/* ========================================
   SparkU - The University of Super Individuals
   Premium Dark Theme with Neon Accents
======================================== */

/* CSS Variables */
:root {
    /* Primary Colors */
    --bg-primary: #0E1118;
    --bg-secondary: #141A26;
    --bg-card: #1F2636;
    --bg-elevated: #2E3A59;
    
    /* Accent Colors - Neon Spark */
    --accent-primary: #38D7C8;
    --accent-secondary: #68ECE0;
    --accent-tertiary: #8FFFE6;
    
    /* Typography */
    --text-primary: #FFFFFF;
    --text-secondary: #C9CED9;
    --text-muted: #6B7280;
    
    /* Gradients */
    --gradient-accent: linear-gradient(135deg, #38D7C8 0%, #68ECE0 50%, #8FFFE6 100%);
    --gradient-glow: radial-gradient(ellipse at center, rgba(56, 215, 200, 0.15) 0%, transparent 70%);
    --gradient-card: linear-gradient(145deg, rgba(46, 58, 89, 0.4) 0%, rgba(31, 38, 54, 0.4) 100%);
    
    /* Spacing */
    --section-padding: 120px;
    --container-max: 1200px;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-glow: 0 0 40px rgba(56, 215, 200, 0.3);
    --shadow-card: 0 4px 30px rgba(0, 0, 0, 0.3);
}

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

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

body {
    font-family: 'Sora', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

/* Utility Classes */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--accent-primary);
    margin-bottom: 16px;
    padding: 8px 16px;
    background: rgba(56, 215, 200, 0.1);
    border-radius: 100px;
    border: 1px solid rgba(56, 215, 200, 0.2);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 24px;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   Navigation
======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    background: rgba(14, 17, 24, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(56, 215, 200, 0.1);
    transition: var(--transition-medium);
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(14, 17, 24, 0.95);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: 'Outfit', sans-serif;
    font-size: 1.75rem;
    font-weight: 800;
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo-spark {
    color: var(--text-primary);
}

.logo-u {
    color: var(--accent-primary);
    text-shadow: 0 0 20px rgba(56, 215, 200, 0.5);
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: var(--transition-fast);
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-links a:hover::after {
    width: 100%;
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(56, 215, 200, 0.1);
    border: 1px solid rgba(56, 215, 200, 0.3);
    border-radius: 100px;
    color: var(--accent-primary);
    font-family: 'Sora', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.lang-toggle:hover {
    background: rgba(56, 215, 200, 0.2);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.lang-icon {
    font-size: 1rem;
}

/* ========================================
   Hero Section
======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 24px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

/* Animated Spark Rings */
.spark-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    border-radius: 50%;
    border: 1px solid rgba(56, 215, 200, 0.2);
    animation: pulse-ring 4s ease-in-out infinite;
}

.spark-ring::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, transparent, var(--accent-primary), transparent);
    mask: radial-gradient(farthest-side, transparent calc(100% - 3px), white calc(100% - 2px));
    -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 3px), white calc(100% - 2px));
    animation: spin 8s linear infinite;
}

.spark-ring-2 {
    width: 800px;
    height: 800px;
    animation-delay: -1s;
    opacity: 0.6;
}

.spark-ring-2::before {
    animation-direction: reverse;
    animation-duration: 12s;
}

.spark-ring-3 {
    width: 1000px;
    height: 1000px;
    animation-delay: -2s;
    opacity: 0.3;
}

@keyframes pulse-ring {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.5;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.05);
        opacity: 1;
    }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Particles Background */
.particles {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(2px 2px at 20% 30%, rgba(56, 215, 200, 0.3) 0%, transparent 100%),
        radial-gradient(2px 2px at 40% 70%, rgba(104, 236, 224, 0.2) 0%, transparent 100%),
        radial-gradient(2px 2px at 80% 40%, rgba(143, 255, 230, 0.3) 0%, transparent 100%),
        radial-gradient(2px 2px at 60% 80%, rgba(56, 215, 200, 0.2) 0%, transparent 100%),
        radial-gradient(2px 2px at 30% 50%, rgba(104, 236, 224, 0.3) 0%, transparent 100%),
        radial-gradient(2px 2px at 70% 20%, rgba(143, 255, 230, 0.2) 0%, transparent 100%),
        radial-gradient(1px 1px at 90% 60%, rgba(56, 215, 200, 0.4) 0%, transparent 100%),
        radial-gradient(1px 1px at 10% 90%, rgba(104, 236, 224, 0.3) 0%, transparent 100%);
    background-size: 100% 100%;
    animation: float-particles 20s ease-in-out infinite;
}

@keyframes float-particles {
    0%, 100% { transform: translateY(0) translateX(0); }
    25% { transform: translateY(-20px) translateX(10px); }
    50% { transform: translateY(-10px) translateX(-10px); }
    75% { transform: translateY(-30px) translateX(5px); }
}

/* Hero Content */
.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.1;
    animation: fade-up 1s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fade-up 1s ease-out 0.4s both;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fade-up 1s ease-out 0.6s both;
}

@keyframes fade-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    font-family: 'Sora', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 100px;
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--bg-primary);
    box-shadow: 0 4px 30px rgba(56, 215, 200, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 40px rgba(56, 215, 200, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    box-shadow: inset 0 0 20px rgba(56, 215, 200, 0.1);
}

/* Hero Scroll Indicator */
.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    animation: fade-up 1s ease-out 1s both;
}

.hero-scroll span {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--accent-primary), transparent);
    animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
    0%, 100% { opacity: 0.3; height: 60px; }
    50% { opacity: 1; height: 80px; }
}

/* ========================================
   About Section
======================================== */
.about {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(to bottom, var(--bg-primary), transparent);
}

.about .container {
    position: relative;
    text-align: center;
}

.about-text {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ========================================
   Vision, Mission, Values
======================================== */
.vmv {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.vmv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.vmv-card {
    background: var(--gradient-card);
    border: 1px solid rgba(56, 215, 200, 0.1);
    border-radius: 24px;
    padding: 40px;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.vmv-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: var(--transition-fast);
}

.vmv-card:hover {
    transform: translateY(-8px);
    border-color: rgba(56, 215, 200, 0.3);
    box-shadow: var(--shadow-card), 0 0 60px rgba(56, 215, 200, 0.1);
}

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

.vmv-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(56, 215, 200, 0.1);
    border-radius: 16px;
    margin-bottom: 24px;
}

.vmv-icon svg {
    width: 32px;
    height: 32px;
    color: var(--accent-primary);
}

.vmv-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

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

/* ========================================
   What Students Learn
======================================== */
.learn {
    padding: var(--section-padding) 0;
    background: var(--bg-primary);
    position: relative;
}

.learn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: var(--gradient-glow);
    pointer-events: none;
}

.learn .container {
    position: relative;
    text-align: center;
}

.learn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
    margin-top: 60px;
}

.learn-card {
    background: var(--gradient-card);
    border: 1px solid rgba(56, 215, 200, 0.08);
    border-radius: 20px;
    padding: 36px;
    text-align: left;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.learn-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle at top right, rgba(56, 215, 200, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition-medium);
}

.learn-card:hover {
    transform: translateY(-4px);
    border-color: rgba(56, 215, 200, 0.2);
    box-shadow: var(--shadow-card);
}

.learn-card:hover::after {
    opacity: 1;
}

.learn-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(56, 215, 200, 0.2) 0%, rgba(56, 215, 200, 0.05) 100%);
    border-radius: 14px;
    margin-bottom: 20px;
    border: 1px solid rgba(56, 215, 200, 0.2);
}

.learn-icon svg {
    width: 28px;
    height: 28px;
    color: var(--accent-primary);
}

.learn-card h4 {
    font-size: 1.15rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.learn-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   Why SparkU Matters
======================================== */
.why {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.why::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 200%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
}

.why .container {
    text-align: center;
}

.why-statements {
    max-width: 900px;
    margin: 60px auto 0;
}

.why-statement {
    display: flex;
    align-items: center;
    gap: 32px;
    padding: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-medium);
}

.why-statement:last-child {
    border-bottom: none;
}

.why-statement:hover {
    background: rgba(56, 215, 200, 0.03);
    padding-left: 50px;
}

.why-number {
    font-family: 'Outfit', sans-serif;
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.5;
    min-width: 80px;
}

.why-statement:hover .why-number {
    opacity: 1;
}

.why-statement p {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 600;
    text-align: left;
    line-height: 1.4;
}

/* ========================================
   Founder Section
======================================== */
.founder {
    padding: var(--section-padding) 0;
    background: var(--bg-primary);
    position: relative;
}

.founder .container {
    text-align: center;
}

.founders-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-top: 60px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.founder-card {
    background: var(--gradient-card);
    border: 1px solid rgba(56, 215, 200, 0.1);
    border-radius: 24px;
    padding: 48px 36px;
    text-align: center;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.founder-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: var(--transition-fast);
}

.founder-card:hover {
    transform: translateY(-8px);
    border-color: rgba(56, 215, 200, 0.3);
    box-shadow: var(--shadow-card), 0 0 60px rgba(56, 215, 200, 0.1);
}

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

.founder-avatar {
    position: relative;
    width: 140px;
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-elevated);
    border-radius: 50%;
    font-family: 'Outfit', sans-serif;
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin: 0 auto 28px;
    overflow: hidden;
}

.founder-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    position: relative;
    z-index: 1;
}

.avatar-glow {
    position: absolute;
    inset: -15px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(56, 215, 200, 0.2) 0%, transparent 70%);
    animation: pulse 3s ease-in-out infinite;
}

.avatar-ring {
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    border: 2px solid rgba(56, 215, 200, 0.3);
    animation: spin 20s linear infinite;
}

.avatar-ring::before {
    content: '';
    position: absolute;
    top: -3px;
    left: 50%;
    width: 6px;
    height: 6px;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 15px var(--accent-primary);
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

.founder-name {
    font-size: 1.75rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.founder-bio {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 28px;
}

.founder-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.founder-tags span {
    padding: 6px 16px;
    background: rgba(56, 215, 200, 0.1);
    border: 1px solid rgba(56, 215, 200, 0.2);
    border-radius: 100px;
    font-size: 0.8rem;
    color: var(--accent-secondary);
    font-weight: 500;
}

/* ========================================
   Campus Collaboration
======================================== */
.campus {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.campus-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.campus-info {
    max-width: 500px;
}

.campus-list {
    list-style: none;
    margin: 32px 0 40px;
}

.campus-list li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 16px;
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
}

.campus-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-primary);
}

.campus-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.campus-pattern {
    position: relative;
    width: 400px;
    height: 400px;
}

.pattern-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    border: 2px solid rgba(56, 215, 200, 0.2);
    border-radius: 50%;
    animation: pulse-ring 4s ease-in-out infinite;
}

.pattern-ring-2 {
    width: 350px;
    height: 350px;
    border-style: dashed;
    animation-delay: -2s;
    animation-direction: reverse;
}

.pattern-dots {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(4px 4px at 50% 20%, var(--accent-primary) 0%, transparent 100%),
        radial-gradient(4px 4px at 80% 50%, var(--accent-secondary) 0%, transparent 100%),
        radial-gradient(4px 4px at 20% 80%, var(--accent-tertiary) 0%, transparent 100%),
        radial-gradient(4px 4px at 30% 40%, var(--accent-primary) 0%, transparent 100%),
        radial-gradient(4px 4px at 70% 70%, var(--accent-secondary) 0%, transparent 100%);
    animation: float-particles 15s ease-in-out infinite;
}

/* ========================================
   Footer
======================================== */
.footer {
    padding: 80px 0 40px;
    background: var(--bg-primary);
    border-top: 1px solid rgba(56, 215, 200, 0.1);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    margin-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

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

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-col h5 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 12px;
    transition: var(--transition-fast);
}

.footer-col a:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ========================================
   Scroll Animations
======================================== */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Responsive Design
======================================== */
@media (max-width: 1024px) {
    .founders-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
    }
    
    .campus-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .campus-info {
        max-width: none;
        text-align: center;
    }
    
    .campus-list {
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
        text-align: left;
    }
    
    .campus-visual {
        order: -1;
    }
    
    .campus-pattern {
        width: 300px;
        height: 300px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }
    
    .nav-links {
        display: none;
    }
    
    .spark-ring {
        width: 350px;
        height: 350px;
    }
    
    .spark-ring-2 {
        width: 450px;
        height: 450px;
    }
    
    .spark-ring-3 {
        width: 550px;
        height: 550px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .vmv-grid {
        grid-template-columns: 1fr;
    }
    
    .learn-grid {
        grid-template-columns: 1fr;
    }
    
    .why-statement {
        flex-direction: column;
        text-align: center;
        gap: 16px;
        padding: 32px 20px;
    }
    
    .why-statement:hover {
        padding-left: 20px;
    }
    
    .why-statement p {
        text-align: center;
    }
    
    .founder-avatar {
        width: 120px;
        height: 120px;
        font-size: 2.5rem;
    }
    
    .founder-card {
        padding: 36px 24px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 40px;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .lang-toggle .lang-text {
        display: none;
    }
    
    .lang-toggle {
        padding: 10px 14px;
    }
    
    .learn-grid {
        grid-template-columns: 1fr;
    }
    
    .learn-card {
        padding: 28px;
    }
}

/* ========================================
   Language Transition
======================================== */
[data-en], [data-zh] {
    transition: opacity 0.3s ease;
}

body.lang-switching [data-en],
body.lang-switching [data-zh] {
    opacity: 0;
}