/* กำไลหยกไทย - Landing Page */
:root {
    --jade-50: #f0fdf4;
    --jade-100: #dcfce7;
    --jade-200: #bbf7d0;
    --jade-300: #86efac;
    --jade-400: #4ade80;
    --jade-500: #22c55e;
    --jade-600: #16a34a;
    --jade-700: #15803d;
    --jade-800: #166534;
    --jade-900: #14532d;
    --gold: #d4af37;
    --gold-dark: #b8960c;
    --text: #1a1a1a;
    --text-muted: #4a5568;
    --bg: #fafaf9;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Sarabun', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--jade-800) 0%, var(--jade-900) 100%);
    color: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'Prompt', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
}

.nav a {
    color: rgba(255,255,255,0.9);
    text-decoration: none;
    margin-left: 1.5rem;
    transition: color 0.2s;
}

.nav a:hover {
    color: var(--gold);
}

/* Hero */
.hero {
    position: relative;
    padding: 4rem 0;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(240,253,244,0.88) 0%, rgba(250,250,249,0.92) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-family: 'Prompt', sans-serif;
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--jade-800);
    margin-bottom: 0.75rem;
}

.hero-sub {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.cta-btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--jade-600), var(--jade-700));
    color: white;
    padding: 0.875rem 2rem;
    border-radius: 9999px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(22, 163, 74, 0.4);
}

.cta-line {
    background: linear-gradient(135deg, #06c755, #00b900);
}

/* Benefits */
.benefits {
    padding: 4rem 0;
}

.benefits h2,
.products h2,
.contact h2 {
    font-family: 'Prompt', sans-serif;
    text-align: center;
    font-size: 1.75rem;
    color: var(--jade-800);
    margin-bottom: 2rem;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.benefit-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    text-align: center;
    border: 1px solid var(--jade-100);
}

.benefit-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.benefit-card h3 {
    font-family: 'Prompt', sans-serif;
    color: var(--jade-700);
    margin-bottom: 0.5rem;
}

.benefit-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Products */
.products {
    padding: 4rem 0;
    background: var(--jade-50);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.product-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    transition: transform 0.2s, box-shadow 0.2s;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.product-img {
    height: 200px;
    background: var(--jade-100);
    overflow: hidden;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.product-card h3 {
    font-family: 'Prompt', sans-serif;
    padding: 1rem 1rem 0;
    color: var(--jade-800);
    font-size: 1.1rem;
}

.price {
    padding: 0.5rem 1rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--jade-600);
}

.product-card .btn {
    display: block;
    margin: 0 1rem 1rem;
    padding: 0.75rem;
    background: var(--jade-600);
    color: white;
    text-align: center;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: background 0.2s;
}

.product-card .btn:hover {
    background: var(--jade-700);
}

/* Contact */
.contact {
    padding: 4rem 0;
}

.contact-desc {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.contact-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

/* Footer */
.footer {
    background: var(--jade-900);
    color: rgba(255,255,255,0.8);
    padding: 1.5rem;
    text-align: center;
}

/* Banner overlay */
.banner-overlay {
    position: fixed;
    inset: 0;
    z-index: 2147483647;
    background: rgba(0,0,0,0.6);
    align-items: center;
    justify-content: center;
}

.banner-overlay.active {
    display: flex !important;
}

.banner-overlay iframe,
.banner-overlay img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border: none;
}