:root {
    /* Colors based on Brand Manual */
    --carbon-base: hsl(24, 15%, 8%);      /* #1A1612 */
    --carbon-light: hsl(24, 12%, 12%);     /* #221E1A */
    --carbon-lighter: hsl(24, 10%, 18%);   /* #302B26 */
    
    --gold: hsl(45, 65%, 52%);            /* #D4AF37 */
    --gold-dim: hsl(45, 45%, 35%);        /* #806B32 */
    --gold-bright: hsl(45, 75%, 60%);     /* #E6C455 */
    
    --text-primary: hsl(45, 20%, 90%);    /* #E8E4DB */
    --text-secondary: hsl(24, 10%, 60%);  /* #9E938A */
    --text-muted: hsl(24, 8%, 45%);       /* #756D65 */
    
    --status-success: hsl(142, 70%, 45%); /* #28A745 */
    
    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Fluid Type */
    --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --text-sm: clamp(0.875rem, 0.82rem + 0.27vw, 1rem);
    --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
    --text-lg: clamp(1.125rem, 1.05rem + 0.38vw, 1.25rem);
    --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
    --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3rem);
}

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

body {
    background-color: var(--carbon-base);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

/* Background Effects */
.grid-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(to right, var(--carbon-lighter) 1px, transparent 1px),
        linear-gradient(to bottom, var(--carbon-lighter) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -2;
    opacity: 0.15;
}

.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(255,255,255,0), rgba(255,255,255,0) 50%, rgba(0,0,0,0.1) 50%, rgba(0,0,0,0.1));
    background-size: 100% 4px;
    z-index: -1;
    pointer-events: none;
    opacity: 0.3;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    flex-grow: 1;
    width: 100%;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 3rem;
    border-bottom: 1px solid var(--carbon-lighter);
    background: rgba(26, 22, 18, 0.85);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
    font-size: var(--text-lg);
}

.logo-icon {
    color: var(--gold);
    font-family: var(--font-mono);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--text-muted);
    border: 1px solid var(--carbon-lighter);
    padding: 0.35rem 0.85rem;
    border-radius: 4px;
    background: var(--carbon-light);
    text-transform: uppercase;
}

.status-dot {
    width: 6px;
    height: 6px;
    background-color: var(--status-success);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--status-success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 1; box-shadow: 0 0 8px var(--status-success); }
    50% { opacity: 0.5; box-shadow: 0 0 2px var(--status-success); }
    100% { opacity: 1; box-shadow: 0 0 8px var(--status-success); }
}

/* Hero Section */
.hero {
    position: relative;
    padding: 6rem 2rem;
    text-align: center;
    margin-top: 4rem;
    margin-bottom: 3rem;
    border: 1px solid var(--gold-dim);
    background: var(--carbon-light);
    border-radius: 4px;
    overflow: hidden;
}

/* Corner Decorations HUD */
.corner {
    position: absolute;
    width: 20px;
    height: 20px;
    border-color: var(--gold);
    border-style: solid;
    border-width: 0;
    transition: all 0.3s ease;
}
.hero:hover .corner {
    width: 30px;
    height: 30px;
}
.top-left { top: -1px; left: -1px; border-top-width: 2px; border-left-width: 2px; }
.top-right { top: -1px; right: -1px; border-top-width: 2px; border-right-width: 2px; }
.bottom-left { bottom: -1px; left: -1px; border-bottom-width: 2px; border-left-width: 2px; }
.bottom-right { bottom: -1px; right: -1px; border-bottom-width: 2px; border-right-width: 2px; }

.hero::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at center, rgba(212,175,55,0.08) 0%, transparent 60%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: var(--text-4xl);
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.hero-title span {
    color: var(--gold);
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.hero-hud {
    position: absolute;
    bottom: 1rem;
    right: 1.5rem;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--text-muted);
    display: flex;
    gap: 1rem;
}

.hud-active {
    color: var(--gold);
}

/* Filters */
.filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 4rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--carbon-lighter);
    color: var(--text-secondary);
    padding: 0.5rem 1.25rem;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.25s ease;
}

.filter-btn:hover {
    border-color: var(--gold-dim);
    color: var(--text-primary);
}

.filter-btn.active {
    background: rgba(212, 175, 55, 0.1);
    border-color: var(--gold);
    color: var(--gold);
}

/* Demos Grid */
.demos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2.5rem;
    margin-bottom: 6rem;
}

.demo-card {
    background: var(--carbon-light);
    border: 1px solid var(--carbon-lighter);
    border-radius: 4px;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: flex;
    flex-direction: column;
    position: relative;
    height: 100%;
}

.demo-card:hover {
    border-color: var(--gold-dim);
    transform: translateY(-6px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 15px rgba(212, 175, 55, 0.1);
}

.demo-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--gold);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.demo-card:hover::after {
    transform: scaleX(1);
}

.demo-image-container {
    height: 200px;
    background: var(--carbon-base);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--carbon-lighter);
    overflow: hidden;
}

.demo-image-container::before {
    content: '</>';
    font-family: var(--font-mono);
    color: var(--carbon-lighter);
    font-size: 5rem;
    font-weight: bold;
    transition: all 0.4s ease;
}

.demo-card:hover .demo-image-container::before {
    color: var(--gold-dim);
    opacity: 0.3;
    transform: scale(1.1);
}

/* Actual image if exists */
.demo-image-container img {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    opacity: 0.7;
    transition: opacity 0.4s ease;
    z-index: 2;
}

.demo-card:hover .demo-image-container img {
    opacity: 1;
}

.demo-content {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.demo-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.demo-tag {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.demo-status {
    width: 6px;
    height: 6px;
    background-color: var(--status-success);
    border-radius: 50%;
}

.demo-title {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.demo-desc {
    color: var(--text-secondary);
    font-size: var(--text-sm);
    margin-bottom: 2rem;
    flex-grow: 1;
}

.demo-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 1.5rem;
    background: transparent;
    border: 1px solid var(--gold-dim);
    color: var(--gold);
    text-decoration: none;
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: var(--text-sm);
    font-weight: 500;
    border-radius: 4px;
    transition: all 0.25s ease;
    width: 100%;
}

.demo-link::after {
    content: '→';
    font-family: var(--font-mono);
    transition: transform 0.25s ease;
}

.demo-card:hover .demo-link {
    background: var(--gold);
    color: var(--carbon-base);
    border-color: var(--gold);
}

.demo-card:hover .demo-link::after {
    transform: translateX(4px);
}

/* Footer */
.footer {
    border-top: 1px solid var(--carbon-lighter);
    padding: 2.5rem;
    text-align: center;
    color: var(--text-muted);
    font-size: var(--text-sm);
    font-family: var(--font-body);
    position: relative;
    background: var(--carbon-light);
}

.footer span:not(.footer-icon) {
    color: var(--text-secondary);
}

.footer-icon {
    color: var(--gold);
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }
    .hero {
        padding: 4rem 1.5rem;
        margin-top: 2rem;
    }
    .hero-title {
        font-size: var(--text-2xl);
    }
    .hero-hud {
        display: none;
    }
    .container {
        padding: 0 1rem;
    }
    .demos-grid {
        grid-template-columns: 1fr;
    }
}