:root {
    --primary: #051020; /* Deep Luxury Navy */
    --gold: #d4af37;
    --gold-hover: #b8860b;
    --text: #333;
    --light: #f4f6f8;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Montserrat', sans-serif; line-height: 1.6; color: var(--text); background-color: #fff; }
h1, h2, h3, h4, .logo { font-family: 'Playfair Display', serif; font-weight: 700; }
a { text-decoration: none; }
.text-center { text-align: center; }

.container { max-width: 1200px; margin: auto; padding: 0 20px; }
.bg-light { background-color: var(--light); }

/* Header & Nav */
.top-bar { background: var(--primary); color: #fff; font-size: 0.8rem; padding: 10px 0; border-bottom: 1px solid rgba(212, 175, 55, 0.3); }
.flex-between { display: flex; justify-content: space-between; }
header { padding: 20px 0; background: #fff; border-bottom: 1px solid #eee; position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 10px rgba(0,0,0,0.03); }
nav { display: flex; justify-content: space-between; align-items: center; }
.logo a { font-size: 1.8rem; letter-spacing: 2px; }
.nav-links { display: flex; list-style: none; align-items: center; }
.nav-links li a { color: var(--primary); margin-left: 2rem; font-weight: 600; font-size: 0.9rem; transition: 0.3s; text-transform: uppercase; letter-spacing: 1px; }
.nav-links li a:hover { color: var(--gold); }
.nav-cta { background: var(--gold); color: #fff !important; padding: 10px 20px; border-radius: 2px; }
.nav-cta:hover { background: var(--gold-hover); color: #fff !important; }

/* Buttons & Links */
.btn-gold { background: var(--gold); color: #fff; padding: 15px 40px; text-transform: uppercase; font-weight: 600; letter-spacing: 1px; border: none; cursor: pointer; transition: 0.3s; display: inline-block; }
.btn-gold:hover { background: var(--gold-hover); }
.link-gold { color: var(--gold); font-weight: 600; text-decoration: none; display: inline-block; margin-top: 1rem; border-bottom: 1px solid transparent; transition: 0.3s; }
.link-gold:hover { border-bottom: 1px solid var(--gold); }

/* Layouts */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; }

/* Hero Section */
.hero-slider { height: 85vh; display: flex; align-items: center; justify-content: center; text-align: center; color: #fff; background-size: cover; background-position: center; }
.hero-text h1 { font-size: 4.5rem; margin-bottom: 1.5rem; letter-spacing: 2px; text-shadow: 0 2px 10px rgba(0,0,0,0.5); }
.hero-text p { font-size: 1.2rem; margin-bottom: 2rem; }

/* Authority Section */
.authority-section { padding: 5rem 20px; }
.subtitle { color: var(--gold); text-transform: uppercase; font-weight: 600; letter-spacing: 2px; display: block; margin-bottom: 1rem; }
.authority-section h2 { font-size: 2.5rem; color: var(--primary); margin-bottom: 1.5rem; }

/* Grids & Cards */
.gem-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; margin-top: 3rem; }
.gem-category-card, .stone-card { background: #fff; border: 1px solid #eee; transition: 0.4s; overflow: hidden; border-radius: 4px; box-shadow: 0 5px 15px rgba(0,0,0,0.03); }
.gem-category-card:hover, .stone-card:hover { transform: translateY(-10px); box-shadow: 0 15px 40px rgba(0,0,0,0.1); }
.gem-category-card img, .image-wrapper img { width: 100%; height: 350px; object-fit: cover; transition: 0.5s; }
.gem-category-card:hover img, .stone-card:hover img { transform: scale(1.05); }
.gem-info, .stone-details { padding: 2rem; background: #fff; position: relative; z-index: 2; }
.stone-details h3 { font-size: 1.5rem; color: var(--primary); margin-bottom: 0.5rem; }
.stone-meta { font-size: 0.85rem; color: var(--gold); margin-bottom: 1rem; font-weight: 600; text-transform: uppercase; }

/* Process Steps */
.process-steps { display: flex; justify-content: space-between; margin-top: 4rem; text-align: center; gap: 2rem; }
.step { flex: 1; padding: 2rem; background: var(--light); border-top: 3px solid var(--gold); border-radius: 4px; }
.step-num { font-size: 3.5rem; color: #e0e0e0; font-weight: 700; display: block; margin-bottom: -15px; font-family: 'Playfair Display'; }
.step h4 { color: var(--primary); font-size: 1.2rem; margin-bottom: 10px; position: relative; z-index: 2; }

/* Footer */
.trust-banner { background: #0a192f; color: #fff; padding: 3rem 0; margin-top: 4rem; border-top: 4px solid var(--gold); }
footer { background: var(--primary); color: #ccc; padding: 4rem 0 2rem 0; }
footer h4 { color: #fff; font-size: 1.2rem; margin-bottom: 1.5rem; }
footer ul { list-style: none; }
footer ul li { margin-bottom: 10px; }
footer ul li a { color: #ccc; transition: 0.3s; }
footer ul li a:hover { color: var(--gold); }
.footer-about p { font-size: 0.9rem; }

@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-text h1 { font-size: 2.8rem; }
    .grid-2 { grid-template-columns: 1fr; gap: 2rem; }
    .process-steps { flex-direction: column; }
}