/* Premium Design System - Chungde Static Site */
:root {
    --primary: #1a1a2e;
    --accent: #c9a84c;
    --accent-light: #e8d5a3;
    --text: #2d2d2d;
    --text-light: #6b6b6b;
    --bg: #fafafa;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}

/* Nav */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(20px);
    z-index: 1000;
    padding: 0 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
    border-bottom: 1px solid rgba(201, 168, 76, 0.2);
}

.nav-brand {
    font-size: 24px;
    font-weight: 700;
    color: var(--white);
    text-decoration: none;
    letter-spacing: 2px;
}

.nav-brand span { color: var(--accent); }

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: color 0.3s;
}

.nav-links a:hover, .nav-links a.active { color: var(--accent); }

.lang-switch {
    display: flex;
    gap: 8px;
    margin-left: 20px;
    padding-left: 20px;
    border-left: 1px solid rgba(255,255,255,0.2);
}

.lang-btn {
    padding: 6px 12px;
    border: 1px solid rgba(201, 168, 76, 0.4);
    border-radius: 4px;
    color: var(--accent-light);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

.lang-btn:hover, .lang-btn.active {
    background: var(--accent);
    color: var(--primary);
    border-color: var(--accent);
}

/* Hero */
.hero {
    min-height: 100vh;
    background: var(--gradient);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 0 5%;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(201, 168, 76, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
    padding-top: 80px;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(201, 168, 76, 0.15);
    border: 1px solid rgba(201, 168, 76, 0.3);
    border-radius: 50px;
    color: var(--accent-light);
    font-size: 13px;
    margin-bottom: 30px;
    letter-spacing: 1px;
}

.hero h1 {
    font-size: clamp(40px, 6vw, 72px);
    color: var(--white);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero h1 span { color: var(--accent); }

.hero p {
    font-size: 18px;
    color: rgba(255,255,255,0.7);
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    padding: 16px 40px;
    background: var(--accent);
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s;
    letter-spacing: 0.5px;
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(201, 168, 76, 0.3); }

.btn-secondary {
    padding: 16px 40px;
    background: transparent;
    color: var(--white);
    font-weight: 600;
    font-size: 14px;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* Sections */
.section {
    padding: 100px 5%;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(201, 168, 76, 0.1);
    border: 1px solid rgba(201, 168, 76, 0.3);
    border-radius: 50px;
    color: var(--accent);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-light);
    max-width: 500px;
    margin: 0 auto;
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    max-width: 1200px;
    margin: 0 auto;
}

.product-card {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    transition: all 0.4s ease;
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.12);
}

.product-image {
    height: 200px;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
}

.product-icon { font-size: 64px; opacity: 0.8; }

.product-content { padding: 28px; }

.product-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--accent);
    color: var(--primary);
    font-size: 11px;
    font-weight: 600;
    border-radius: 4px;
    margin-bottom: 12px;
}

.product-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.product-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 16px;
    color: var(--accent);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: gap 0.3s;
}

.product-link:hover { gap: 12px; }

/* About Section */
.about-section { background: var(--white); }

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto;
    align-items: center;
}

.about-image {
    height: 400px;
    background: var(--gradient);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
}

.about-content h3 {
    font-size: 28px;
    color: var(--primary);
    margin-bottom: 20px;
}

.about-content p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 32px;
}

.about-feature {
    padding: 20px;
    background: var(--bg);
    border-radius: 12px;
}

.about-feature h4 {
    font-size: 16px;
    color: var(--primary);
    margin-bottom: 8px;
}

.about-feature p { font-size: 13px; color: var(--text-light); }

/* Contact Section */
.contact-section {
    background: var(--primary);
    color: var(--white);
}

.contact-section .section-label { background: rgba(255,255,255,0.1); color: var(--accent-light); border-color: rgba(255,255,255,0.2); }
.contact-section .section-title { color: var(--white); }
.contact-section .section-subtitle { color: rgba(255,255,255,0.6); }

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: 40px 32px;
    text-align: center;
    transition: all 0.3s;
}

.contact-card:hover { background: rgba(255,255,255,0.1); transform: translateY(-4px); }

.contact-icon { font-size: 40px; margin-bottom: 16px; }
.contact-card h4 { font-size: 18px; margin-bottom: 12px; }
.contact-card p { color: rgba(255,255,255,0.7); font-size: 14px; }
.contact-card a { color: var(--accent-light); text-decoration: none; }
.contact-card a:hover { text-decoration: underline; }

/* Footer */
.footer {
    background: #0f0f1a;
    padding: 60px 5% 30px;
    color: rgba(255,255,255,0.6);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand h3 { color: var(--white); font-size: 20px; margin-bottom: 16px; }
.footer-brand h3 span { color: var(--accent); }
.footer-brand p { font-size: 14px; line-height: 1.8; }

.footer-links h4 { color: var(--white); font-size: 14px; margin-bottom: 20px; letter-spacing: 1px; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { color: rgba(255,255,255,0.6); text-decoration: none; font-size: 14px; transition: color 0.3s; }
.footer-links a:hover { color: var(--accent); }

.footer-bottom {
    max-width: 1200px;
    margin: 30px auto 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
}

.footer-bottom a { color: rgba(255,255,255,0.5); text-decoration: none; }
.footer-bottom a:hover { color: var(--accent); }

/* Animations */
.fade-in { opacity: 0; transform: translateY(30px); transition: all 0.8s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero h1 { font-size: 36px; }
    .about-grid { grid-template-columns: 1fr; }
    .about-image { height: 280px; }
    .footer-content { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    .section { padding: 60px 5%; }
}

/* Mobile nav toggle */
.nav-toggle { display: none; color: white; font-size: 24px; cursor: pointer; }
@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .nav-links.active { display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0; background: var(--primary); padding: 20px; gap: 16px; }
}