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

:root {
    --light-canvas: #ffffff;
    --light-surface: rgba(0, 0, 0, 0.02);
    --light-surface-strong: rgba(0, 0, 0, 0.04);
    --light-border: rgba(0, 0, 0, 0.08);
    --light-border-strong: rgba(0, 0, 0, 0.14);
    --light-text: #000000;
    --light-text-secondary: rgba(0, 0, 0, 0.78);
    --light-text-muted: rgba(0, 0, 0, 0.58);
    --dark-canvas: #171717;
    --dark-surface: #0f0f0f;
    --dark-surface-soft: rgba(41, 41, 41, 0.84);
    --dark-border: #2e2e2e;
    --dark-border-strong: #363636;
    --dark-border-stronger: #393939;
    --dark-text: #fafafa;
    --dark-text-secondary: #cecece;
    --dark-text-muted: #aaaaaa;
    --accent: #3ecf8e;
    --accent-strong: #00c573;
    --accent-border: rgba(62, 207, 142, 0.3);
    --pastel-pink: #ef2cc1;
    --pastel-orange: #fc4c02;
    --pastel-lavender: #bdbbff;
    --shadow-light: rgba(1, 1, 32, 0.1);
    --font-display: 'Montserrat', sans-serif;
    --font-body: 'Montserrat', sans-serif;
    --font-mono: 'Montserrat', sans-serif;
    --radius-xs: 6px;
    --radius-sm: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-pill: 9999px;
    --container: 1200px;
    --transition: 260ms cubic-bezier(0.22, 1, 0.36, 1);

    /* Motion Tokens */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out-expo: cubic-bezier(0.87, 0, 0.13, 1);
    --ease-premium: cubic-bezier(0.22, 1, 0.36, 1);
    --duration-sm: 200ms;
    --duration-md: 400ms;
    --duration-lg: 800ms;
    --duration-xl: 1200ms;
}

html {
    scroll-behavior: smooth;
}

body {
    zoom: 0.9;
    font-family: var(--font-body);
    background: var(--light-canvas);
    color: var(--light-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4,
.logo-text,
.nav-link,
.btn {
    font-family: var(--font-display);
}

p,
li,
a,
label,
input,
textarea,
select,
span {
    font-family: var(--font-body);
}

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

button,
input,
textarea,
select {
    font: inherit;
}

.container {
    width: min(var(--container), calc(100% - 48px));
    margin: 0 auto;
}

.section {
    position: relative;
    padding: 96px 0;
}

.section-light {
    background: var(--light-canvas);
    color: var(--light-text);
}

.section-dark {
    background: var(--dark-canvas);
    color: var(--dark-text);
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--light-text-muted);
    margin-bottom: 18px;
}

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

/* === HEADER === */
.header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    padding: 14px 0;
    background: rgba(23, 23, 23, 0.72);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
    transition: background 180ms var(--ease-out-expo), border-color 180ms var(--ease-out-expo), box-shadow var(--transition), color 180ms var(--ease-out-expo);
}

/* Scrolled state: padding stays consistent */
.header.scrolled {
    /* Padding removed to stay 14px from base class */
}

/* Header on dark hero (not scrolled) → white text */
.header:not(.scrolled) {
    color: #fafafa;
}

.header:not(.scrolled) .logo-text,
.header:not(.scrolled) .nav-link {
    color: rgba(255, 255, 255, 0.75);
}

.header:not(.scrolled) .nav-link:hover,
.header:not(.scrolled) .nav-link.active {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

.header:not(.scrolled) .logo-meta {
    color: rgba(255, 255, 255, 0.45);
}

.header:not(.scrolled) .nav {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.08);
}

.header:not(.scrolled) .btn-secondary {
    border-color: rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.8);
}

.header:not(.scrolled) .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
}

.header:not(.scrolled) .btn-primary {
    background: #fafafa;
    color: #0a0a0a;
}

.header:not(.scrolled) .menu-toggle {
    border-color: rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.06);
}

.header:not(.scrolled) .menu-toggle span {
    background: #fafafa;
}

/* Default scrolled nav children (over light → dark glass + white text) */
.header.scrolled .logo-text {
    color: rgba(255, 255, 255, 0.92);
}

.header.scrolled .logo-meta {
    color: rgba(255, 255, 255, 0.45);
}

.header.scrolled .nav {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.08);
}

.header.scrolled .nav-link {
    color: rgba(255, 255, 255, 0.7);
}

.header.scrolled .nav-link:hover,
.header.scrolled .nav-link.active {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.12);
}

.header.scrolled .btn-secondary {
    border-color: rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.8);
}

.header.scrolled .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
}

.header.scrolled .btn-primary {
    background: #fafafa;
    color: #0a0a0a;
}

.header.scrolled .menu-toggle {
    border-color: rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.06);
}

.header.scrolled .menu-toggle span {
    background: #fafafa;
}

/* === ADAPTIVE HEADER: scrolled + over DARK section → white glass + dark text === */
.header.scrolled.header-on-dark {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.04);
    color: #0a0a0a;
}

.header.scrolled.header-on-dark .logo-text {
    color: rgba(0, 0, 0, 0.9);
}

.header.scrolled.header-on-dark .logo-meta {
    color: rgba(0, 0, 0, 0.5);
}

.header.scrolled.header-on-dark .nav {
    background: rgba(255, 255, 255, 0.48);
    border-color: rgba(0, 0, 0, 0.05);
}

.header.scrolled.header-on-dark .nav-link {
    color: rgba(0, 0, 0, 0.7);
}

.header.scrolled.header-on-dark .nav-link:hover,
.header.scrolled.header-on-dark .nav-link.active {
    color: #000000;
    background: rgba(255, 255, 255, 0.9);
}

.header.scrolled.header-on-dark .btn-secondary {
    border-color: rgba(0, 0, 0, 0.1);
    color: rgba(0, 0, 0, 0.8);
}

.header.scrolled.header-on-dark .btn-secondary:hover {
    background: rgba(0, 0, 0, 0.04);
}

.header.scrolled.header-on-dark .btn-primary {
    background: #0a0a0a;
    color: #fafafa;
    box-shadow: 0 4px 10px var(--shadow-light);
}

.header.scrolled.header-on-dark .menu-toggle {
    border-color: rgba(0, 0, 0, 0.12);
    background: rgba(255, 255, 255, 0.7);
}

.header.scrolled.header-on-dark .menu-toggle span {
    background: #0a0a0a;
}

.header-container {
    width: min(var(--container), calc(100% - 48px));
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    color: inherit;
    text-decoration: none;
    min-width: 0;
}

.logo-icon,
.logo-image {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: linear-gradient(145deg, rgba(239, 44, 193, 0.16), rgba(189, 187, 255, 0.28));
    border: 1px solid rgba(0, 0, 0, 0.06);
    color: var(--light-text);
    font-weight: 700;
    font-size: 19px;
    object-fit: cover;
}

.logo-lockup {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.04em;
    transition: color var(--transition);
}

.logo-meta {
    font-family: var(--font-mono);
    font-size: 15px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--light-text-muted);
    transition: color var(--transition);
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px;
    background: rgba(255, 255, 255, 0.48);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-pill);
    transition: background var(--transition), border-color var(--transition);
}

.nav-link {
    padding: 10px 16px;
    border-radius: var(--radius-pill);
    text-decoration: none;
    color: var(--light-text-secondary);
    font-size: 18px;
    font-weight: 500;
    transition: color var(--transition), background var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--light-text);
    background: rgba(255, 255, 255, 0.9);
}

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

.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 1px solid var(--light-border);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    padding: 0;
}

.menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    margin: 4px auto;
    background: var(--light-text);
    transition: transform var(--transition), opacity var(--transition);
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    text-decoration: none;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
    white-space: nowrap;
}

.btn-small {
    min-height: 44px;
    padding: 0 22px;
    font-size: 17px;
    font-weight: 600;
}

.btn-large {
    min-height: 56px;
    padding: 0 28px;
    font-size: 20px;
    font-weight: 500;
}

.btn-merch {
    min-height: 40px;
    padding: 0 20px;
    font-size: 17px;
    font-weight: 600;
}

.btn-primary {
    border-radius: var(--radius-pill);
    background: var(--dark-surface);
    color: var(--dark-text);
    box-shadow: 0 4px 10px var(--shadow-light);
}

.btn-primary:hover {
    transform: translateY(-1px);
    background: #010120;
}

.btn-secondary {
    border-radius: var(--radius-sm);
    background: transparent;
    color: inherit;
    border-color: rgba(0, 0, 0, 0.08);
}

.btn-secondary:hover {
    background: rgba(0, 0, 0, 0.04);
}

.section-dark .btn-primary {
    background: var(--dark-surface);
    color: var(--dark-text);
    border-color: var(--dark-text);
    box-shadow: none;
}

.section-dark .btn-primary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.section-dark .btn-secondary {
    border-color: var(--dark-border);
    color: var(--dark-text);
}

.section-dark .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--dark-border-strong);
}

/* === HERO === */
.hero {
    position: relative;
    min-height: auto;
    padding: 130px 0 80px;
    background: #0a0a0a;
    color: #fafafa;
    overflow: hidden;
}

.hero-atmosphere {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
}

.hero-glow-1 {
    width: 600px;
    height: 600px;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    background: radial-gradient(circle, rgba(62, 207, 142, 0.18) 0%, transparent 70%);
}

.hero-glow-2 {
    width: 400px;
    height: 400px;
    bottom: -100px;
    right: -100px;
    background: radial-gradient(circle, rgba(189, 187, 255, 0.12) 0%, transparent 70%);
}

.hero-grain {
    position: absolute;
    inset: 0;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
    background-size: 256px 256px;
}

.hero-shell {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px 6px 12px;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(62, 207, 142, 0.2);
    background: rgba(62, 207, 142, 0.08);
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 28px;
}

.hero-badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(62, 207, 142, 0.4); }
    50% { opacity: 0.7; box-shadow: 0 0 0 6px rgba(62, 207, 142, 0); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(42px, 6.5vw, 86px);
    line-height: 1.1;
    letter-spacing: -0.05em;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 20px;
    overflow: visible;
}

.hero-title-accent {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent) 0%, #6ee7b7 50%, var(--pastel-lavender) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    padding: 0.1em 0.15em;
    margin: -0.1em -0.15em;
    font-size: calc(100% - 2px);
}

.hero-subtitle {
    max-width: 800px;
    margin: 0 auto 36px;
    font-size: 22px;
    line-height: 1.65;
    color: rgba(255, 255, 255, 0.55);
    font-weight: 400;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
}

.btn-accent {
    border-radius: var(--radius-pill);
    background: var(--accent-strong);
    color: #000000;
    font-weight: 600;
    box-shadow: 0 0 24px rgba(62, 207, 142, 0.25);
    gap: 8px;
}

.btn-accent:hover {
    transform: translateY(-2px);
    background: var(--accent);
    box-shadow: 0 0 40px rgba(62, 207, 142, 0.35);
}

.btn-ghost {
    border-radius: var(--radius-pill);
    background: transparent;
    color: rgba(255, 255, 255, 0.75);
    border: 1px solid rgba(255, 255, 255, 0.12);
    gap: 8px;
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.2);
    color: #ffffff;
}

.hero-stats-bar {
    display: flex;
    align-items: center;
    justify-content: space-around;
    width: 100%;
    max-width: 800px;
    padding: 20px 32px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(255, 255, 255, 0.03);
    margin-bottom: 48px;
}

.hero-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.hero-stat-value {
    display: flex;
    align-items: baseline;
    gap: 2px;
}

.hero-stat-number {
    font-family: var(--font-display);
    font-size: clamp(30px, 3.5vw, 42px);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.04em;
    color: #ffffff;
}

.hero-stat-plus {
    font-family: var(--font-display);
    font-size: clamp(20px, 2.2vw, 26px);
    font-weight: 700;
    color: var(--accent);
    transform: translateY(-2px);
}

.hero-stat-label {
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
}

.hero-stat-divider {
    width: 1px;
    height: 36px;
    background: rgba(255, 255, 255, 0.08);
}

.hero-subjects {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    width: 100%;
    max-width: 860px;
}

.hero-subject {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(255, 255, 255, 0.03);
    text-align: left;
    transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.hero-subject:hover {
    border-color: rgba(62, 207, 142, 0.2);
    background: rgba(62, 207, 142, 0.05);
    transform: translateY(-2px);
}

.hero-subject-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, 0.06);
    color: var(--accent);
}

.hero-subject-kicker {
    display: block;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 2px;
}

.hero-subject strong {
    display: block;
    font-size: 19px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 4px;
}

.hero-subject-desc {
    font-size: 17px;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 400;
}

.hero-subject-accent {
    border-color: rgba(62, 207, 142, 0.15);
    background: rgba(62, 207, 142, 0.06);
}

.hero-subject-accent .hero-subject-icon {
    background: rgba(62, 207, 142, 0.12);
}

/* === SCROLL DOWN ANIMATION === */
.hero-scroll-down {
    margin-top: 60px;
    display: flex;
    justify-content: center;
    width: 100%;
}

.scroll-bounce {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--accent);
    opacity: 0.8;
    transition: opacity var(--transition), transform var(--transition);
}

.scroll-bounce:hover {
    opacity: 1;
    transform: translateY(-5px);
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 14px;
    position: relative;
    margin-bottom: 8px;
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 15px rgba(62, 207, 142, 0.1), inset 0 0 10px rgba(255, 255, 255, 0.05);
    transition: border-color var(--transition);
}

.scroll-bounce:hover .mouse {
    border-color: rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 20px rgba(62, 207, 142, 0.3), inset 0 0 15px rgba(255, 255, 255, 0.1);
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--accent);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-wheel 2s cubic-bezier(0.15, 0.41, 0.69, 0.94) infinite;
    box-shadow: 0 0 8px var(--accent);
}

.chevron {
    width: 10px;
    height: 10px;
    border-right: 2px solid var(--accent);
    border-bottom: 2px solid var(--accent);
    transform: rotate(45deg);
    margin-top: -4px;
    animation: scroll-chevron 2s infinite;
}

.chevron:nth-child(2) {
    animation-delay: 0.15s;
}

.chevron:nth-child(3) {
    animation-delay: 0.3s;
}

.chevron:nth-child(4) {
    animation-delay: 0.45s;
}

@keyframes scroll-wheel {
    0% { top: 6px; opacity: 1; transform: translateX(-50%) scaleY(1); }
    20% { top: 6px; opacity: 1; transform: translateX(-50%) scaleY(1); }
    80% { top: 22px; opacity: 0; transform: translateX(-50%) scaleY(0.5); }
    100% { top: 22px; opacity: 0; transform: translateX(-50%) scaleY(0.5); }
}

@keyframes scroll-chevron {
    0% { opacity: 0; transform: rotate(45deg) translate(-5px, -5px); }
    50% { opacity: 1; transform: rotate(45deg) translate(0, 0); }
    100% { opacity: 0; transform: rotate(45deg) translate(5px, 5px); }
}

/* === LIGHT INTRO / COURSE / FOOTER === */
.intro-band {
    padding: 80px 0;
    overflow: hidden;
}

.intro-header {
    max-width: 800px;
    margin: 0 auto 64px;
    text-align: center;
}

.how-it-works-narrative {
    position: relative;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    justify-items: center;
}

/* Horizontal connector line between steps */
.how-it-works-narrative::before {
    content: '';
    position: absolute;
    top: 78px;
    left: calc(16.67% + 24px);
    right: calc(16.67% + 24px);
    height: 2px;
    background: linear-gradient(to right, 
        transparent 0%,
        rgba(59, 130, 246, 0.35) 8%,
        rgba(59, 130, 246, 0.35) 92%,
        transparent 100%
    );
    z-index: 0;
    pointer-events: none;
}

.narrative-step {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 16px;
    padding: 40px 28px 36px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.04) 0%, rgba(255, 255, 255, 0.8) 60%);
    border: 1.5px solid rgba(59, 130, 246, 0.15);
    border-radius: var(--radius-xl);
    z-index: 1;
    transition: all 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    width: 100%;
    max-width: 340px;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.06);
}

.narrative-step.reveal {
    opacity: 0;
    filter: blur(6px);
    transform: translateY(30px);
    transition: all 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.narrative-step.reveal.visible {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0);
}

.narrative-step:hover {
    transform: translateY(-6px);
    box-shadow: 
        0 20px 40px -12px rgba(0, 0, 0, 0.1),
        0 0 0 1px rgba(59, 130, 246, 0.15);
    border-color: rgba(59, 130, 246, 0.2);
}

.narrative-step .step-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.step-counter {
    position: static;
    font-family: var(--font-display);
    font-size: 42px;
    font-weight: 900;
    line-height: 1;
    color: #3b82f6;
    opacity: 0.35;
    pointer-events: none;
    user-select: none;
    margin-bottom: 4px;
}

.step-title {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--light-text);
    margin-bottom: 8px;
}

.step-description {
    font-size: 16px;
    line-height: 1.6;
    color: var(--light-text-secondary);
    max-width: 280px;
}

.narrative-step .step-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 12px;
}

.visual-card {
    position: relative;
    width: 160px;
    height: 160px;
    border-radius: 24px;
    display: grid;
    place-items: center;
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    cursor: default;
}

.narrative-step:hover .visual-card {
    transform: scale(1.06);
}

.visual-card:hover {
    transform: scale(1.08) rotate(2deg);
}

.glass-premium {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: 
        0 20px 50px rgba(0, 0, 0, 0.04),
        inset 0 0 0 1px rgba(255, 255, 255, 0.4);
}

.visual-icon-aura {
    position: absolute;
    width: 90px;
    height: 90px;
    background: #3b82f6;
    filter: blur(40px);
    opacity: 0.15;
    border-radius: 50%;
    animation: aura-pulse 4s ease-in-out infinite;
}

@keyframes aura-pulse {
    0%, 100% { transform: scale(1); opacity: 0.15; }
    50% { transform: scale(1.2); opacity: 0.25; }
}

.visual-icon {
    width: 44px;
    height: 44px;
    color: #2563eb;
    z-index: 2;
    filter: drop-shadow(0 0 10px rgba(59, 130, 246, 0.3));
}

.accent-emerald .visual-icon { color: #3b82f6; }
.accent-emerald .visual-icon-aura { background: #3b82f6; }

.accent-purple .visual-icon { color: #3b82f6; }
.accent-purple .visual-icon-aura { background: #3b82f6; }

.visual-accent-line {
    position: absolute;
    bottom: 28px;
    left: 28px;
    right: 28px;
    height: 3px;
    background: linear-gradient(to right, #3b82f6, transparent);
    border-radius: 2px;
    opacity: 0.25;
}

/* Mobile optimizations for Narrative */
@media (max-width: 860px) {
    .how-it-works-narrative {
        grid-template-columns: 1fr;
        gap: 20px;
        max-width: 480px;
    }

    .how-it-works-narrative::before {
        display: none;
    }

    .narrative-step {
        padding: 32px 20px 28px;
    }

    .visual-card {
        width: 140px;
        height: 140px;
        border-radius: 20px;
    }

    .step-counter {
        font-size: 38px;
    }

    .step-title {
        font-size: 20px;
    }

    .step-description {
        font-size: 15px;
        max-width: 100%;
    }
}

.section-header {
    max-width: 760px;
    margin: 0 auto 56px;
    text-align: center;
}

.section-header-left {
    margin: 0;
    text-align: left;
}


.section-tag {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0 20px;
    border-radius: var(--radius-pill);
    background: rgba(62, 207, 142, 0.1);
    border: 1px solid rgba(62, 207, 142, 0.25);
    color: var(--accent-strong);
    font-family: var(--font-mono);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 24px;
    transition: transform var(--duration-md) var(--ease-out-expo), box-shadow var(--duration-md) var(--ease-out-expo);
}

.section-tag:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 20px rgba(62, 207, 142, 0.15);
}

.section-tag-light {
    background: linear-gradient(135deg, rgba(62, 207, 142, 0.08) 0%, rgba(189, 187, 255, 0.12) 100%);
    border-color: rgba(62, 207, 142, 0.2);
    color: var(--accent-strong);
}

.section-tag-light.tag-alt {
    background: linear-gradient(135deg, rgba(239, 44, 193, 0.08) 0%, rgba(252, 76, 2, 0.12) 100%);
    border-color: rgba(239, 44, 193, 0.2);
    color: var(--pastel-pink);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(40px, 5vw, 58px);
    line-height: 1.08;
    letter-spacing: -0.035em;
    font-weight: 700;
}

.section-title-dark {
    color: var(--light-text);
}

.section-desc,
.footer-brand p {
    font-size: 22px;
    line-height: 1.6;
    letter-spacing: -0.015em;
    font-weight: 450;
}

.section-desc {
    max-width: 700px;
    margin: 16px auto 0;
    color: var(--dark-text-secondary);
}

.section-desc-dark {
    color: var(--light-text-secondary);
}

.intro-copy {
    display: grid;
    gap: 20px;
    color: var(--light-text-secondary);
}

.intro-copy p {
    font-size: 19px;
    line-height: 1.72;
    letter-spacing: -0.01em;
}

/* === DARK CONTENT === */
.section-video,
.section-merch {
    background:
        radial-gradient(circle at top right, rgba(62, 207, 142, 0.08), transparent 28%),
        linear-gradient(180deg, #171717 0%, #111111 100%);
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.video-card,
.merch-card {
    background: var(--dark-surface-soft);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    display: flex;
    flex-direction: column;
}

.video-card:hover,
.merch-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-border);
    box-shadow:
        0 20px 40px rgba(0, 0, 0, 0.4),
        0 0 80px -20px rgba(62, 207, 142, 0.15);
}

.video-card.featured {
    grid-column: span 2;
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
}

.video-embed {
    position: relative;
    cursor: pointer;
}

.video-thumb {
    position: relative;
    aspect-ratio: 16 / 9;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.12), rgba(0, 0, 0, 0.45));
}

.video-play {
    position: relative;
    z-index: 1;
    width: 68px;
    height: 68px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, 0.92);
    color: #111;
    transition: transform var(--transition), background var(--transition);
}

.small-play {
    width: 54px;
    height: 54px;
}

.video-embed:hover .video-play {
    transform: scale(1.05);
    background: var(--accent);
}

.video-duration {
    position: absolute;
    right: 14px;
    bottom: 14px;
    z-index: 1;
    min-height: 28px;
    padding: 0 10px;
    display: inline-flex;
    align-items: center;
    border-radius: var(--radius-xs);
    background: rgba(15, 15, 15, 0.92);
    border: 1px solid var(--dark-border);
    color: var(--dark-text);
    font-family: var(--font-mono);
    font-size: 15px;
}

.video-info,
.merch-info {
    padding: 26px;
    display: flex;
    flex: 1;
    flex-direction: column;
}

.video-title,
.course-title,
.merch-name {
    font-size: 29px;
    line-height: 1.14;
    letter-spacing: -0.04em;
}

.video-card:not(.featured) .video-title {
    font-size: 22px;
}

.video-desc,
.merch-desc {
    margin-top: 14px;
    color: var(--dark-text-secondary);
    font-size: 17px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    margin-top: 14px;
    color: var(--dark-text-muted);
    font-size: 16px;
}

.section-cta {
    margin-top: 40px;
    text-align: center;
}

/* === COURSES === */
.section-courses {
    background:
        radial-gradient(circle at top left, rgba(239, 44, 193, 0.07), transparent 24%),
        radial-gradient(circle at right 20%, rgba(189, 187, 255, 0.12), transparent 24%),
        #ffffff;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(410px, 500px));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
    justify-content: space-between;
}

.course-card {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    min-height: 580px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 
        0 10px 30px -10px rgba(0, 0, 0, 0.08),
        0 4px 6px -2px rgba(0, 0, 0, 0.02);
    transition: all 0.5s cubic-bezier(0.22, 1, 0.36, 1);
    position: relative;
    backdrop-filter: blur(10px);
}

.course-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow:
        0 32px 64px -16px rgba(1, 1, 32, 0.15),
        0 0 0 1px rgba(62, 207, 142, 0.1);
}

.course-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(62, 207, 142, 0.03) 0%, rgba(189, 187, 255, 0.03) 100%);
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    pointer-events: none;
}

.course-card:hover::before {
    opacity: 1;
}

.course-image {
    position: relative;
    height: 340px;
    flex-shrink: 0;
    border-bottom: none;
    z-index: 1;
    overflow: hidden;
}

.course-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.15) 100%);
    pointer-events: none;
}

.course-card:hover .course-image img {
    transform: scale(1.05);
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 20%;
    transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.pastel-1 {
    background: linear-gradient(135deg, rgba(239, 44, 193, 0.18), rgba(189, 187, 255, 0.35));
}

.pastel-2 {
    background: linear-gradient(135deg, rgba(252, 76, 2, 0.18), rgba(239, 44, 193, 0.22));
}

.pastel-3 {
    background: linear-gradient(135deg, rgba(62, 207, 142, 0.16), rgba(189, 187, 255, 0.22));
}

.pastel-4 {
    background: linear-gradient(135deg, rgba(189, 187, 255, 0.18), rgba(255, 255, 255, 0.92));
}

.course-badge {
    position: absolute;
    top: 18px;
    left: 18px;
    height: 32px;
    padding: 0 16px;
    display: inline-flex;
    align-items: center;
    border-radius: var(--radius-pill);
    background: #111;
    color: #fff;
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 2;
}

.badge-online {
    background: #000;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.badge-hot {
    background: linear-gradient(135deg, #ff3b6c, #ff6b35);
    border: none;
    box-shadow: 0 4px 16px rgba(255, 59, 108, 0.35);
    animation: pulse-badge 2s ease-in-out infinite;
}

@keyframes pulse-badge {

    0%,
    100% {
        box-shadow: 0 4px 16px rgba(255, 59, 108, 0.35);
    }

    50% {
        box-shadow: 0 4px 24px rgba(255, 59, 108, 0.5);
    }
}

.course-content {
    display: flex;
    flex: 1;
    flex-direction: column;
    padding: 32px;
    position: relative;
    z-index: 2;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid rgba(255, 255, 255, 0.5);
}

.course-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.course-meta span {
    padding: 6px 12px;
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-xs);
    color: var(--light-text-secondary);
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    transition: all 0.3s ease;
}

.course-card:hover .course-meta span {
    background: #fff;
    border-color: rgba(62, 207, 142, 0.2);
    color: var(--accent-strong);
}

.course-desc,
.course-features {
    margin-top: 16px;
    color: var(--light-text-secondary);
    font-size: 20px;
    line-height: 1.6;
}

.course-features {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.course-features li {
    position: relative;
    padding-left: 22px;
}

.course-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
}

.course-footer,
.merch-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 26px;
    padding-top: 20px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.course-price {
    font-size: 19px;
    font-weight: 600;
    color: var(--light-text-muted);
    letter-spacing: -0.01em;
}

.merch-price {
    font-size: 24px;
    line-height: 1;
    letter-spacing: -0.04em;
    font-weight: 700;
    color: var(--dark-text);
}

.course-card:hover .course-price {
    color: var(--light-text-secondary);
}

.course-link,
.video-link {
    gap: 10px;
    font-size: 20px !important;
    font-weight: 700 !important;
    letter-spacing: -0.01em;
    overflow: hidden;
    position: relative;
    border-radius: var(--radius-pill) !important;
    padding: 0 28px !important;
    min-height: 50px !important;
}

.course-link,
.video-link {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%) !important;
    color: #fff !important;
    border: none !important;
    box-shadow: 0 8px 24px -6px rgba(62, 207, 142, 0.4) !important;
}

.course-link::after,
.video-link::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -60%;
    width: 30%;
    height: 200%;
    background: linear-gradient(
        to right,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    transform: rotate(30deg);
}

.course-link:hover,
.video-link:hover {
    transform: translateY(-2px) scale(1.02) !important;
    box-shadow: 0 12px 32px -8px rgba(62, 207, 142, 0.5) !important;
    color: #fff !important;
}

.course-link:hover::after,
.video-link:hover::after {
    left: 150%;
    transition: left 0.8s ease-in-out;
}

.course-link svg,
.video-link svg {
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.course-link:hover svg,
.video-link:hover svg {
    transform: translateX(4px);
}

.course-footer {
    margin-top: auto;
}

/* === MERCH === */
.merch-carousel {
    position: relative;
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    gap: 18px;
    align-items: center;
    justify-content: center;
}

.merch-viewport {
    width: 100%;
    flex: 1;
    min-width: 0;
    overflow: hidden;
    border-radius: var(--radius-lg);
}

.merch-track {
    display: flex;
    width: 100%;
    transition: transform 600ms cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform;
}

.merch-track.no-transition {
    transition: none;
}

.merch-card {
    position: relative;
    z-index: 1;
    flex: 0 0 100%;
    width: 100%;
    min-width: 100%;
    min-height: 380px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(380px, 1.2fr);
    background:
        linear-gradient(90deg, rgba(15, 15, 15, 0.72), rgba(15, 15, 15, 0.92)),
        url('assets/images/merch-card-bg-demo.png') center / cover no-repeat,
        var(--dark-surface-soft);
}

.merch-image {
    min-height: 380px;
    min-width: 0;
    display: grid;
    place-items: center;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
    border-right: 1px solid var(--dark-border);
    border-bottom: 0;
    overflow: hidden;
    position: relative;
    max-width: 100%;
}

.merch-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(62, 207, 142, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s;
}

.merch-card:hover .merch-image::before {
    opacity: 1;
}

.merch-image img {
    transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1), filter 0.4s;
}

.merch-card:hover .merch-image img {
    transform: scale(1.08);
    filter: brightness(1.1);
}

.merch-placeholder {
    width: min(360px, 80%);
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-sm);
    display: grid;
    place-items: center;
    color: var(--dark-text-secondary);
    font-size: 18px;
    text-align: center;
    padding: 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.merch-shirt {
    background: linear-gradient(135deg, #26313f, #33485d);
}

.merch-hoodie {
    background: linear-gradient(135deg, #34283a, #4b3953);
}

.merch-keychain {
    background: linear-gradient(135deg, #223a33, #2f5447);
}

.merch-sticker {
    background: linear-gradient(135deg, #403528, #5a4c3c);
}

.merch-name {
    color: var(--dark-text);
    font-size: clamp(28px, 4vw, 42px);
    max-width: 14ch;
    margin-bottom: 12px;
}

.merch-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
    overflow: hidden;
    padding: 32px 40px;
}

.merch-variants {
    margin-top: 22px;
}

.merch-variants label {
    display: block;
    margin-bottom: 10px;
    font-family: var(--font-mono);
    font-size: 15px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--dark-text-muted);
}

.variant-options {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.variant-btn {
    min-height: 32px;
    padding: 0 12px;
    border-radius: var(--radius-xs);
    border: 1px solid var(--dark-border);
    background: transparent;
    color: var(--dark-text-secondary);
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.variant-btn:hover {
    border-color: var(--dark-border-stronger);
    color: var(--dark-text);
}

.variant-btn.active {
    border-color: var(--accent-border);
    background: rgba(62, 207, 142, 0.12);
    color: var(--accent);
}

.merch-footer {
    border-top-color: var(--dark-border);
}

.merch-arrow {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-pill);
    border: 1px solid var(--dark-border);
    background: rgba(255, 255, 255, 0.05);
    color: var(--dark-text);
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    font-size: 0; /* Hide the text character */
}

.merch-arrow::after {
    content: '';
    display: block;
    width: 10px;
    height: 10px;
    border-top: 2px solid currentColor;
    border-right: 2px solid currentColor;
    transition: transform var(--transition);
}

.merch-arrow-prev::after {
    transform: rotate(-135deg);
    margin-left: 4px;
}

.merch-arrow-next::after {
    transform: rotate(45deg);
    margin-right: 4px;
}

.merch-arrow:hover {
    transform: translateY(-2px);
    border-color: var(--accent-border);
    background: rgba(62, 207, 142, 0.1);
    color: var(--accent);
}

.merch-arrow:hover::after {
    transform: rotate(-135deg) scale(1.1);
}

.merch-arrow-next:hover::after {
    transform: rotate(45deg) scale(1.1);
}

.merch-footer .btn {
    position: relative;
    overflow: hidden;
}

.merch-footer .btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.merch-footer .btn:hover::before {
    transform: translateX(100%);
}

/* === FOOTER (Premium Redesign) === */
.footer-dark {
    position: relative;
    background: #0d1117;
    color: var(--dark-text);
    overflow: hidden;
    padding: 60px 0 40px;
}

.footer-shell {
    position: relative;
    z-index: 1;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col {
    display: flex;
    flex-direction: column;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 16px;
}

.footer-logo .logo-accent {
    color: #4b6fff; /* Blue accent for UIT */
}

.footer-description {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.6;
    margin-bottom: 20px;
    max-width: 320px;
}

/* Social icons */
.footer-socials {
    display: flex;
    gap: 12px;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, 0.05);
    color: #ffffff;
    transition: background var(--transition), transform var(--transition), color var(--transition);
    text-decoration: none;
}

.social-icon:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
    color: var(--accent);
}

.footer-title {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 15px;
    transition: color var(--transition);
}

.footer-links a:hover {
    color: #ffffff;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 14px;
    line-height: 1.5;
}

.contact-item svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: rgba(255, 255, 255, 0.4);
}

.contact-item:hover {
    color: #ffffff;
}



/* === REVEAL === */
.reveal {
    opacity: 0;
    filter: blur(8px);
    transform: translateY(32px);
    transition: 
        opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1), 
        transform 0.9s cubic-bezier(0.22, 1, 0.36, 1),
        filter 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0);
}

/* === RESPONSIVE === */

/* --- Tablet Landscape / Small Desktop (≤ 1120px) --- */
@media (max-width: 1120px) {

    .footer-top,
    .video-card.featured {
        grid-template-columns: 1fr;
    }

    .courses-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .merch-card {
        grid-template-columns: 1fr;
    }

    .merch-image {
        min-height: 270px;
        border-right: 0;
        border-bottom: 1px solid var(--dark-border);
    }

    .hero-subjects {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-top {
        gap: 40px;
    }

    .footer-right {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .section-header {
        margin-bottom: 40px;
    }
}

/* --- Tablet Portrait (≤ 860px) --- */
@media (max-width: 860px) {

    .hide-mobile {
        display: none;
    }

    .menu-toggle {
        display: inline-block;
    }

    .nav {
        display: none;
        position: absolute;
        top: calc(100% + 10px);
        right: 24px;
        left: 24px;
        padding: 12px;
        flex-direction: column;
        align-items: stretch;
        border-radius: 18px;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border: 1px solid rgba(0, 0, 0, 0.08);
        box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1);
    }

    .nav.open {
        display: flex;
    }

    .nav-link {
        border-radius: 12px;
        padding: 14px 16px;
        font-size: 18px;
    }

    .hero {
        min-height: auto;
        padding-top: 120px;
        padding-bottom: 56px;
    }

    .hero-subjects {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .intro-features {
        grid-template-columns: 1fr;
        max-width: 540px;
    }

    .intro-feature {
        padding: 36px 28px;
    }

    .intro-feature-icon {
        width: 56px;
        height: 56px;
        margin-bottom: 20px;
    }

    .intro-feature h3 {
        font-size: 24px;
        margin-bottom: 10px;
    }

    .intro-feature p {
        font-size: 18px;
    }

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

    .courses-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-col {
        align-items: center;
        text-align: center;
    }

    .footer-description {
        max-width: 100%;
    }

    .contact-item {
        justify-content: center;
    }

    .footer-bottom {
        padding-top: 32px;
    }

    .merch-carousel {
        grid-template-columns: 1fr;
    }

    .merch-arrow {
        position: absolute;
        top: 50%;
        z-index: 2;
        transform: translateY(-50%);
        background: rgba(15, 15, 15, 0.8);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
    }

    .merch-arrow:hover {
        transform: translateY(calc(-50% - 2px));
    }

    .merch-arrow-prev {
        left: 12px;
    }

    .merch-arrow-next {
        right: 12px;
    }

    .section {
        padding: 64px 0;
    }

    .footer-shell {
        padding: 64px 0 40px;
    }

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

    .footer-top {
        padding-bottom: 40px;
    }

    .merch-name {
        font-size: clamp(26px, 5vw, 38px);
    }

    .faq-question {
        min-height: 64px;
        padding: 0 20px;
        font-size: 18px;
    }

    .faq-answer p {
        padding: 0 20px;
        font-size: 18px;
    }

    .faq-item.is-open .faq-answer p {
        padding-bottom: 20px;
    }
}

/* --- Large Phone / Small Tablet (≤ 640px) --- */
@media (max-width: 640px) {
    .container,
    .header-container {
        width: calc(100% - 32px);
    }

    .header {
        padding: 12px 0;
    }

    .header.scrolled {
        padding: 10px 0;
    }

    .btn-large {
        min-height: 52px; /* Touch-friendly */
        font-size: 17px;
    }

    .hero {
        padding-top: 100px;
        padding-bottom: 40px;
    }

    .hero-title {
        font-size: clamp(30px, 8vw, 42px);
        white-space: normal;
        text-wrap: balance;
    }

    .hero-subtitle {
        font-size: 18px;
        margin-bottom: 28px;
    }

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

    .hero-stats-bar {
        display: flex;
        justify-content: space-around;
        padding: 18px 16px;
        gap: 8px;
    }

    .hero-stat-divider {
        display: none;
    }

    .courses-grid {
        grid-template-columns: 1fr; /* Stack on mobile */
        gap: 20px;
    }

    .video-card.featured {
        grid-template-columns: 1fr;
    }
}

/* --- Small Phone (≤ 480px) --- */
@media (max-width: 480px) {
    html {
        font-size: 17px;
    }

    .section {
        padding: 48px 0;
    }

    .section-header {
        margin-bottom: 28px;
    }

    .intro-features {
        max-width: 100%;
        gap: 20px;
    }

    .intro-feature {
        padding: 32px 20px;
    }

    .intro-feature-icon {
        width: 48px;
        height: 48px;
        margin-bottom: 16px;
    }

    .intro-feature h3 {
        font-size: 22px;
    }

    .intro-feature p {
        font-size: 17px;
    }

    .hero-subjects {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .hero-stats-bar {
        padding: 16px;
        gap: 0;
    }

    .hero-stat-number {
        font-size: 26px;
    }

    .hero-stat-plus {
        font-size: 18px;
    }

    .hero-stat-label {
        font-size: 14px;
    }

    .logo-text {
        font-size: 18px;
    }

    .footer-links-wrap {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .section-title {
        font-size: 30px;
    }

    .hero-badge {
        font-size: 14px;
        padding: 4px 12px;
    }

    .footer-grid {
        gap: 32px;
    }



    .course-image {
        height: 100%;
    }

    .video-info,
    .merch-info {
        padding: 18px;
    }

    .video-title,
    .course-title {
        font-size: 20px;
    }

    .video-card:not(.featured) .video-title {
        font-size: 19px;
    }

    .merch-name {
        font-size: 24px;
    }

    .merch-desc {
        font-size: 17px;
        margin-top: 10px;
    }

    .course-content {
        padding: 16px;
    }

    .course-desc {
        font-size: 17px;
        margin-top: 10px;
    }

    .course-price,
    .merch-price {
        font-size: 20px;
    }

    .qr-modal-container {
        max-width: 100vw;
        border-radius: 0;
        min-height: 100dvh;
    }

    .qr-modal {
        padding: 0;
    }

    .qr-image-wrapper {
        width: 200px;
        height: 200px;
    }

    .qr-instructions {
        font-size: 17px;
        padding: 12px;
    }

    .faq-question {
        min-height: 56px;
        padding: 0 16px;
        font-size: 17px;
    }

    .faq-answer p {
        padding: 0 16px;
        font-size: 17px;
    }

    .faq-item.is-open .faq-answer p {
        padding-bottom: 16px;
    }

    .footer-logo {
        font-size: 22px;
    }

    .footer-socials {
        gap: 8px;
    }

    .social-icon {
        width: 36px;
        height: 36px;
    }
}

/* --- Tiny Phone (≤ 360px - iPhone SE) --- */
@media (max-width: 360px) {
    .container,
    .header-container {
        width: calc(100% - 24px);
    }

    .hero {
        padding-top: 90px;
        padding-bottom: 32px;
    }

    .hero-title {
        font-size: 26px;
    }

    .hero-subtitle {
        font-size: 16px;
        margin-bottom: 20px;
    }

    .hero-badge {
        font-size: 13px;
        padding: 3px 10px;
        margin-bottom: 20px;
    }

    .hero-stat-number {
        font-size: 24px;
    }

    .hero-stat-plus {
        font-size: 16px;
    }

    .hero-stats-bar {
        padding: 12px 10px;
        margin-bottom: 32px;
    }

    .hero-actions {
        gap: 8px;
    }

    .btn-large {
        min-height: 46px;
        padding: 0 14px;
        font-size: 16px;
    }

    .hero-subject {
        padding: 14px;
        gap: 12px;
    }

    .hero-subject strong {
        font-size: 16px;
    }

    .hero-subject-desc {
        font-size: 16px;
    }

    .hero-subject-icon {
        width: 34px;
        height: 34px;
    }

    .section {
        padding: 36px 0;
    }

    .section-title {
        font-size: 26px;
    }

    .section-desc {
        font-size: 16px;
    }

    .header-actions .btn-primary {
        display: none;
    }

    .header-actions .hide-mobile.btn-secondary {
        display: none;
    }

    .logo-lockup .logo-meta {
        display: none;
    }

    .video-info,
    .merch-info {
        padding: 14px;
    }

    .video-duration {
        font-size: 14px;
        min-height: 24px;
        padding: 0 8px;
    }

    .video-play {
        width: 48px;
        height: 48px;
    }

    .small-play {
        width: 40px;
        height: 40px;
    }

    .merch-name {
        font-size: 22px;
    }

    .merch-card {
        min-height: auto;
    }

    .merch-image {
        min-height: 220px;
    }


}

/* --- Safe Area for Notched Devices (iPhone X+) --- */
@supports (padding: env(safe-area-inset-bottom)) {


    .qr-modal {
        padding-bottom: env(safe-area-inset-bottom);
    }

    .nav.open {
        max-height: calc(100vh - env(safe-area-inset-top) - 100px);
        overflow-y: auto;
    }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .video-card,
    .merch-card,
    .course-card,
    .btn,
    .merch-arrow,
    .faq-item,
    .faq-answer {
        transition: none;
    }

    .badge-hot {
        animation: none;
    }

    .merch-track {
        transition: none;
    }

    html {
        scroll-behavior: auto;
    }
}

/* --- Hover-capable Devices Only --- */
@media (hover: hover) and (pointer: fine) {

    .video-card:hover,
    .merch-card:hover {
        transform: translateY(-4px);
    }

    .course-card:hover {
        transform: translateY(-6px) scale(1.01);
    }
}

/* === ANIMATIONS & REVEALS === */
.reveal {
    opacity: 0;
    transform: translateY(24px) scale(0.98);
    transition: opacity var(--duration-lg) var(--ease-out-expo), transform var(--duration-lg) var(--ease-out-expo);
    pointer-events: none;
    will-change: transform, opacity;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

/* Staggered Children Support */
.stagger-parent .reveal {
    transition-delay: calc(var(--stagger-index, 0) * 80ms);
}

/* Specific Reveal Types */
.reveal-mask {
    overflow: hidden;
}

.reveal-mask > * {
    opacity: 0;
    transform: translateY(100%);
    transition: opacity var(--duration-lg) var(--ease-out-expo), transform var(--duration-lg) var(--ease-out-expo);
    will-change: transform, opacity;
}

.reveal-mask.visible > * {
    opacity: 1;
    transform: translateY(0);
}

.reveal-fade {
    transform: none;
}

.reveal-scale {
    transform: scale(0.94);
}

.reveal-left {
    transform: translateX(-32px);
}

.reveal-right {
    transform: translateX(32px);
}

/* Stagger indices for CSS-only simple staggers if needed */
.stagger-1 { --stagger-index: 1; }
.stagger-2 { --stagger-index: 2; }
.stagger-3 { --stagger-index: 3; }
.stagger-4 { --stagger-index: 4; }
.stagger-5 { --stagger-index: 5; }

/* Interactive Hover States */
.hover-premium {
    transition: transform var(--duration-md) var(--ease-premium), box-shadow var(--duration-md) var(--ease-premium), border-color var(--duration-md) var(--ease-premium);
}

.hover-premium:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 24px 48px rgba(1, 1, 32, 0.08);
}

/* Premium Background Gradients */
.bg-atmosphere {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.bg-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
}

.bg-glow-emerald { background: radial-gradient(circle, var(--accent) 0%, transparent 70%); }
.bg-glow-pink { background: radial-gradient(circle, var(--pastel-pink) 0%, transparent 70%); }
.bg-glow-lavender { background: radial-gradient(circle, var(--pastel-lavender) 0%, transparent 70%); }

/* === Touch Devices (no hover) === */
@media (hover: none) {

    .video-card:hover,
    .merch-card:hover {
        transform: none;
        box-shadow: none;
    }

    .course-card:hover {
        transform: none;
    }

    .course-card:hover::before {
        opacity: 0;
    }

    .merch-card:hover .merch-image::before {
        opacity: 0;
    }

    .merch-card:hover .merch-image img {
        transform: none;
        filter: none;
    }
}

/* === MENU TOGGLE === */
.menu-toggle.active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

/* === FAQ === */
.section-faq {
    background: linear-gradient(180deg, #ffffff 0%, #f9f9f9 100%);
    border-top: 1px solid var(--light-border);
}

.faq-accordion {
    display: grid;
    gap: 12px;
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: #ffffff;
    border: 1px solid var(--light-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.faq-item:hover,
.faq-item.is-open {
    border-color: var(--accent-strong);
    box-shadow: 0 18px 42px rgba(1, 1, 32, 0.07);
}

.faq-question {
    width: 100%;
    min-height: 72px;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    border: 0;
    background: transparent;
    text-align: left;
    cursor: pointer;
    font-size: 20px;
    font-weight: 800;
    color: var(--light-text);
}

.faq-answer {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows var(--transition);
}

.faq-answer p {
    min-height: 0;
    overflow: hidden;
    padding: 0 24px;
    font-size: 19px;
    line-height: 1.6;
    color: var(--light-text-secondary);
}

.faq-item.is-open .faq-answer {
    grid-template-rows: 1fr;
}

.faq-item.is-open .faq-answer p {
    padding-bottom: 24px;
}

.faq-icon {
    position: relative;
    flex: 0 0 auto;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1px solid var(--light-border);
}

.faq-icon::before,
.faq-icon::after {
    content: '';
    position: absolute;
    inset: 50% auto auto 50%;
    width: 10px;
    height: 2px;
    background: var(--light-text);
    transform: translate(-50%, -50%);
}

.faq-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
    transition: opacity var(--transition);
}

.faq-item.is-open .faq-icon::after {
    opacity: 0;
}

/* === QR MODAL === */
.qr-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.qr-modal.active {
    display: flex;
}

.qr-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: modal-fade-in 300ms ease-out;
}

.qr-modal-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 520px;
    background: var(--light-canvas);
    border-radius: var(--radius-lg);
    box-shadow: 0 32px 64px rgba(0, 0, 0, 0.25);
    border: 1px solid var(--light-border-strong);
    animation: modal-slide-up 350ms cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

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

.qr-modal-header h3 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.qr-modal-close {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--light-text-secondary);
    transition: color var(--transition);
    padding: 4px;
    border-radius: 6px;
}

.qr-modal-close:hover {
    color: var(--light-text);
    background: var(--light-surface);
}

.qr-modal-body {
    padding: 24px;
    text-align: center;
}

#payment-course-title {
    font-weight: 600;
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--accent-strong);
}

.qr-image-wrapper {
    position: relative;
    width: 400px;
    max-width: 100%;
    height: auto;
    min-height: 400px;
    margin: 0 auto 32px;
    background: #fff;
    border: 1px solid var(--light-border);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

#payment-qr-image {
    width: 100%;
    height: auto;
    display: block;
}

/* === REGISTRATION FORM === */
.registration-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

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

.form-group label {
    font-size: 16px;
    font-weight: 600;
    color: var(--light-text);
}

.form-group .required {
    color: #ff4b4b;
}

.form-group input[type="text"],
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--light-border);
    border-radius: var(--radius-sm);
    background: #fff;
    font-family: inherit;
    font-size: 17px;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(62, 207, 142, 0.1);
}

.radio-group,
.checkbox-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.radio-label,
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 16px;
    padding: 8px 14px;
    border: 1px solid var(--light-border);
    border-radius: var(--radius-pill);
    background: #fff;
    transition: all var(--transition);
}

.radio-label:has(input:checked),
.checkbox-label:has(input:checked) {
    background: rgba(62, 207, 142, 0.08);
    border-color: var(--accent);
    color: var(--accent-strong);
}

.radio-label input,
.checkbox-label input {
    cursor: pointer;
}

.registration-footer {
    margin-top: 12px;
    padding-top: 24px;
    border-top: 1px solid var(--light-border);
}

@media (max-width: 640px) {
    .form-grid-2col {
        grid-template-columns: 1fr;
    }
}

#payment-qr-image {
    max-width: 100%;
    max-height: 100%;
    transition: opacity 300ms ease;
    opacity: 0;
}

#payment-qr-image.loaded {
    opacity: 1;
}

.qr-loading-spinner {
    position: absolute;
    width: 32px;
    height: 32px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

#payment-qr-image.loaded+.qr-loading-spinner {
    display: none;
}

.qr-instructions {
    text-align: left;
    background: var(--light-surface);
    padding: 16px;
    border-radius: var(--radius-sm);
    font-size: 16px;
}

.qr-instructions p {
    margin-bottom: 8px;
}

.qr-instructions p:last-child {
    margin-bottom: 0;
}

.qr-modal-footer {
    padding: 20px 24px;
    background: #fafafa;
    border-top: 1px solid var(--light-border);
}

.btn-full {
    width: 100%;
}

@keyframes modal-fade-in {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes modal-slide-up {
    from {
        transform: translateY(24px) scale(0.96);
        opacity: 0;
    }

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

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

/* Aurora & Orb Animations */
@keyframes aurora-drift {
    0% { transform: translate(0, 0) scale(1); opacity: 0.3; }
    33% { transform: translate(4%, 3%) scale(1.1); opacity: 0.5; }
    66% { transform: translate(-2%, 5%) scale(0.9); opacity: 0.4; }
    100% { transform: translate(0, 0) scale(1); opacity: 0.3; }
}

@keyframes aurora-drift-2 {
    0% { transform: translate(0, 0) scale(1); opacity: 0.2; }
    50% { transform: translate(-3%, -4%) scale(1.15); opacity: 0.4; }
    100% { transform: translate(0, 0) scale(1); opacity: 0.2; }
}

@keyframes float-orb-1 {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(20px, -40px) rotate(360deg); }
}

@keyframes float-orb-2 {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(-30px, 20px) rotate(-360deg); }
}

@keyframes float-orb-3 {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(40px, 30px) rotate(180deg); }
}

@keyframes grain-shift {
    0%, 100% { transform: translate(0, 0); }
    10% { transform: translate(-1%, -1%); }
    20% { transform: translate(-2%, 1%); }
    30% { transform: translate(1%, -2%); }
    40% { transform: translate(-1%, 2%); }
    50% { transform: translate(-2%, -1%); }
    60% { transform: translate(2%, 1%); }
    70% { transform: translate(1%, 2%); }
    80% { transform: translate(-1%, -2%); }
    90% { transform: translate(2%, -1%); }
}

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

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.6;
}



@media (prefers-reduced-motion: reduce) {
    .reveal, .reveal-mask > *, .hero-orb, .hero-glow {
        animation: none !important;
        transition: none !important;
        opacity: 1 !important;
        transform: none !important;
    }
}

/* === ULTRA-WIDE & 4K SCALING === */
/* Kỹ thuật Scaling giúp giao diện lấp đầy và sang trọng hơn trên màn hình lớn (27" trở lên) */
@media (min-width: 1440px) {
    html {
        font-size: 19px;
    }

    :root {
        --container: 1400px;
    }
}

@media (min-width: 1920px) {
    html {
        font-size: 20px; /* Tăng tỉ lệ hệ thống lên ~12% */
    }

    :root {
        --container: 1600px; /* Mở rộng không gian hiển thị */
    }
}

@media (min-width: 2560px) {
    html {
        font-size: 22px; /* Tăng tỉ lệ hệ thống lên ~25% cho màn hình 4K */
    }

    :root {
        --container: 1800px; /* Tối ưu hóa cho các màn hình Ultra-wide cực lớn */
    }
}

/* === COURSE CARD REFINEMENT === */
.course-card {
    display: flex;
    flex-direction: column;
    text-align: center;
    background: var(--light-canvas);
    border: 1px solid var(--light-border-soft);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.course-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

.course-content {
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-grow: 1;
}

.course-meta {
    justify-content: center;
    margin-bottom: 16px;
    gap: 12px;
}

.course-title {
    font-size: 24px;
    margin-bottom: 12px;
    line-height: 1.3;
}

.course-desc {
    margin-bottom: 24px;
    font-size: 17px;
    color: var(--light-text-muted);
    line-height: 1.6;
    max-width: 280px;
}

.course-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 100%;
    margin-top: auto;
    padding-top: 24px;
    border-top: 1px solid var(--light-border-soft);
}

.course-price {
    font-size: 15px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-strong);
}

.course-link, .video-link {
    width: 100%;
    max-width: 200px;
    justify-content: center;
    padding: 12px 24px !important;
}

/* === COURSE GLASS EFFECTS === */
.glass-effect, .glass-effect-alt {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.glass-effect {
    background: linear-gradient(135deg, #3ecf8e 0%, #2eaf7d 100%);
}

.glass-effect-alt {
    background: linear-gradient(135deg, #7000ff 0%, #4d00b3 100%);
}

.glass-effect::before, .glass-effect-alt::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.2) 0%, transparent 60%);
}

.course-icon {
    font-size: 88px;
    filter: drop-shadow(0 12px 24px rgba(0,0,0,0.15));
    z-index: 1;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.course-card:hover .course-icon {
    transform: scale(1.15) rotate(5deg);
}

.registration-form .form-grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 600px) {
    .registration-form .form-grid-2col {
        grid-template-columns: 1fr;
    }
}