/* namu.systems — styles */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --border: #30363d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent-blue: #58a6ff;
    --accent-blue-bright: #79c0ff;
    --accent-blue-deep: #1f6feb;
    --accent-gold: #d29922;
    --font-display: 'Commissioner', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --grid-unit: 16px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-display);
    font-weight: 400;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Boot screen */
#boot-screen {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

#boot-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

#boot-text {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    opacity: 0;
    animation: bootFadeIn 0.8s ease 0.2s forwards;
}

@keyframes bootFadeIn {
    to { opacity: 1; }
}

.accent {
    color: var(--accent-blue);
}

/* Header */
#site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: var(--grid-unit) calc(var(--grid-unit) * 2);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: calc(var(--grid-unit) * 2);
}

.logo {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -0.02em;
    white-space: nowrap;
}

#header-wave {
    flex: 1;
    height: 40px;
    opacity: 0.6;
}

#main-nav {
    display: flex;
    gap: calc(var(--grid-unit) * 1.5);
}

.nav-node {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 4px 8px;
    border: 1px solid transparent;
    border-radius: 4px;
    transition: color 0.2s, border-color 0.2s;
}

.nav-node:hover,
.nav-node.active {
    color: var(--accent-blue);
    border-color: var(--accent-blue);
}

/* Main content */
#content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 calc(var(--grid-unit) * 2);
}

/* Hero */
#hero {
    padding: calc(var(--grid-unit) * 8) 0 calc(var(--grid-unit) * 6);
}

.display-heading {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.8rem, 4vw, 3.6rem);
    line-height: 1.12;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: calc(var(--grid-unit) * 2);
}

.mono-caption {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

/* Section labels */
.section-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: calc(var(--grid-unit) * 3);
    padding-bottom: var(--grid-unit);
    border-bottom: 1px solid var(--border);
}

/* System Grid */
#work {
    padding: calc(var(--grid-unit) * 4) 0;
}

.system-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2px;
}

.grid-card {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: calc(var(--grid-unit) * 2);
    overflow: hidden;
    transition: border-color 0.3s ease, transform 0.2s ease;
    cursor: pointer;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.grid-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

.grid-card:hover .card-border-glow {
    opacity: 1;
}

.size-2x2 {
    grid-column: span 2;
    grid-row: span 2;
}

.size-2x1 {
    grid-column: span 2;
}

.size-1x2 {
    grid-row: span 2;
}

/* Card bokeh backgrounds */
.card-bokeh {
    position: absolute;
    inset: 0;
    opacity: 0.5;
    pointer-events: none;
}

.grid-card:nth-child(1) .card-bokeh {
    background:
        radial-gradient(circle at 30% 40%, rgba(88, 166, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(121, 192, 255, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 50% 80%, rgba(31, 111, 235, 0.05) 0%, transparent 45%);
}

.grid-card:nth-child(2) .card-bokeh {
    background:
        radial-gradient(circle at 60% 30%, rgba(88, 166, 255, 0.07) 0%, transparent 45%),
        radial-gradient(circle at 20% 70%, rgba(79, 192, 255, 0.06) 0%, transparent 50%);
}

.grid-card:nth-child(3) .card-bokeh {
    background:
        radial-gradient(circle at 40% 50%, rgba(31, 111, 235, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(88, 166, 255, 0.05) 0%, transparent 40%);
}

.grid-card:nth-child(4) .card-bokeh {
    background:
        radial-gradient(circle at 50% 40%, rgba(88, 166, 255, 0.06) 0%, transparent 45%),
        radial-gradient(circle at 20% 80%, rgba(121, 192, 255, 0.07) 0%, transparent 50%);
}

.grid-card:nth-child(5) .card-bokeh {
    background:
        radial-gradient(circle at 70% 50%, rgba(88, 166, 255, 0.07) 0%, transparent 50%),
        radial-gradient(circle at 30% 30%, rgba(31, 111, 235, 0.06) 0%, transparent 40%);
}

.grid-card:nth-child(6) .card-bokeh {
    background:
        radial-gradient(circle at 50% 60%, rgba(121, 192, 255, 0.08) 0%, transparent 50%);
}

/* Card content */
.card-content {
    position: relative;
    z-index: 1;
}

.card-index {
    display: block;
    margin-bottom: 8px;
    color: var(--accent-blue);
}

.card-content h3 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: -0.01em;
    margin-bottom: 8px;
}

.card-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.4;
}

.card-tech {
    color: var(--accent-gold);
}

.card-border-glow {
    position: absolute;
    inset: -1px;
    border: 1px solid var(--accent-blue);
    border-radius: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    box-shadow: inset 0 0 20px rgba(88, 166, 255, 0.05);
}

/* About section */
#about {
    padding: calc(var(--grid-unit) * 6) 0;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: calc(var(--grid-unit) * 4);
    align-items: start;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-primary);
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: calc(var(--grid-unit) * 2);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-value {
    font-size: 1.5rem;
    color: var(--accent-blue-bright);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Contact section */
#contact {
    padding: calc(var(--grid-unit) * 6) 0;
}

.contact-content {
    display: flex;
    flex-direction: column;
    gap: calc(var(--grid-unit) * 2);
}

.contact-link {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    color: var(--accent-blue);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: color 0.2s;
}

.contact-link:hover {
    color: var(--accent-blue-bright);
}

.contact-links {
    display: flex;
    gap: calc(var(--grid-unit) * 2);
    margin-top: var(--grid-unit);
}

.contact-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.contact-links a:hover {
    color: var(--accent-blue);
}

/* Footer */
#site-footer {
    padding: calc(var(--grid-unit) * 3) calc(var(--grid-unit) * 2);
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer-wave {
    width: 100%;
    height: 30px;
    margin-bottom: var(--grid-unit);
    opacity: 0.4;
}

/* Responsive */
@media (max-width: 900px) {
    .system-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .about-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .system-grid {
        grid-template-columns: 1fr;
    }
    .size-2x2, .size-2x1, .size-1x2 {
        grid-column: span 1;
        grid-row: span 1;
    }
    .header-inner {
        flex-wrap: wrap;
    }
    #header-wave {
        display: none;
    }
}