/* Design System */
:root {
    /* Color Palette */
    --color-slate-900: #1a202c;
    --color-slate-800: #2d3748;
    --color-slate-100: #f7fafc;
    --color-green-800: #22543d;
    --color-green-700: #2f855a;
    --color-green-100: #f0fff4;
    --color-earth-600: #975a16;
    --color-earth-100: #fffaf0;
    --color-white: #ffffff;
    --color-text-main: var(--color-slate-900);
    --color-text-muted: var(--color-slate-800);
    --color-bg-body: var(--color-slate-100);

    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
}

/* Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-body);
    color: var(--color-text-main);
    background-color: var(--color-bg-body);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--color-green-800);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

img {
    max-width: 100%;
    display: block;
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section {
    padding: var(--spacing-lg) 0;
}

/* Navigation */
.navbar {
    background-color: var(--color-white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-green-800);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    font-weight: 500;
    color: var(--color-slate-800);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-green-700);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
}

/* Hero Section */
.hero {
    height: 80vh;
    background-color: var(--color-slate-800);
    /* Fallback */
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--color-white);
    position: relative;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: var(--spacing-sm);
}

.hero-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--color-green-700);
    color: var(--color-white);
    border-radius: 4px;
    font-weight: 600;
    transition: background-color var(--transition-fast);
}

.btn:hover {
    background-color: var(--color-green-800);
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.card {
    background: var(--color-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-fast);
}

.card:hover {
    transform: translateY(-5px);
}

.card-image {
    height: 200px;
    background-color: var(--color-slate-200);
    background-size: cover;
    background-position: center;
}

.card-content {
    padding: var(--spacing-md);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

/* Footer */
.footer {
    background-color: var(--color-slate-900);
    color: var(--color-slate-100);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-title {
        font-size: 2rem;
    }
}

/* Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}