/* ===================================
   DEV LOG - Game Development Journal
   A distinctive dark aesthetic with 
   terminal vibes and neon accents
   =================================== */

/* CSS Custom Properties */
:root {
    /* Core Colors - Dark cyberpunk palette */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: #151520;
    
    /* Accent Colors - Electric cyan & warm amber */
    --accent-primary: #00ffd5;
    --accent-secondary: #ff6b35;
    --accent-tertiary: #bf5af2;
    
    /* Text Colors */
    --text-primary: #e8e8ed;
    --text-secondary: #9898a6;
    --text-muted: #5a5a6e;
    
    /* Functional Colors */
    --border-color: #2a2a3a;
    --border-glow: rgba(0, 255, 213, 0.3);
    --overlay-dark: rgba(10, 10, 15, 0.9);
    
    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-display);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Atmospheric Effects */
.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.03;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 255, 213, 0.1) 2px,
        rgba(0, 255, 213, 0.1) 4px
    );
}

.grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9998;
    opacity: 0.02;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ===== HEADER ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: linear-gradient(180deg, var(--bg-primary) 0%, transparent 100%);
    padding: var(--space-lg) 0;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

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

.logo {
    display: flex;
    align-items: baseline;
    gap: var(--space-xs);
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-bracket {
    color: var(--accent-primary);
}

.logo-text {
    color: var(--text-primary);
    letter-spacing: 0.1em;
}

.logo-subtitle {
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    margin-left: var(--space-sm);
}

.main-nav {
    display: flex;
    gap: var(--space-xl);
}

.nav-link {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    letter-spacing: 0.05em;
    position: relative;
    padding: var(--space-sm) 0;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* ===== HERO SECTION ===== */
.hero {
    padding: calc(100px + var(--space-3xl)) 0 var(--space-3xl);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(0, 255, 213, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(191, 90, 242, 0.06) 0%, transparent 40%);
    pointer-events: none;
}

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

.terminal-line {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.prompt {
    color: var(--accent-primary);
}

.command {
    color: var(--text-secondary);
}

.typing::after {
    content: '▋';
    animation: blink 1s step-end infinite;
    color: var(--accent-primary);
}

@keyframes blink {
    50% { opacity: 0; }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.hero-title .highlight {
    color: var(--accent-primary);
    position: relative;
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-2xl);
    max-width: 600px;
}

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ===== SECTION COMMON ===== */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.title-accent {
    color: var(--accent-primary);
    font-family: var(--font-mono);
}

/* ===== ENTRIES SECTION ===== */
.entries-section {
    padding: var(--space-3xl) 0;
}

.filter-tags {
    display: flex;
    gap: var(--space-sm);
}

.tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tag:hover,
.tag.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-primary);
}

.entries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-xl);
}

/* Entry Card */
.entry-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    position: relative;
}

.entry-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-tertiary));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.entry-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 
        0 20px 40px -20px rgba(0, 0, 0, 0.5),
        0 0 40px -20px var(--border-glow);
}

.entry-card:hover::before {
    opacity: 1;
}

/* Entry Media */
.entry-media {
    position: relative;
    aspect-ratio: 16 / 9;
    background: var(--bg-secondary);
    overflow: hidden;
}

.entry-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.8;
    transition: opacity var(--transition-base);
}

.entry-card:hover .entry-video {
    opacity: 1;
}

.video-controls {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    opacity: 1;
    transition: opacity var(--transition-base);
}

.entry-card:hover .video-controls {
    opacity: 1;
}

.play-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--accent-primary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    color: var(--bg-primary);
}

.play-btn svg {
    width: 24px;
    height: 24px;
    margin-left: 4px;
}

.play-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 30px var(--accent-primary);
}

.play-btn.playing svg {
    margin-left: 0;
}

.entry-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.625rem;
    padding: var(--space-xs) var(--space-sm);
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid var(--accent-primary);
    border-radius: var(--radius-sm);
    color: var(--accent-primary);
    letter-spacing: 0.1em;
    backdrop-filter: blur(4px);
}

/* Missing video state (keeps layout stable if MP4 is not present) */
.entry-media.missing .entry-video {
    opacity: 0.15;
    filter: grayscale(1);
}

.entry-media.missing::after {
    content: 'VIDEO NOT FOUND';
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.35);
}

/* Entry Content */
.entry-content {
    padding: var(--space-lg);
}

.entry-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.entry-date {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.entry-date svg {
    width: 14px;
    height: 14px;
}

.entry-tag {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    color: var(--accent-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.entry-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    line-height: 1.4;
}

.entry-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

.entry-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-color);
}

.entry-stats {
    display: flex;
    gap: var(--space-md);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stat-item svg {
    width: 14px;
    height: 14px;
}

.expand-btn {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    letter-spacing: 0.05em;
    text-decoration: none;
    display: inline-block;
}

.expand-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* ===== DOWNLOADS SECTION ===== */
.downloads-section {
    padding: var(--space-3xl) 0;
    background: var(--bg-secondary);
}

.downloads-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.download-card {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.download-card:not(.placeholder):hover {
    border-color: var(--accent-primary);
}

.download-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    color: var(--accent-primary);
    flex-shrink: 0;
}

.download-icon svg {
    width: 24px;
    height: 24px;
}

.download-info {
    flex: 1;
}

.download-info h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.download-info p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
}

.version {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.download-btn {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: var(--space-sm) var(--space-lg);
    background: var(--accent-primary);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--bg-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.download-btn:hover:not(.disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 255, 213, 0.3);
}

.download-btn.disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: not-allowed;
}

.downloads-note {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-align: center;
    font-style: italic;
}

/* ===== ABOUT SECTION ===== */
.about-section {
    padding: var(--space-3xl) 0;
}

.about-content {
    max-width: 700px;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.8;
}

.about-text strong {
    color: var(--accent-primary);
}

.tech-stack {
    margin-top: var(--space-2xl);
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.tech-stack h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.tech-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
}

/* ===== FOOTER ===== */
.site-footer {
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.footer-logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1rem;
}

.footer-text {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-link {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--accent-primary);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .main-nav {
        gap: var(--space-lg);
    }
    
    .hero-stats {
        gap: var(--space-lg);
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .entries-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .download-card {
        flex-direction: column;
        text-align: center;
    }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.entry-card {
    animation: fadeInUp 0.6s ease backwards;
}

.entry-card:nth-child(1) { animation-delay: 0.1s; }
.entry-card:nth-child(2) { animation-delay: 0.2s; }
.entry-card:nth-child(3) { animation-delay: 0.3s; }
.entry-card:nth-child(4) { animation-delay: 0.4s; }

/* Video Playing State */
.entry-media.playing .video-controls {
    opacity: 0;
}

.entry-media.playing:hover .video-controls {
    opacity: 1;
}

.entry-media.playing .play-btn svg path {
    d: path("M6 4h4v16H6zM14 4h4v16h-4z");
}