/* ============================================
   KOREAN SCHOOL — MODERN GLASSMORPHISM CSS
   Dark/Light Mode | Blue Gradient + Yellow
   ============================================ */

/* ============ CSS VARIABLES ============ */
:root {
    /* Blue Gradient */
    --primary-1: #1e3a5f;
    --primary-2: #2563eb;
    --primary-3: #3b82f6;
    --primary-4: #60a5fa;
    --primary-5: #93c5fd;

    /* Yellow Accents */
    --accent-1: #f59e0b;
    --accent-2: #fbbf24;
    --accent-3: #fcd34d;

    /* Status */
    --success: #10b981;
    --error: #ef4444;
    --purple: #8b5cf6;

    /* Gradient */
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #3b82f6 100%);
    --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    --gradient-hero: linear-gradient(135deg, #1e3a5f 0%, #2563eb 50%, #7c3aed 100%);

    /* Typography */
    --font-main: 'Inter', sans-serif;
    --font-korean: 'Noto Sans KR', sans-serif;

    /* Sizing */
    --header-height: 4rem;
    --container-width: 1200px;
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;

    /* Transitions */
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============ DARK THEME (DEFAULT) ============ */
[data-theme="dark"] {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-tertiary: #1f2937;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;

    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --glass-hover: rgba(255, 255, 255, 0.08);

    --header-bg: rgba(10, 14, 26, 0.8);
    --card-glow: 0 0 40px rgba(37, 99, 235, 0.1);

    --input-bg: rgba(255, 255, 255, 0.05);
    --input-border: rgba(255, 255, 255, 0.1);
    --input-focus: rgba(37, 99, 235, 0.3);
}

/* ============ LIGHT THEME ============ */
[data-theme="light"] {
    --bg-primary: #f0f4ff;
    --bg-secondary: #e8edf5;
    --bg-tertiary: #dce3f0;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;

    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.8);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --glass-hover: rgba(255, 255, 255, 0.75);

    --header-bg: rgba(240, 244, 255, 0.85);
    --card-glow: 0 0 40px rgba(37, 99, 235, 0.06);

    --input-bg: rgba(255, 255, 255, 0.7);
    --input-border: rgba(0, 0, 0, 0.1);
    --input-focus: rgba(37, 99, 235, 0.2);
}

/* ============ RESET & BASE ============ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5rem;
}

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition);
}

ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; }

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ============ FLOATING BACKGROUND SHAPES ============ */
.floating-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    animation: floatShape 20s ease-in-out infinite;
}

[data-theme="light"] .shape { opacity: 0.08; }

.shape-1 {
    width: 600px; height: 600px;
    background: var(--primary-2);
    top: -10%; left: -10%;
    animation-delay: 0s;
}
.shape-2 {
    width: 400px; height: 400px;
    background: var(--accent-1);
    top: 40%; right: -5%;
    animation-delay: -5s;
}
.shape-3 {
    width: 500px; height: 500px;
    background: var(--purple);
    bottom: -10%; left: 30%;
    animation-delay: -10s;
}
.shape-4 {
    width: 300px; height: 300px;
    background: var(--primary-4);
    top: 20%; left: 50%;
    animation-delay: -15s;
}
.shape-5 {
    width: 350px; height: 350px;
    background: var(--accent-2);
    bottom: 20%; right: 20%;
    animation-delay: -8s;
}

@keyframes floatShape {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(15px, 15px) scale(1.02); }
}

/* ============ GLASS MORPHISM CLASSES ============ */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    transition: all var(--transition);
}

.glass-card:hover {
    background: var(--glass-hover);
    box-shadow: var(--glass-shadow), var(--card-glow);
    transform: translateY(-2px);
}

.glass-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary-4);
}

/* ============ BUTTONS ============ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}
.btn-primary:hover {
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.5);
    transform: translateY(-2px);
}

.btn-glass {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}
.btn-glass:hover {
    background: var(--glass-hover);
    border-color: var(--primary-3);
}

.btn-login {
    background: var(--gradient-accent);
    color: #0f172a;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}
.btn-login:hover {
    box-shadow: 0 8px 25px rgba(245, 158, 11, 0.5);
    transform: translateY(-2px);
}

.btn-lg { padding: 1rem 2rem; font-size: 1.05rem; }
.btn-full { width: 100%; }

/* ============ HEADER ============ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--header-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: all var(--transition);
}

.header.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.3rem;
    font-weight: 800;
    z-index: 100;
}
/* Logo images for dark/light mode */
.nav__logo img {
    height: 40px;
    max-width: 200px;
    width: auto;
    object-fit: contain;
}

.logo-light {
    display: none;
}

[data-theme="dark"] .logo-light { display: none; }
[data-theme="dark"] .logo-dark { display: inline-block; }
[data-theme="light"] .logo-light { display: inline-block; }
[data-theme="light"] .logo-dark { display: none; }

.nav__list {
    display: flex;
    gap: 0.25rem;
}

.nav__link {
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.nav__link:hover,
.nav__link.active {
    color: var(--text-primary);
    background: var(--glass-bg);
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    z-index: 100;
}

/* Theme Toggle */
.theme-toggle {
    position: relative;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: 1.1rem;
    transition: all var(--transition);
}
.theme-toggle:hover {
    background: var(--glass-hover);
    transform: rotate(20deg);
}

[data-theme="dark"] #theme-icon-light { display: none; }
[data-theme="dark"] #theme-icon-dark { display: block; }
[data-theme="light"] #theme-icon-light { display: block; }
[data-theme="light"] #theme-icon-dark { display: none; }

.nav__toggle,
.nav__close {
    display: none;
    font-size: 1.3rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* ============ MODAL ============ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}
.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    width: 90%;
    max-width: 420px;
    padding: 2.5rem;
    position: relative;
    transform: translateY(20px) scale(0.95);
    transition: transform var(--transition);
}
.modal-overlay.active .modal {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--text-secondary);
    transition: all var(--transition);
}
.modal-close:hover { background: var(--glass-bg); color: var(--text-primary); }

.modal-header {
    text-align: center;
    margin-bottom: 2rem;
}
.modal-icon { font-size: 2.5rem; display: block; margin-bottom: 0.75rem; }
.modal-header h2 { font-size: 1.5rem; margin-bottom: 0.25rem; }
.modal-header p { color: var(--text-secondary); font-size: 0.9rem; }

.modal-form { display: flex; flex-direction: column; gap: 1rem; }

.modal-footer-text {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}
.modal-footer-text a { color: var(--primary-3); font-weight: 600; }
.modal-footer-text a:hover { text-decoration: underline; }

/* ============ INPUT GROUPS ============ */
.input-group {
    position: relative;
    display: flex;
    align-items: center;
}
.input-group i {
    position: absolute;
    left: 1rem;
    color: var(--text-tertiary);
    font-size: 0.9rem;
    pointer-events: none;
    z-index: 1;
}
.input-group input,
.input-group select,
.input-group textarea {
    width: 100%;
    padding: 0.9rem 1rem 0.9rem 2.75rem;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    outline: none;
    transition: all var(--transition);
}
.input-group input::placeholder,
.input-group textarea::placeholder { color: var(--text-tertiary); }

/* Browser autofill override */
.input-group input:-webkit-autofill,
.input-group input:-webkit-autofill:hover,
.input-group input:-webkit-autofill:focus {
    -webkit-box-shadow: 0 0 0 1000px var(--input-bg) inset !important;
    -webkit-text-fill-color: var(--text-primary) !important;
    border-color: var(--input-border);
    transition: background-color 5000s ease-in-out 0s;
}

.input-group select { cursor: pointer; appearance: none; }
.input-group select option {
    background: var(--card-bg, #1a1a2e);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    padding: 0.5rem;
}

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

.input-group textarea { resize: vertical; min-height: 80px; }
.input-group:has(textarea) i { top: 1rem; }

.input-prefix {
    position: absolute;
    left: 2.75rem;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
    z-index: 1;
    pointer-events: none;
}
.input-group:has(.input-prefix) input {
    padding-left: 5.2rem;
}

/* ============ HERO ============ */
.hero {
    position: relative;
    display: flex;
    align-items: center;
    padding-top: calc(var(--header-height) + 10rem);
    padding-bottom: 3rem;
    z-index: 1;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero__badge {
    margin-bottom: 1.5rem;
    color: var(--accent-2);
}
.hero__badge i { color: var(--accent-1); }

.hero__title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
    max-width: 520px;
}

.hero__buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.hero__stats {
    display: flex;
    align-items: center;
    gap: 2rem;
}
.stat-item { text-align: center; }
.stat-number {
    font-size: 2rem;
    font-weight: 900;
    color: var(--text-primary);
    display: inline;
}
.stat-plus {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-1);
}
.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.15rem;
}
.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--glass-border);
}

/* Hero Image / Visual */
.hero__image {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero__image-wrapper {
    width: 400px;
    height: 400px;
    padding: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-visual {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-circle {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.2;
    animation: pulse 3s ease-in-out infinite;
}

.hero-icon-main {
    position: absolute;
    font-size: 5rem;
    animation: bounceGentle 3s ease-in-out infinite;
}

.hangul-float {
    position: absolute;
    font-family: var(--font-korean);
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary-4);
    opacity: 0.6;
    animation: floatHangul 4s ease-in-out infinite;
    z-index: 1;
}
.hangul-1 { top: 15%; left: 15%; animation-delay: 0s; }
.hangul-2 { top: 10%; right: 20%; animation-delay: -1.3s; }
.hangul-3 { bottom: 20%; left: 25%; animation-delay: -2.6s; color: var(--accent-2); }

@keyframes floatHangul {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(5deg); }
}

@keyframes bounceGentle {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.2; }
    50% { transform: scale(1.1); opacity: 0.3; }
}

/* Floating Cards */
.hero__floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    animation: floatCard 5s ease-in-out infinite;
}
.hero__floating-card i {
    font-size: 1.5rem;
    color: var(--primary-3);
}
.hero__floating-card strong { display: block; font-size: 0.9rem; }
.hero__floating-card small { color: var(--text-secondary); font-size: 0.75rem; }

.card-top { top: 5%; right: -10%; animation-delay: 0s; }
.card-bottom { bottom: 10%; left: -10%; animation-delay: -2.5s; }

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* ============ SECTIONS COMMON ============ */
.section {
    position: relative;
    padding: 6rem 0;
    z-index: 1;
}

.section__header {
    text-align: center;
    margin-bottom: 4rem;
}

.section__badge {
    margin-bottom: 1rem;
}
.section__badge i { color: var(--accent-1); }

.section__title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-top: 1rem;
    margin-bottom: 0.75rem;
}

.section__subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ============ RESULTS ============ */
.results__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.result-card {
    padding: 2rem;
    text-align: center;
}

.result-card__icon {
    width: 4rem;
    height: 4rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 1.25rem;
    background: rgba(37, 99, 235, 0.15);
    color: var(--primary-3);
}
.result-card__icon.icon-yellow { background: rgba(245, 158, 11, 0.15); color: var(--accent-1); }
.result-card__icon.icon-green { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.result-card__icon.icon-purple { background: rgba(139, 92, 246, 0.15); color: var(--purple); }

.result-card__number {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.result-card__title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.result-card__desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.result-card__bar {
    width: 100%;
    height: 4px;
    background: var(--glass-bg);
    border-radius: 50px;
    overflow: hidden;
}
.bar-fill {
    height: 100%;
    border-radius: 50px;
    background: var(--gradient-primary);
    width: 0;
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.bar-fill.bar-yellow { background: var(--gradient-accent); }
.bar-fill.bar-green { background: linear-gradient(135deg, #10b981, #34d399); }
.bar-fill.bar-purple { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }

.bar-fill.animated { width: var(--target-width, 0); }

/* ============ TOPIK RESULTS ============ */
.topik-carousel {
    position: relative;
    overflow: hidden;
    max-width: 1500px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.topik-carousel__track {
    display: flex;
    gap: 1rem;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.topik-card {
    overflow: hidden;
    padding: 0;
    min-width: calc((100% - 4rem) / 5);
    max-width: calc((100% - 4rem) / 5);
    flex-shrink: 0;
}

.topik-carousel__controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.topik-carousel__btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--glass-bg);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.topik-carousel__btn:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.topik-card__image {
    aspect-ratio: 5 / 6;
    overflow: hidden;
    background: var(--glass-bg);
}

.topik-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.topik-card:hover .topik-card__image img {
    transform: scale(1.05);
}

.topik-card__info {
    padding: 0.75rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.topik-card__info strong {
    font-size: 0.875rem;
    font-weight: 700;
}

.topik-card__info span {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ============ COURSES ============ */
.courses__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.course-card {
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.course-card--popular {
    border-color: var(--primary-3);
    box-shadow: var(--glass-shadow), 0 0 40px rgba(37, 99, 235, 0.15);
}

.popular-badge {
    position: absolute;
    top: 1rem;
    right: -2rem;
    background: var(--gradient-primary);
    color: #fff;
    padding: 0.35rem 2.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    transform: rotate(35deg);
}

.course-card__level {
    display: inline-block;
    padding: 0.3rem 0.9rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}
.level-beginner { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.level-intermediate { background: rgba(37, 99, 235, 0.15); color: var(--primary-3); }
.level-advanced { background: rgba(139, 92, 246, 0.15); color: var(--purple); }

.course-card__icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.course-card__title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.course-card__desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.course-card__features {
    margin-bottom: 1.5rem;
}
.course-card__features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.course-card__features li i { color: var(--success); font-size: 0.8rem; }

/* ============ PRICING ============ */
.pricing__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    align-items: start;
}

.pricing-card {
    padding: 2.5rem 2rem;
    position: relative;
    overflow: hidden;
}

.pricing-card--featured {
    border-color: var(--accent-1);
    box-shadow: var(--glass-shadow), 0 0 40px rgba(245, 158, 11, 0.15);
    transform: scale(1.05);
}
.pricing-card--featured:hover {
    transform: scale(1.05) translateY(-2px);
}

.featured-badge {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    text-align: center;
    background: var(--gradient-accent);
    color: #0f172a;
    padding: 0.4rem;
    font-size: 0.8rem;
    font-weight: 700;
}

.pricing-card__header {
    margin-bottom: 1.5rem;
}
.pricing-card__header h3 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}
.pricing-card__header p { color: var(--text-secondary); font-size: 0.9rem; }

.pricing-card--featured .pricing-card__header { margin-top: 1rem; }

.pricing-card__price {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
}
.price-amount {
    font-size: 2.25rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.price-currency {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-left: 0.25rem;
}

.pricing-card__features {
    margin-bottom: 2rem;
}
.pricing-card__features li {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 0;
    font-size: 0.9rem;
}
.pricing-card__features li i { font-size: 0.8rem; }
.pricing-card__features li .fa-check { color: var(--success); }
.pricing-card__features li .fa-xmark { color: var(--text-tertiary); }
.pricing-card__features li.disabled { color: var(--text-tertiary); }

/* ============ STUDENTS / TESTIMONIALS ============ */
.students__slider {
    overflow: hidden;
    position: relative;
}

.students__track {
    display: flex;
    gap: 1.5rem;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.student-card {
    min-width: calc(33.333% - 1rem);
    max-width: calc(33.333% - 1rem);
    padding: 2rem;
    flex-shrink: 0;
    overflow: hidden;
}

.student-card__stars {
    display: flex;
    gap: 0.2rem;
    color: var(--accent-1);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.student-card__text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-style: italic;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.student-card__author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.author-avatar {
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.student-card__author strong { display: block; font-size: 0.95rem; }
.student-card__author small { color: var(--text-secondary); font-size: 0.8rem; }

.students__controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.slider-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    transition: all var(--transition);
}
.slider-btn:hover { background: var(--glass-hover); border-color: var(--primary-3); }

.slider-dots {
    display: flex;
    gap: 0.5rem;
}
.slider-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--glass-border);
    cursor: pointer;
    transition: all var(--transition);
}
.slider-dot.active {
    background: var(--primary-3);
    width: 24px;
    border-radius: 50px;
}

/* ============ VIDEOS ============ */
.videos__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 1.5rem;
}

.video-card {
    overflow: hidden;
    cursor: pointer;
}
.video-card:hover .play-button { transform: translate(-50%, -50%) scale(1.15); }
.video-card:hover .video-card__thumbnail img,
.video-card:hover .video-thumbnail-bg { transform: scale(1.05); }

.video-card--large {
    grid-row: 1 / 3;
    display: flex;
    flex-direction: column;
}

.video-card__thumbnail {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
}

.video-card--large .video-card__thumbnail {
    aspect-ratio: auto;
    flex: 1;
    min-height: 0;
}

.video-thumbnail-bg {
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition);
}
.thumbnail-bg-2 { background: linear-gradient(135deg, #7c3aed, #2563eb); }
.thumbnail-bg-3 { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.thumbnail-bg-4 { background: linear-gradient(135deg, #10b981, #2563eb); }

.video-emoji { font-size: 3rem; }
.video-card--large .video-emoji { font-size: 5rem; }

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1rem;
    transition: all var(--transition);
}

.video-duration {
    position: absolute;
    bottom: 0.75rem;
    right: 0.75rem;
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.video-card__info {
    padding: 1.25rem;
}
.video-card__info h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.4rem; }
.video-card__info p { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 0.6rem; }

.video-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-tertiary);
}
.video-meta i { margin-right: 0.3rem; }

/* ============ REGISTRATION ============ */
.register__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

.register__info {
    padding: 2.5rem;
}
.register__info h3 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 2rem;
}

.register__benefits {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.benefit-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}
.benefit-icon {
    width: 3rem;
    height: 3rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(37, 99, 235, 0.15);
    color: var(--primary-3);
    font-size: 1.1rem;
    flex-shrink: 0;
}
.benefit-item strong { display: block; margin-bottom: 0.2rem; }
.benefit-item p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; }

.register__form {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-note {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: 0.5rem;
}
.form-note i { margin-right: 0.25rem; }

/* ============ FOOTER ============ */
.footer {
    position: relative;
    z-index: 1;
    padding: 4rem 0 0;
    background: var(--glass-bg);
    border-top: 1px solid var(--glass-border);
}

.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 2.5rem;
    padding-bottom: 3rem;
}

.footer__brand .nav__logo { margin-bottom: 1rem; }
.footer__desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.footer__socials {
    display: flex;
    gap: 0.75rem;
}
.social-link {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 1rem;
    transition: all var(--transition);
}
.social-link:hover {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
    transform: translateY(-3px);
}

.footer__links h4,
.footer__contact h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.footer__links li { margin-bottom: 0.6rem; }
.footer__links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all var(--transition);
}
.footer__links a:hover { color: var(--primary-3); padding-left: 0.25rem; }

.footer__contact {
    justify-self: end;
    text-align: left;
}
.footer__contact li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.footer__contact li i {
    color: var(--primary-3);
    margin-top: 0.2rem;
    width: 1rem;
    text-align: center;
}
.footer__contact a { color: var(--text-secondary); }
.footer__contact a:hover { color: var(--primary-3); }

.footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 0;
    border-top: 1px solid var(--glass-border);
    font-size: 0.85rem;
    color: var(--text-tertiary);
}
.footer__bottom-links { display: flex; gap: 1.5rem; }
.footer__bottom-links a { color: var(--text-tertiary); }
.footer__bottom-links a:hover { color: var(--text-primary); }

/* ============ TOAST ============ */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 3000;
    transform: translateX(120%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.toast.active { transform: translateX(0); }

.toast-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--success);
    border-radius: var(--radius-md);
    color: var(--success);
    font-weight: 600;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

/* ============ SCROLL ANIMATIONS ============ */
.result-card,
.course-card,
.pricing-card,
.student-card,
.video-card,
.benefit-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.result-card.visible,
.course-card.visible,
.pricing-card.visible,
.student-card.visible,
.video-card.visible,
.benefit-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger */
.result-card:nth-child(2), .course-card:nth-child(2), .pricing-card:nth-child(2) { transition-delay: 0.1s; }
.result-card:nth-child(3), .course-card:nth-child(3), .pricing-card:nth-child(3) { transition-delay: 0.2s; }
.result-card:nth-child(4) { transition-delay: 0.3s; }
.benefit-item:nth-child(2) { transition-delay: 0.1s; }
.benefit-item:nth-child(3) { transition-delay: 0.2s; }
.benefit-item:nth-child(4) { transition-delay: 0.3s; }

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
    .hero__title { font-size: 2.75rem; }
    .results__grid { grid-template-columns: repeat(2, 1fr); }
    .courses__grid { grid-template-columns: repeat(2, 1fr); }
    .pricing__grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-card--featured { transform: scale(1); }
    .pricing-card--featured:hover { transform: translateY(-2px); }
    .footer__grid { grid-template-columns: repeat(2, 1fr); }
    .student-card { min-width: calc(50% - 0.75rem); max-width: calc(50% - 0.75rem); }
    .topik-card { min-width: calc((100% - 3rem) / 4); max-width: calc((100% - 3rem) / 4); }
}

@media (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: var(--bg-secondary);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 5rem 2rem 2rem;
        transition: right var(--transition);
        z-index: 90;
        border-left: 1px solid var(--glass-border);
    }
    .nav__menu.show { right: 0; }
    .nav__list { flex-direction: column; gap: 0.25rem; }
    .nav__link { padding: 0.75rem 1rem; font-size: 1rem; }
    .nav__close,
    .nav__toggle { display: block; }
    .nav__close {
        position: absolute;
        top: 1.25rem;
        right: 1.25rem;
    }

    .hero__container { grid-template-columns: 1fr; gap: 2rem; text-align: center; }
    .hero__title { font-size: 2.25rem; }
    .hero__description { margin: 0 auto 2rem; }
    .hero__buttons { justify-content: center; }
    .hero__stats { justify-content: center; }
    .hero__image { order: -1; }
    .hero__image-wrapper { width: 280px; height: 280px; }
    .hero__floating-card { display: none; }

    .section__title { font-size: 2rem; }

    .results__grid { grid-template-columns: 1fr 1fr; }
    .topik-card { min-width: calc((100% - 2rem) / 3); max-width: calc((100% - 2rem) / 3); }
    .courses__grid { grid-template-columns: 1fr; max-width: 450px; margin: 0 auto; }
    .pricing__grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
    .videos__grid { grid-template-columns: 1fr; }
    .video-card--large { grid-row: auto; }
    .register__container { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }

    .student-card { min-width: calc(100% - 0rem); max-width: calc(100% - 0rem); }

    .footer__grid { grid-template-columns: 1fr; gap: 2rem; }
    .footer__bottom { flex-direction: column; gap: 1rem; text-align: center; }
}

@media (max-width: 480px) {
    .hero__title { font-size: 1.85rem; }
    .hero__stats { flex-direction: column; gap: 1rem; }
    .stat-divider { width: 40px; height: 1px; }
    .section { padding: 4rem 0; }
    .section__title { font-size: 1.6rem; }
    .results__grid { grid-template-columns: 1fr; }
    .topik-card { min-width: calc(100% - 0rem); max-width: calc(100% - 0rem); }
    .btn-lg { padding: 0.85rem 1.5rem; font-size: 0.95rem; }
}