:root {
    --bg-color: #121212;
    --surface-color: #1E1E1E;
    --surface-hover: #2A2A2A;
    --text-primary: #E0E0E0;
    --text-secondary: #B0B0B0;
    --accent-color: #D4AF37;
    /* Gold */
    --accent-hover: #F4CF57;
    --border-color: #333333;
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    --container-width: 1200px;
    --spacing-unit: 1rem;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    font-size: 16px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    margin-bottom: var(--spacing-unit);
    font-weight: 700;
}

h1 {
    font-size: 3rem;
    line-height: 1.2;
}

h2 {
    font-size: 2.25rem;
    margin-top: 2rem;
}

h3 {
    font-size: 1.5rem;
    margin-top: 1.5rem;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-hover);
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header & Navigation */
header {
    background-color: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1001;
    padding: 1rem 0;
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

/* Hero Section */
.hero {
    padding: 6rem 0;
    text-align: center;
    background: linear-gradient(rgba(18, 18, 18, 0.7), rgba(18, 18, 18, 1)), url('/assets/images/hero-bg.webp');
    background-size: cover;
    background-position: center;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background-color: var(--accent-color);
    color: #121212;
    font-weight: 600;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
    background-color: var(--accent-hover);
    color: #000;
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    margin-left: 1rem;
}

.btn-secondary:hover {
    background-color: rgba(212, 175, 55, 0.1);
    color: var(--accent-hover);
}

/* Content Sections */
section {
    padding: 5rem 0;
}

.bg-surface {
    background-color: var(--surface-color);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

.card h3 {
    margin-top: 0;
    color: var(--accent-color);
}

/* Footer */
footer {
    background-color: var(--surface-color);
    padding: 4rem 0 2rem;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

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

.footer-links li {
    margin-bottom: 0.8rem;
}

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

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Utilities */
.text-center {
    text-align: center;
}

.mb-2 {
    margin-bottom: 2rem;
}

.mt-4 {
    margin-top: 4rem;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    .hero-content h1 {
        font-size: 3rem;
    }

    .nav-links {
        display: none;
        /* TODO: Add mobile menu toggle */
    }

    .grid-2 {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* Temporary Placeholder Filters for Variety */
.img-sepia {
    filter: sepia(0.6) contrast(1.2);
}

.img-bw {
    filter: grayscale(100%) contrast(1.1);
}

.img-cool {
    filter: hue-rotate(180deg) saturate(0.8);
}

.img-warm {
    filter: sepia(0.3) saturate(1.5) hue-rotate(-10deg);
}

/* --- Mobile Navigation (Creative) --- */

/* Toggle Button */
.nav-toggle {
    display: none;
    /* Desktop default */
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
    /* Above overlay */
    position: relative;
    width: 40px;
    height: 40px;
}

.hamburger-box {
    width: 24px;
    height: 24px;
    display: inline-block;
    position: relative;
}

.hamburger-inner {
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    transition: background-color 0.1s 0.2s ease;
}

.hamburger-inner::before,
.hamburger-inner::after {
    content: '';
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    position: absolute;
    left: 0;
    transition: transform 0.2s 0.2s ease;
}

.hamburger-inner::before {
    top: -8px;
}

.hamburger-inner::after {
    top: 8px;
}

/* Overlay */
.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-nav-content {
    text-align: center;
}

.mobile-nav-links {
    list-style: none;
}

.mobile-nav-links li {
    margin-bottom: 2rem;
    overflow: hidden;
}

.mobile-nav-links a {
    font-family: var(--font-heading);
    font-size: 3rem;
    color: var(--text-primary);
    display: inline-block;
    transform: translateY(100%);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    opacity: 0;
}

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

/* Open State */
body.nav-open {
    overflow: hidden;
    /* Prevent scrolling */
}

body.nav-open .mobile-nav-overlay {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Animated Hamburger to X */
body.nav-open .hamburger-inner {
    background-color: transparent;
    transition-delay: 0s;
}

body.nav-open .hamburger-inner::before {
    top: 0;
    transform: rotate(45deg);
    transition-delay: 0.1s;
    background-color: var(--accent-color);
}

body.nav-open .hamburger-inner::after {
    top: 0;
    transform: rotate(-45deg);
    transition-delay: 0.1s;
    background-color: var(--accent-color);
}

/* Staggered Links Animation */
body.nav-open .mobile-nav-links a {
    transform: translateY(0);
    opacity: 1;
    transition-delay: calc(0.1s * var(--i));
}

/* Responsive Logic */
@media (max-width: 768px) {
    .nav-links.desktop-only {
        display: none;
    }

    .nav-toggle {
        display: block;
    }

    /* Grid Adjustments from previous step */
    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    h1 {
        font-size: 2.5rem;
    }
}