/* ══════════════════════════════════════════════════════════
   EASY TEACH — Design System
   🖌️ Design Agent: Paleta verde escuro, Outfit + Inter,
   fundo escuro premium com glassmorphism.
   ══════════════════════════════════════════════════════════ */

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

/* ── Reset ──────────────────────────────────────────────── */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

ul,
ol {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

button {
    cursor: pointer;
    border: none;
    font-family: inherit;
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
}

/* ── CSS Variables ──────────────────────────────────────── */
:root {
    /* Colors */
    --primary: #0d9b52;
    --primary-dark: #0a7a3f;
    --primary-light: #14cc6b;
    --primary-glow: rgba(13, 155, 82, 0.3);
    --accent: #22d66a;
    --accent-glow: rgba(34, 214, 106, 0.25);

    --bg: #060b14;
    --bg-secondary: #0a1020;
    --surface: #0f1a2e;
    --surface-light: #152040;
    --surface-hover: #1a2850;
    --border: rgba(255, 255, 255, 0.06);
    --border-light: rgba(255, 255, 255, 0.1);

    --text: #e8ecf4;
    --text-secondary: #8a95a8;
    --text-muted: #5a667a;
    --white: #ffffff;
    --black: #000000;

    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px var(--primary-glow);
    --shadow-glow-accent: 0 0 40px var(--accent-glow);

    /* Transitions */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.3s var(--ease);
    --transition-fast: all 0.15s var(--ease);
    --transition-slow: all 0.5s var(--ease);
}

/* ── Utility Classes ────────────────────────────────────── */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section {
    padding: var(--space-24) 0;
    position: relative;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--white), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 640px;
    margin: 0 auto var(--space-12);
}

.glass {
    background: rgba(15, 26, 46, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), transparent);
    opacity: 0;
    transition: var(--transition);
}

.btn:hover::before {
    opacity: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 40px var(--primary-glow), var(--shadow-lg);
}

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

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: 1.15rem;
    border-radius: var(--radius-lg);
}

.btn-outline {
    background: transparent;
    color: var(--primary-light);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--white);
    background: var(--surface-light);
}

.btn-danger {
    background: linear-gradient(135deg, var(--error), #dc2626);
    color: var(--white);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
}

/* ── Cards ──────────────────────────────────────────────── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-light);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* ── Form Elements ──────────────────────────────────────── */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.form-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text);
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

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

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

.form-select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text);
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238a95a8' d='M6 8.825L.35 3.175l.7-.7L6 7.425l4.95-4.95.7.7z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

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

/* ── Badge ──────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background: rgba(34, 197, 94, 0.15);
    color: var(--success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
}

.badge-error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error);
}

.badge-info {
    background: rgba(59, 130, 246, 0.15);
    color: var(--info);
}

/* ── Progress Bar ───────────────────────────────────────── */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--surface-light);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: var(--radius-full);
    transition: width 0.8s var(--ease);
    position: relative;
}

.progress-bar-fill::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: shimmer 2s infinite linear;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }

    100% {
        transform: translateX(100%);
    }
}

/* ── Animations ─────────────────────────────────────────── */
.animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-fade {
    opacity: 0;
    transition: opacity 0.5s var(--ease);
}

.animate-fade.visible {
    opacity: 1;
}

.animate-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

.animate-scale.visible {
    opacity: 1;
    transform: scale(1);
}

.animate-slide-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.animate-slide-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.animate-slide-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.animate-slide-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Staggered animation delays */
.delay-1 {
    transition-delay: 0.1s !important;
}

.delay-2 {
    transition-delay: 0.2s !important;
}

.delay-3 {
    transition-delay: 0.3s !important;
}

.delay-4 {
    transition-delay: 0.4s !important;
}

.delay-5 {
    transition-delay: 0.5s !important;
}

.delay-6 {
    transition-delay: 0.6s !important;
}

/* Pulse animation */
@keyframes pulse {

    0%,
    100% {
        box-shadow: 0 0 0 0 var(--primary-glow);
    }

    50% {
        box-shadow: 0 0 0 15px rgba(13, 155, 82, 0);
    }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Float animation */
@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.float {
    animation: float 3s ease-in-out infinite;
}

/* Glow pulse */
@keyframes glow-pulse {

    0%,
    100% {
        box-shadow: var(--shadow-glow);
    }

    50% {
        box-shadow: var(--shadow-glow-accent);
    }
}

/* Spin */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--surface-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ══════════════════════════════════════════════════════════
   NAVBAR
   ══════════════════════════════════════════════════════════ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-4) 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(6, 11, 20, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: var(--space-3) 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.navbar-logo .logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.navbar-logo span {
    background: linear-gradient(135deg, var(--white), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.navbar-links a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.navbar-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform 0.3s var(--ease);
}

.navbar-links a:hover {
    color: var(--white);
}

.navbar-links a:hover::after {
    transform: scaleX(1);
}

.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    padding: var(--space-2);
}

.navbar-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: var(--transition);
    border-radius: 2px;
}

/* ══════════════════════════════════════════════════════════
   HERO
   ══════════════════════════════════════════════════════════ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 30% 20%, var(--primary-glow) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(34, 214, 106, 0.1) 0%, transparent 40%);
    animation: float 8s ease-in-out infinite;
    pointer-events: none;
}

.hero .container {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(13, 155, 82, 0.1);
    border: 1px solid rgba(13, 155, 82, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--primary-light);
    margin-bottom: var(--space-6);
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 7vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-6);
}

.hero h1 .gradient-text {
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--space-8);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-10);
    margin-top: var(--space-16);
}

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

.hero-stat-number {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-light);
}

.hero-stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: var(--space-1);
}

/* ══════════════════════════════════════════════════════════
   METHOD SECTION
   ══════════════════════════════════════════════════════════ */

.method-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-6);
}

.method-card {
    padding: var(--space-8);
    position: relative;
    overflow: hidden;
}

.method-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.method-card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--space-5);
}

.method-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.method-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ══════════════════════════════════════════════════════════
   AUDIENCE SECTION
   ══════════════════════════════════════════════════════════ */

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-6);
}

.audience-card {
    text-align: center;
    padding: var(--space-8);
}

.audience-card-emoji {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    display: block;
}

.audience-card h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    margin-bottom: var(--space-3);
}

.audience-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ══════════════════════════════════════════════════════════
   MODULES SECTION (Timeline-style)
   ══════════════════════════════════════════════════════════ */

.modules-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.modules-timeline::before {
    content: '';
    position: absolute;
    left: 28px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--accent), var(--primary));
}

.module-item {
    display: flex;
    gap: var(--space-5);
    margin-bottom: var(--space-6);
    align-items: flex-start;
}

.module-marker {
    width: 56px;
    height: 56px;
    min-width: 56px;
    background: var(--surface);
    border: 2px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.module-item:hover .module-marker {
    background: var(--primary);
    box-shadow: var(--shadow-glow);
    transform: scale(1.1);
}

.module-content {
    padding: var(--space-5) var(--space-6);
    flex: 1;
}

.module-content h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

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

.module-tag {
    display: inline-block;
    margin-top: var(--space-2);
    font-size: 0.8rem;
    color: var(--primary-light);
    opacity: 0.7;
}

/* ══════════════════════════════════════════════════════════
   GUARANTEE
   ══════════════════════════════════════════════════════════ */

.guarantee {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    padding: var(--space-12);
}

.guarantee-icon {
    font-size: 4rem;
    margin-bottom: var(--space-6);
    display: block;
}

.guarantee h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.guarantee p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
}

/* ══════════════════════════════════════════════════════════
   PRICING / CHECKOUT
   ══════════════════════════════════════════════════════════ */

.pricing-card {
    max-width: 480px;
    margin: 0 auto;
    text-align: center;
    padding: var(--space-10);
    position: relative;
    overflow: hidden;
    border-color: var(--primary);
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.pricing-popular {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-6);
}

.pricing-price {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--space-2);
}

.pricing-price .currency {
    font-size: 1.5rem;
    vertical-align: top;
    margin-right: 4px;
}

.pricing-price .cents {
    font-size: 1.5rem;
    vertical-align: top;
}

.pricing-original {
    color: var(--text-muted);
    font-size: 1.1rem;
    text-decoration: line-through;
    margin-bottom: var(--space-6);
}

.pricing-features {
    text-align: left;
    margin-bottom: var(--space-8);
}

.pricing-feature {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    color: var(--text-secondary);
}

.pricing-feature::before {
    content: '✓';
    color: var(--accent);
    font-weight: 700;
    font-size: 1.1rem;
}

.pricing-btn {
    width: 100%;
    padding: var(--space-5);
    font-size: 1.2rem;
    animation: glow-pulse 3s infinite;
}

/* ══════════════════════════════════════════════════════════
   FAQ
   ══════════════════════════════════════════════════════════ */

.faq-list {
    max-width: 720px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-5) 0;
    background: none;
    color: var(--text);
    font-size: 1.05rem;
    font-weight: 500;
    text-align: left;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--primary-light);
}

.faq-icon {
    font-size: 1.3rem;
    transition: transform 0.3s var(--ease);
    color: var(--text-muted);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s var(--ease), padding 0.4s var(--ease);
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding-bottom: var(--space-5);
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ══════════════════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════════════════ */

.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: var(--space-10) 0;
    text-align: center;
}

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

/* ══════════════════════════════════════════════════════════
   AUTH PAGE (Login/Register)
   ══════════════════════════════════════════════════════════ */

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    position: relative;
}

.auth-page::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 30%, var(--primary-glow) 0%, transparent 50%);
    pointer-events: none;
}

.auth-card {
    width: 100%;
    max-width: 440px;
    padding: var(--space-10);
    position: relative;
    z-index: 1;
}

.auth-tabs {
    display: flex;
    margin-bottom: var(--space-8);
    border-bottom: 1px solid var(--border);
}

.auth-tab {
    flex: 1;
    padding: var(--space-3) 0;
    background: none;
    color: var(--text-muted);
    font-weight: 600;
    position: relative;
    transition: var(--transition);
}

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

.auth-tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
    animation: fadeIn 0.3s var(--ease);
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-divider {
    text-align: center;
    color: var(--text-muted);
    margin: var(--space-6) 0;
    position: relative;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: var(--border);
}

.auth-divider::before {
    left: 0;
}

.auth-divider::after {
    right: 0;
}

.auth-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--error);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    margin-bottom: var(--space-4);
    display: none;
}

.auth-error.show {
    display: block;
    animation: fadeIn 0.3s var(--ease);
}

/* ══════════════════════════════════════════════════════════
   DASHBOARD (Student Portal)
   ══════════════════════════════════════════════════════════ */

.dashboard {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 320px;
    min-width: 320px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: sticky;
    top: 0;
    overflow-y: auto;
}

.sidebar-header {
    padding: var(--space-5) var(--space-5);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-progress {
    padding: var(--space-5);
    border-bottom: 1px solid var(--border);
}

.sidebar-progress-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-2);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.sidebar-progress-percent {
    font-weight: 600;
    color: var(--primary-light);
}

.sidebar-modules {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-3) 0;
}

.sidebar-module {
    border-bottom: 1px solid var(--border);
}

.sidebar-module-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background: none;
    width: 100%;
    color: var(--text);
    font-weight: 600;
    font-size: 0.95rem;
    text-align: left;
    transition: var(--transition);
}

.sidebar-module-header:hover {
    background: var(--surface);
}

.sidebar-module-icon {
    font-size: 1.2rem;
    min-width: 24px;
}

.sidebar-module-chevron {
    margin-left: auto;
    transition: transform 0.3s var(--ease);
    color: var(--text-muted);
}

.sidebar-module.open .sidebar-module-chevron {
    transform: rotate(90deg);
}

.sidebar-lessons {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s var(--ease);
}

.sidebar-module.open .sidebar-lessons {
    max-height: 500px;
}

.sidebar-lesson {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-5) var(--space-3) var(--space-12);
    width: 100%;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
}

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

.sidebar-lesson.active {
    background: var(--surface-light);
    color: var(--primary-light);
    border-left: 3px solid var(--primary);
}

.sidebar-lesson-check {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    transition: var(--transition);
    min-width: 18px;
}

.sidebar-lesson.completed .sidebar-lesson-check {
    background: var(--success);
    border-color: var(--success);
    color: var(--white);
}

.sidebar-lesson-type {
    font-size: 0.75rem;
    margin-left: auto;
    opacity: 0.5;
}

/* ── Main Content Area ────────────────────────────────────── */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    position: relative;
}

.content-header {
    padding: var(--space-5) var(--space-8);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.content-header h2 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
}

.content-body {
    flex: 1;
    padding: var(--space-8);
    max-width: 960px;
}

.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    /* 16:9 */
    background: var(--black);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--space-6);
}

.video-container iframe,
.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    gap: var(--space-4);
}

.video-placeholder-icon {
    font-size: 3rem;
}

/* ── SUMMARY PANEL (RIGHT) ──────────────────────────────── */
.summary-panel {
    width: 320px;
    min-width: 320px;
    background: rgba(15, 23, 42, 0.95);
    border-left: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    display: none;
    flex-direction: column;
    flex-shrink: 0;
    height: 100vh;
    position: sticky;
    top: 0;
    overflow-y: auto;
}

.summary-panel.show {
    display: flex;
}

.summary-header {
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.summary-header h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
}

.summary-body {
    padding: var(--space-6);
    overflow-y: auto;
    flex: 1;
}

.summary-body h3 {
    color: var(--text);
    margin-top: var(--space-4);
    margin-bottom: var(--space-2);
    font-size: 1.05rem;
}

.summary-body ul,
.summary-body ol {
    margin-left: var(--space-6);
    margin-bottom: var(--space-4);
}

.summary-body li {
    margin-bottom: var(--space-2);
    list-style: disc;
}

.summary-body p {
    margin-bottom: var(--space-4);
}

.summary-body strong {
    color: var(--primary-light);
}

@media (max-width: 1200px) {
    .summary-panel {
        position: fixed;
        right: 0;
        top: 0;
        height: 100vh;
        z-index: 900;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.5);
    }
}

.lesson-actions {
    display: flex;
    gap: var(--space-4);
    align-items: center;
    flex-wrap: wrap;
    margin-top: var(--space-4);
}

.lesson-info {
    margin-top: var(--space-6);
    padding: var(--space-6);
}

/* ── Comments Section ──────────────────────────────────── */
.comments-section {
    margin-top: var(--space-6);
}

.comments-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: var(--space-4) var(--space-5);
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-size: 1.1rem;
    cursor: pointer;
    transition: background 0.2s ease;
}

.comments-toggle:hover {
    background: rgba(255, 255, 255, 0.07);
}

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

.comments-chevron {
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: transform 0.2s ease;
}

.comments-body {
    margin-top: var(--space-4);
}

.comment-form {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
    align-items: flex-end;
}

.comment-input {
    flex: 1;
    resize: vertical;
    min-height: 60px;
    font-size: 0.9rem;
}

.comment-submit-btn {
    white-space: nowrap;
    align-self: flex-end;
    padding: 10px 20px;
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.comment-item {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-4);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    transition: background 0.2s ease;
}

.comment-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.comment-avatar {
    width: 40px;
    height: 40px;
    min-width: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: white;
    text-transform: uppercase;
}

.comment-body {
    flex: 1;
    min-width: 0;
}

.comment-meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-1);
}

.comment-author {
    font-size: 0.9rem;
    color: var(--text-primary);
}

.comment-time {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.comment-delete {
    margin-left: auto;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.75rem;
    opacity: 0;
    transition: opacity 0.2s ease;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.comment-item:hover .comment-delete {
    opacity: 0.6;
}

.comment-delete:hover {
    opacity: 1 !important;
    background: rgba(239, 68, 68, 0.15);
}

.comment-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    word-break: break-word;
}

.comments-empty {
    text-align: center;
    padding: var(--space-8);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.comments-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin-top: var(--space-6);
    padding-top: var(--space-4);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

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

.sidebar-toggle-btn {
    display: none;
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 56px;
    height: 56px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    font-size: 1.3rem;
    z-index: 900;
    box-shadow: var(--shadow-glow);
    align-items: center;
    justify-content: center;
}

/* ══════════════════════════════════════════════════════════
   ADMIN PANEL
   ══════════════════════════════════════════════════════════ */

.admin-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: var(--space-4) 0;
}

.admin-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-tabs {
    display: flex;
    gap: var(--space-2);
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: var(--space-8);
    overflow-x: auto;
}

.admin-tab {
    padding: var(--space-3) var(--space-5);
    background: none;
    color: var(--text-muted);
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.admin-tab:hover {
    color: var(--text);
    background: var(--surface);
}

.admin-tab.active {
    color: var(--primary-light);
    background: rgba(13, 155, 82, 0.1);
}

.admin-panel {
    display: none;
}

.admin-panel.active {
    display: block;
    animation: fadeIn 0.3s var(--ease);
}

.admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-6);
}

.admin-stat-card {
    padding: var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.admin-stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.admin-stat-value {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
}

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

/* ── Admin Table ────────────────────────────────────────── */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--space-6);
}

.admin-table th {
    text-align: left;
    padding: var(--space-3) var(--space-4);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
}

.admin-table td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
}

.admin-table tr:hover td {
    background: var(--surface);
}

/* ── Admin Form ─────────────────────────────────────────── */
.admin-form {
    max-width: 600px;
    padding: var(--space-8);
    margin-bottom: var(--space-6);
}

.admin-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

/* ── Toast / Notification ───────────────────────────────── */
.toast-container {
    position: fixed;
    top: var(--space-6);
    right: var(--space-6);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    min-width: 280px;
    animation: slideInRight 0.3s var(--ease);
    box-shadow: var(--shadow-lg);
}

.toast-success {
    background: rgba(34, 197, 94, 0.15);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: var(--success);
}

.toast-error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--error);
}

.toast-info {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: var(--info);
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast-exit {
    animation: slideOutRight 0.3s var(--ease) forwards;
}

@keyframes slideOutRight {
    to {
        opacity: 0;
        transform: translateX(100px);
    }
}

/* ── Modal ──────────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 5000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
}

.modal-overlay.show {
    display: flex;
    animation: fadeIn 0.2s var(--ease);
}

.modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    max-width: 500px;
    width: 100%;
    animation: scaleIn 0.3s var(--ease);
}

@keyframes scaleIn {
    from {
        transform: scale(0.9);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
}

.modal-header h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    padding: var(--space-2);
    transition: var(--transition);
}

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

.modal-actions {
    display: flex;
    gap: var(--space-3);
    justify-content: flex-end;
    margin-top: var(--space-6);
}

/* ══════════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
    .navbar-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: var(--space-20) var(--space-6);
        gap: var(--space-6);
        transition: right 0.3s var(--ease);
        border-left: 1px solid var(--border);
        z-index: 999;
    }

    .navbar-links.open {
        right: 0;
    }

    .navbar-toggle {
        display: flex;
        z-index: 1001;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-stats {
        gap: var(--space-6);
        flex-wrap: wrap;
    }

    .method-grid {
        grid-template-columns: 1fr;
    }

    .audience-grid {
        grid-template-columns: 1fr;
    }

    .modules-timeline::before {
        left: 20px;
    }

    .module-marker {
        width: 40px;
        height: 40px;
        min-width: 40px;
        font-size: 1rem;
    }

    .pricing-card {
        padding: var(--space-6);
    }

    /* Dashboard responsive */
    .dashboard {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        min-width: unset;
        height: auto;
        max-height: 0;
        overflow: hidden;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 800;
        transition: max-height 0.4s var(--ease);
    }

    .sidebar.open {
        max-height: 100vh;
        overflow-y: auto;
    }

    .sidebar-toggle-btn {
        display: flex;
    }

    .content-body {
        padding: var(--space-4);
    }

    .content-header {
        padding: var(--space-4);
    }

    .admin-form-row {
        grid-template-columns: 1fr;
    }

    .admin-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-4);
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .hero-cta .btn {
        width: 100%;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--space-4);
    }

    .pricing-price {
        font-size: 2.5rem;
    }
}

/* ── Profile Page ──────────────────────────────────────── */
.profile-page {
    min-height: 100vh;
    background: var(--bg-dark);
    padding: var(--space-8) var(--space-4);
    display: flex;
    justify-content: center;
}

.profile-container {
    max-width: 600px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.profile-header {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.profile-back {
    align-self: flex-start;
    font-size: 0.9rem;
}

.profile-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--text-primary);
}

.profile-card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
}

.profile-card-muted {
    background: rgba(255, 255, 255, 0.02);
    padding: var(--space-5);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.profile-card-title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    margin-bottom: var(--space-6);
    color: var(--text-primary);
}

.profile-avatar-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.profile-avatar:hover {
    transform: scale(1.05);
}

.profile-avatar-initials {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    text-transform: uppercase;
}

.profile-avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
}

.profile-avatar-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.65);
    color: white;
    text-align: center;
    padding: 8px 0;
    font-size: 0.75rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.profile-avatar:hover .profile-avatar-overlay {
    opacity: 1;
}

.profile-avatar-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ── Forgot Password (login page) ─────────────────────── */
.forgot-password-link {
    display: block;
    text-align: right;
    margin-top: calc(-1 * var(--space-2));
    margin-bottom: var(--space-4);
    font-size: 0.85rem;
    color: var(--primary-light);
    cursor: pointer;
    transition: color 0.2s ease;
    background: none;
    border: none;
    padding: 0;
}

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

.auth-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: var(--success);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    font-size: 0.9rem;
    display: none;
}

.auth-success.show {
    display: block;
}

/* Profile link in sidebar */
.sidebar-profile-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: background 0.2s ease, color 0.2s ease;
    text-decoration: none;
    margin-bottom: var(--space-2);
}

.sidebar-profile-link:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}

.sidebar-profile-avatar {
    width: 28px;
    height: 28px;
    min-width: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 700;
    color: white;
    overflow: hidden;
}

.sidebar-profile-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}