@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Poppins:wght@300;400;500;600;700;800;900&display=swap');

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #10b981;
    --accent: #f59e0b;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --light: #f8fafc;
    --gray: #94a3b8;
    --success: #22c55e;
    --danger: #ef4444;
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.18);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 6px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 15px 35px rgba(0, 0, 0, 0.2);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--dark);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
    line-height: 1.6;
}

.bg-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
    overflow: hidden;
}

.bg-grid {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0.15;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 40px 40px;
}

.bg-blobs {
    position: absolute;
    width: 100%;
    height: 100%;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.2;
    animation: float 12s ease-in-out infinite;
}

.blob-1 {
    width: 500px;
    height: 500px;
    top: -250px;
    left: -250px;
    background: var(--primary);
    animation-delay: 0s;
}

.blob-2 {
    width: 400px;
    height: 400px;
    top: 50%;
    right: -200px;
    background: var(--secondary);
    animation-delay: 2s;
}

.blob-3 {
    width: 600px;
    height: 600px;
    bottom: -300px;
    left: 30%;
    background: var(--accent);
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg) scale(1); }
    33% { transform: translate(40px, -40px) rotate(120deg) scale(1.1); }
    66% { transform: translate(-30px, 30px) rotate(240deg) scale(0.9); }
}

nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.2rem 0;
    background: none;
    backdrop-filter: blur(22px);
    z-index: 1000;
    transition: var(--transition-fast);
}

nav.scrolled {
    padding: 0.8rem 0;
    background: none;
    
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 2rem;
    font-weight: 900;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
}


.game-text {
    color: var(--primary);
    text-shadow: 0 0 15px rgba(99, 102, 241, 0.5);
}

.lian-text {
    color: var(--secondary);
    text-shadow: 0 0 15px rgba(16, 185, 129, 0.5);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 3rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

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

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

.nav-buttons {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.auth-buttons {
    display: flex;
    gap: 0.8rem;
}

.nav-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    backdrop-filter: blur(20px);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.nav-btn.login-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
}

.nav-btn.login-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}

.nav-btn.register-btn {
    background: var(--primary);
}

.nav-btn.register-btn:hover {
    background: var(--primary-dark);
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.mobile-menu {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 1001;
}

.floating-menu-btn {
    display: none;
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 999;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-fast);
}

.floating-menu-btn:hover {
    transform: scale(1.1) rotate(90deg);
    background: var(--primary-dark);
}

.mobile-nav-panel {
    position: fixed;
    top: 0;
    right: -100%;
    width: 85%;
    height: 100vh;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(20px);
    z-index: 1002;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 1px solid var(--glass-border);
}

.mobile-nav-panel.active {
    right: 0;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.close-panel {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.close-panel:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: rotate(90deg);
}

.mobile-nav-links {
    list-style: none;
    margin-bottom: 2rem;
}

.mobile-nav-links li {
    margin-bottom: 1.5rem;
}

.mobile-nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    display: block;
    padding: 0.8rem 1rem;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.mobile-nav-links a:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(10px);
}

.mobile-auth-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: -30px;
}

.mobile-auth-btn {
    padding: 1rem;
    border-radius: var(--radius-lg);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 600;
    transition: var(--transition-fast);
    font-size: 0.7rem;
}

.mobile-auth-btn.login-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.mobile-auth-btn.login-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}

.mobile-auth-btn.register-btn {
    background: var(--primary);
    color: white;
}

.mobile-auth-btn.register-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 900px;
    z-index: 2;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1.2rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 2rem;
    backdrop-filter: blur(20px);
    animation: slideDown 1s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
}



@keyframes textShine {
    0% { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: 1.4rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-weight: 400;
    line-height: 1.6;
    animation: slideUp 1s cubic-bezier(0.4, 0, 0.2, 1) 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: slideUp 1s cubic-bezier(0.4, 0, 0.2, 1) 0.6s both;
}
.hero::before {
  content: "";
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
  opacity: 0.3;
  filter: blur(80px);
  animation: pulseGlow 6s infinite alternate;
  z-index: -1;
}

@keyframes pulseGlow {
  0% { transform: translateX(-50%) scale(1); opacity: 0.3; }
  100% { transform: translateX(-50%) scale(1.2); opacity: 0.5; }
}


.btn {
    padding: 1.2rem 2.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: inherit;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: var(--shadow-md);
    animation: pulse 2s infinite;
}
.btn-primary2 {
    background: var(--primary);
    color: white;
    box-shadow: var(--shadow-md);
    animation: pulse 2s infinite;
    align-items: center;
    text-align: center;
    display: flex;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(99, 102, 241, 0); }
    100% { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0); }
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 255, 255, 0.3);
}

.features {
    padding: 8rem 2rem;
    position: relative;
}

.features-container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.course-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    backdrop-filter: blur(20px);
    transition: var(--transition-slow);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, var(--primary), transparent);
    opacity: 0;
    transition: var(--transition-slow);
    z-index: -1;
}

.course-card:hover::before {
    opacity: 0.1;
}

.course-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 255, 255, 0.3);
}

.course-icon {
    width: 80px;
    height: 80px;
    background: var(--primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-fast);
}

.course-card:hover .course-icon {
    transform: scale(1.1) rotate(5deg);
}

.course-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.course-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    flex-grow: 1;
}

.course-price {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--secondary);
    margin-bottom: 1.5rem;
}

.course-btn {
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    padding: 1rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    backdrop-filter: blur(20px);
    transition: var(--transition-fast);
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.course-btn:hover {
    background: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.stats {
    padding: 6rem 2rem;
    text-align: center;
    background: rgba(0, 0, 0, 0.3);
    position: relative;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.stat-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    backdrop-filter: blur(20px);
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
}

.stat-item:hover::before {
    transform: scaleX(1);
}

.stat-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--primary);
    display: block;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

footer {
    padding: 4rem 2rem 2rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 4rem;
    background: rgba(0, 0, 0, 0.2);
}

.footer-content {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.footer-content .logo {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    justify-content: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin: 2rem 0;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--secondary);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: 1.2rem;
    transition: var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.scroll-indicator {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 25px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 8px;
    animation: bounce 2s infinite;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.scroll-indicator::before {
    content: '';
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

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

@keyframes scroll {
    0% { opacity: 0; transform: translateY(0); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: translateY(12px); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@media (max-width: 968px) {
    .auth-buttons {
        display: none;
    }
    
    .floating-menu-btn {
        display: flex;
    }
    
    .nav-links { 
        display: none;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 969px) {
    .mobile-nav-panel {
        display: none;
    }
    
    .floating-menu-btn {
        display: none;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 2.8rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

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

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

.nav-buttons {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    backdrop-filter: blur(20px);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-btn:hover {
    background: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.mobile-menu {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 1001;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 900px;
    z-index: 2;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1.2rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 2rem;
    backdrop-filter: blur(20px);
    animation: slideDown 1s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
}

.hero h1 {
    font-size: clamp(3.5rem, 10vw, 7rem);
    font-weight: 900;
    line-height: 0.95;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
    animation: slideUp 1s cubic-bezier(0.4, 0, 0.2, 1) 0.2s both;
    text-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.4rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-weight: 400;
    line-height: 1.6;
    animation: slideUp 1s cubic-bezier(0.4, 0, 0.2, 1) 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: slideUp 1s cubic-bezier(0.4, 0, 0.2, 1) 0.6s both;
}

.btn {
    padding: 1.2rem 2.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: inherit;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 255, 255, 0.3);
}

.features {
    padding: 8rem 2rem;
    position: relative;
}

.features-container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.course-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    backdrop-filter: blur(20px);
    transition: var(--transition-slow);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.course-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 255, 255, 0.3);
}

.course-icon {
    width: 80px;
    height: 80px;
    background: var(--primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-fast);
}

.course-card:hover .course-icon {
    transform: scale(1.1) rotate(5deg);
}

.course-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.course-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    flex-grow: 1;
}

.course-price {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--secondary);
    margin-bottom: 1.5rem;
}

.course-btn {
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    padding: 1rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    backdrop-filter: blur(20px);
    transition: var(--transition-fast);
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.course-btn:hover {
    background: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.stats {
    padding: 6rem 2rem;
    text-align: center;
    background: rgba(0, 0, 0, 0.3);
    position: relative;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.stat-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    backdrop-filter: blur(20px);
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
}

.stat-item:hover::before {
    transform: scaleX(1);
}

.stat-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--primary);
    display: block;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

footer {
    padding: 4rem 2rem 2rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 4rem;
    background: rgba(0, 0, 0, 0.2);
}

.footer-content {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.footer-content .logo {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    justify-content: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin: 2rem 0;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--secondary);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: 1.2rem;
    transition: var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.scroll-indicator {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 25px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 8px;
    animation: bounce 2s infinite;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.scroll-indicator::before {
    content: '';
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

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

@keyframes scroll {
    0% { opacity: 0; transform: translateY(0); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: translateY(12px); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@media (max-width: 968px) {
    .nav-links { 
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: rgba(15, 23, 42, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right 0.4s ease;
        z-index: 1000;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .mobile-menu { 
        display: block; 
        z-index: 1001;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 2.8rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
}

/* Default (desktop) */
.logo-circle {
  width: 55px;
  height: 55px;
  border-radius: 50%;
  background: var(--secondary);
  text-shadow: 0 0 15px rgba(16, 185, 129, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: white;
  font-size: 1.3rem;
  animation: colorShift 6s infinite alternate ease-in-out, rotateGlow 12s infinite linear;
  box-shadow: 0 0 25px rgba(0,0,0,0.25);
  margin-left: auto; /* pushes to the right */
  cursor: pointer;
  transition: transform 0.3s ease;
}

.logo-circle:hover {
  transform: scale(1.15) rotate(5deg);
}

@keyframes colorShift {
 
}

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

@keyframes plop {
  0%   { transform: scale(0.8) translateY(0); }
  40%  { transform: scale(1.2) translateY(-10px); }
  60%  { transform: scale(0.95) translateY(0); }
  100% { transform: scale(1) translateY(-6px); }
}

/* 📱 Mobile view fix */
@media (max-width: 768px) {
  .logo-circle {
    position: absolute;
    top: 15%;          /* vertical center */
    right: 15px;       /* a little spacing from right edge */
    transform: translateY(-50%);  /* perfectly centered vertically */
    animation: plop 1.5s ease-in-out infinite, colorShift 6s infinite alternate ease-in-out;
  }
}