.sortable-lessons-container {
    min-height: 50px;
}

.course-item {
    margin-bottom: 1rem;
}

.orphan-lesson-item {
    background: var(--bg-surface-hover);
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    padding: 0.75rem;
}

.orphan-lesson-item .lesson-draggable-handle {
    padding: 0;
}

/* Animações Globais Suaves */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes floating {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
    100% { transform: translateY(0px); }
}

.animate-fade-up {
    animation: fadeInUp 0.6s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

/* Popover Dark Mode Overrides */
.popover {
    --bs-popover-bg: var(--surface-bg);
    --bs-popover-header-bg: var(--surface-bg);
    --bs-popover-header-color: var(--text-main);
    --bs-popover-body-color: var(--text-secondary);
    --bs-popover-border-color: var(--border-color);
    background-color: var(--surface-bg);
    border-color: var(--border-color);
}
.popover-header {
    background-color: var(--surface-bg);
    color: var(--text-main);
    border-bottom-color: var(--border-color);
}
.popover-body {
    color: var(--text-secondary);
}

/* --- Modern Icon Utilities (Lucide Style) --- */
.icon-box {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    font-size: 1.25rem;
    transition: all 0.3s ease;
}

.icon-box.sm { width: 32px; height: 32px; font-size: 1rem; }
.icon-box.lg { width: 56px; height: 56px; font-size: 1.75rem; }

.icon-box.primary { background: rgba(37, 99, 235, 0.15); color: var(--brand-blue) !important; border: 1px solid rgba(37, 99, 235, 0.2); }
.icon-box.success { background: rgba(16, 185, 129, 0.15); color: var(--brand-emerald) !important; border: 1px solid rgba(16, 185, 129, 0.2); }
.icon-box.warning { background: rgba(245, 158, 11, 0.15); color: var(--brand-amber) !important; border: 1px solid rgba(245, 158, 11, 0.2); }
.icon-box.danger { background: rgba(239, 68, 68, 0.15); color: var(--brand-red) !important; border: 1px solid rgba(239, 68, 68, 0.2); }
.icon-box.purple { background: rgba(139, 92, 246, 0.15); color: var(--brand-violet) !important; border: 1px solid rgba(139, 92, 246, 0.2); }
.icon-box.cyan { background: rgba(6, 182, 212, 0.15); color: var(--color-cyan) !important; border: 1px solid rgba(6, 182, 212, 0.2); }
.icon-box.pink { background: rgba(236, 72, 153, 0.15); color: var(--color-pink) !important; border: 1px solid rgba(236, 72, 153, 0.2); }

/* --- Profile & Achievements --- */
.profile-header-bg {
    background: linear-gradient(135deg, var(--slate-800) 0%, var(--brand-blue) 100%);
    height: 200px;
    border-radius: 0 0 20px 20px;
    margin-bottom: 4rem;
}

.profile-avatar-container {
    margin-top: -100px;
    position: relative;
    display: inline-block;
}

.profile-avatar {
    width: 160px;
    height: 160px;
    border: 6px solid var(--surface-bg);
    border-radius: 50%;
    object-fit: cover;
    background-color: var(--slate-700);
    box-shadow: var(--shadow-lg);
}

.achievement-card {
    transition: transform 0.3s ease;
    height: 100%;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
}

.achievement-card:hover {
    transform: translateY(-5px);
    border-color: var(--action-primary);
}

.achievement-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 1.8rem;
    margin: 0 auto 1rem;
}

.icon-select-option {
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.icon-select-option:hover, .icon-select-option.selected {
    background-color: var(--surface-hover);
    border-color: var(--action-primary);
    transform: scale(1.1);
}

.action-card {
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.action-card:hover {
    transform: translateY(-5px);
    border-color: var(--action-primary);
    box-shadow: var(--shadow-md);
}

.action-card.selected {
    border-color: var(--action-primary);
    background-color: var(--surface-hover);
    box-shadow: 0 0 0 2px var(--action-primary);
    color: var(--text-main);
}

.color-select-option {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 3px solid transparent;
}

.color-select-option:hover {
    transform: scale(1.1);
}

.color-select-option.selected {
    transform: scale(1.1);
    border-color: var(--bg-surface);
    box-shadow: 0 0 0 2px var(--action-primary);
}

/* --- Classroom Layout (Lesson View) --- */
.classroom-wrapper {
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 76px); /* Adjust for header height */
}

@media (min-width: 992px) {
    .classroom-wrapper {
        flex-direction: row;
        height: calc(100vh - 76px);
        min-width: 1100px;
        overflow: hidden;
    }
    
    .classroom-main {
        flex: 1;
        overflow-y: auto;
        display: flex;
        flex-direction: column;
    }
    
    .classroom-sidebar {
        width: 400px;
        background-color: var(--surface-bg);
        border-left: 1px solid var(--border-color);
        overflow-y: auto;
        display: flex;
        flex-direction: column;
        flex-shrink: 0;
    }
}

.classroom-content-area {
    flex: 1;
    padding: 2rem;
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
}

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

.lesson-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
}

.lesson-item:hover {
    background-color: var(--surface-hover);
    color: var(--text-main);
}

.lesson-item.active {
    background-color: rgba(37, 99, 235, 0.1);
    border-left: 4px solid var(--action-primary);
    color: var(--text-main);
}

.lesson-item.completed .status-icon {
    color: var(--brand-emerald);
}

.module-header {
    background-color: var(--bg-body);
    padding: 1rem;
    font-weight: bold;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}

/* Chat Widget in Classroom */
.classroom-chat-container {
    height: 400px;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
}

/* Theater Mode */
body.teatro-mode header,
body.teatro-mode .classroom-sidebar,
body.teatro-mode .lesson-header-nav {
    display: none !important;
}

body.teatro-mode .classroom-wrapper {
    height: 100vh;
}

body.teatro-mode .classroom-content-area {
    max-width: 100%;
    padding: 1rem;
}

/* --- Anti-Piracy & Content Protection --- */
.protected-content {
    -webkit-user-select: none; /* Safari */
    -moz-user-select: none; /* Firefox */
    -ms-user-select: none; /* IE10+/Edge */
    user-select: none; /* Standard */
    -webkit-touch-callout: none;
}

/* --- Scenario Editor (Graph) --- */
#cy-container {
    width: 100%;
    height: 500px;
    background-color: var(--slate-900);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    position: relative;
}

/* --- PDF Flipbook --- */
.flipbook-viewport {
    overflow: hidden;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #2c2c2c;
    padding: 20px;
    border-radius: 8px;
}

.flipbook-container {
    position: relative;
    width: 100%;
    height: 600px; /* Altura fixa ou ajustável via JS */
    max-width: 1000px;
}

.flip-page {
    background-color: white;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
}

.flip-page canvas {
    width: 100% !important;
    height: 100% !important;
    object-fit: contain;
}

/* Scenario Player */
.scenario-node-card {
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 0.5s ease;
}

/* --- Navbar Scroll & Drag --- */
.nav-tabs-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}

.nav-tabs-scroll-container {
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none;  /* IE 10+ */
    flex-grow: 1;
    cursor: grab;
    user-select: none;
    margin: 0 5px;
}

.nav-tabs-scroll-container::-webkit-scrollbar {
    display: none; /* Chrome/Safari */
}

.nav-tabs-scroll-container.active {
    cursor: grabbing;
}

.nav-tabs-scroll-container .nav-tabs {
    flex-wrap: nowrap;
    border-bottom: none;
}

.nav-scroll-btn {
    background: transparent;
    border: none;
    color: #495057;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: opacity 0.2s;
    flex-shrink: 0;
    z-index: 2;
}

.nav-scroll-btn:hover {
    background-color: #e9ecef;
    border-radius: 50%;
}

.nav-scroll-btn.disabled {
    color: var(--text-muted);
    opacity: 0.3;
    cursor: default;
    pointer-events: none;
}

.nav-tabs-scroll-container .nav-link {
    padding-top: 5px !important;
    padding-bottom: 5px !important;
}

/* --- Quick Actions Visibility (Limit to 2 lines) --- */
/* Desktop: 4 items per row -> 2 lines = 8 items max */
@media (min-width: 768px) {
    .quick-action-item:nth-child(n+9) { display: none !important; }
}
/* Mobile: 2 items per row -> 2 lines = 4 items max */
@media (max-width: 767.98px) {
    .quick-action-item:nth-child(n+5) { display: none !important; }
}

/* --- Breadcrumb Visibility Fix --- */
.breadcrumb-item {
    color: var(--text-secondary) !important;
}
.breadcrumb-item a {
    color: var(--text-main) !important;
}
.breadcrumb-item.active {
    color: var(--action-primary) !important;
    font-weight: 600;
}
.breadcrumb-item + .breadcrumb-item::before {
    color: var(--text-muted) !important;
}

/* --- HTMX Loading Indicator --- */
.htmx-indicator {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease-in-out;
}
.htmx-request.htmx-indicator {
    opacity: 1;
    pointer-events: auto;
}