/* HOI AN CORPORATION - Veridian Legacy Design System */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif:ital,wght@0,400;0,700;1,400&family=Manrope:wght@300;400;600&display=swap');

:root {
    --primary: #002215;
    --primary-container: #043927;
    --secondary: #D4AF37;
    --on-secondary: #000000;
    --surface: #f9f9f9;
    --on-surface: #1a1c1c;
    --marble-white: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Manrope', sans-serif;
    background-color: var(--surface);
    color: var(--on-surface);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, .serif {
    font-family: 'Noto Serif', serif;
    font-weight: 700;
    color: var(--primary);
}

/* Layout Utilities */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

section {
    padding: 120px 0;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(212, 175, 55, 0.1);
    padding: 20px 0;
    transition: var(--transition);
}

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

.logo {
    font-size: 1.5rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--primary);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--on-surface);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--primary);
    color: var(--marble-white);
    text-align: center;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0,34,21,0.5), rgba(0,34,21,0.8));
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero h1 {
    font-size: 4rem;
    color: var(--marble-white);
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.25rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--secondary);
}

/* Property/Portfolio Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.card {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    cursor: pointer;
}

.card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.card:hover img {
    transform: scale(1.05);
}

.card-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.3);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 40px;
    color: white;
    transition: var(--transition);
}

.card:hover .card-overlay {
    background: rgba(4, 57, 39, 0.7);
}

.card-title {
    font-family: 'Noto Serif', serif;
    font-size: 1.5rem;
    margin-bottom: 10px;
}

/* Footer */
footer {
    background: var(--primary);
    color: var(--marble-white);
    padding: 80px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 80px;
}

.footer-logo {
    font-family: 'Noto Serif', serif;
    font-size: 2rem;
    margin-bottom: 20px;
}

.footer-links h4 {
    margin-bottom: 20px;
    color: var(--secondary);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--secondary);
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 1s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}