:root {
    /* Fluent Design Color Tokens */
    --fluent-accent: #0078d4;
    --fluent-on-accent: #ffffff;
    --fluent-accent-secondary: #005a9e;
    
    --fluent-bg: #f3f3f3;
    --fluent-surface: #ffffff;
    --fluent-on-surface: #242424;
    --fluent-on-surface-secondary: #616161;
    
    --fluent-layer-1: #ffffff;
    --fluent-layer-2: #fafafa;
    --fluent-layer-3: #f5f5f5;
    
    --fluent-border: rgba(0, 0, 0, 0.05);
    --fluent-border-strong: rgba(0, 0, 0, 0.1);
    
    --fluent-error: #d13438;
    --fluent-success: #107c10;

    /* Shapes */
    --fluent-radius-small: 4px;
    --fluent-radius-medium: 8px;
    --fluent-radius-large: 12px;

    /* Typography */
    --font-main: 'Segoe UI Variable', 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Elevations */
    --shadow-card: 0 2px 4px rgba(0, 0, 0, 0.04), 0 0 2px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 4px 8px rgba(0, 0, 0, 0.08), 0 0 4px rgba(0, 0, 0, 0.04);
    --shadow-flyout: 0 8px 16px rgba(0, 0, 0, 0.14);
}

body {
    font-family: var(--font-main);
    background-color: var(--fluent-bg);
    color: var(--fluent-on-surface);
    line-height: 1.5;
    font-size: 14px;
    margin: 0;
    -webkit-font-smoothing: antialiased;
}

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
    color: var(--fluent-on-surface);
    font-weight: 600;
}

.display-large {
    font-size: 42px;
    line-height: 52px;
    margin-bottom: 24px;
}

.display-medium {
    font-size: 32px;
    line-height: 40px;
    margin-bottom: 20px;
}

.headline-large {
    font-size: 24px;
    line-height: 32px;
    margin-bottom: 16px;
}

.title-large {
    font-size: 18px;
    line-height: 24px;
    font-weight: 600;
}

.label-large {
    font-size: 12px;
    line-height: 16px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Navigation - Fluent App Bar */
.top-app-bar {
    background-color: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px) saturate(125%);
    height: 48px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--fluent-border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

.brand {
    font-size: 16px;
    font-weight: 600;
    color: var(--fluent-on-surface);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 4px;
}

.nav-link-m3 {
    text-decoration: none;
    color: var(--fluent-on-surface);
    padding: 6px 12px;
    border-radius: var(--fluent-radius-small);
    font-weight: 400;
    font-size: 14px;
    transition: background-color 0.1s ease;
}

.nav-link-m3:hover {
    background-color: rgba(0, 0, 0, 0.04);
}

.nav-link-m3.active {
    background-color: rgba(0, 0, 0, 0.06);
    font-weight: 600;
}

/* Admin Nav Group */
.admin-nav-group {
    background-color: var(--fluent-layer-3);
    border: 1px solid var(--fluent-border-strong);
    padding: 2px;
    border-radius: 100px;
    display: inline-flex;
    align-items: center;
    margin-left: 8px;
}

.admin-nav-group .nav-link-m3 {
    border-radius: 100px;
    font-size: 13px;
    padding: 4px 12px;
}

.admin-nav-group .nav-link-m3.active {
    background-color: var(--fluent-accent);
    color: var(--fluent-on-accent);
}

/* Components */
.m3-card {
    background-color: var(--fluent-surface);
    border-radius: var(--fluent-radius-medium);
    padding: 20px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--fluent-border);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.m3-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card-hover);
}

.m3-card-image {
    width: 100%;
    height: 250px;
    border-radius: var(--fluent-radius-small);
    object-fit: cover;
    margin-bottom: 12px;
}

.btn-m3-filled {
    background-color: var(--fluent-accent);
    color: var(--fluent-on-accent);
    padding: 6px 20px;
    border-radius: var(--fluent-radius-small);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-bottom-color: rgba(0, 0, 0, 0.2);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.1s;
    display: inline-block;
    text-decoration: none;
}

.btn-m3-filled:hover {
    background-color: var(--fluent-accent-secondary);
}

.btn-m3-tonal {
    background-color: var(--fluent-layer-3);
    color: var(--fluent-on-surface);
    padding: 6px 20px;
    border-radius: var(--fluent-radius-small);
    border: 1px solid var(--fluent-border-strong);
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}

.btn-m3-tonal:hover {
    background-color: var(--fluent-layer-2);
}

/* Layout Sections */
.hero-section {
    padding: 60px 0;
    text-align: center;
    background-color: var(--fluent-layer-2);
}

.hero-image-container {
    width: 100%;
    max-width: 1000px;
    margin: 32px auto 0;
    border-radius: var(--fluent-radius-large);
    overflow: hidden;
    box-shadow: var(--shadow-flyout);
    border: 1px solid var(--fluent-border);
}

.hero-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    display: block;
}

.section-padding {
    padding: 80px 0;
}

.chip {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--fluent-radius-small);
    background-color: var(--fluent-accent);
    color: var(--fluent-on-accent);
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 8px;
    text-transform: uppercase;
}

/* Utilities */
.bg-surface-container {
    background-color: var(--fluent-layer-3) !important;
}

.bg-surface-container-high {
    background-color: var(--fluent-layer-2) !important;
}

.text-secondary {
    color: var(--fluent-on-surface-secondary) !important;
}

.animate-fade-in {
    animation: fadeInUp 0.4s ease-out forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

footer {
    padding: 40px 0;
    background-color: var(--fluent-layer-3);
    border-top: 1px solid var(--fluent-border);
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .display-large {
        font-size: 2.5rem;
        line-height: 3rem;
    }

    .hero-image {
        height: 300px;
    }

    .top-app-bar {
        height: auto;
        padding: 16px 0;
    }

    .nav-container {
        flex-direction: column;
        gap: 16px;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}