/* ============================================================
   zigxll shared stylesheet
   ============================================================ */

:root {
    --zig: #f7a41d;
    --zig-dark: #e08f0d;
    --nats: #27aae1;
    --bg: #0a0a0b;
    --bg-raised: #111113;
    --bg-code: #16161a;
    --border: #222228;
    --border-light: #2a2a32;
    --text: #e8e6e3;
    --text-muted: #8b8b96;
    --text-dim: #5c5c66;
    --green: #4ade80;
    --blue: #60a5fa;
    --purple: #a78bfa;
    --red: #f87171;
    --cyan: #22d3ee;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ── Nav ─────────────────────────────────────────────────── */

nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 0 2rem;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(10, 10, 11, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-logo {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--zig);
    text-decoration: none;
}

.nav-sep { color: var(--border); font-size: 1.2rem; }

.nav-current {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.15s;
}

.nav-links a:hover { color: var(--text); }

.github-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: border-color 0.15s, background 0.15s;
}

.github-link:hover {
    border-color: var(--text-dim) !important;
    background: var(--bg-raised);
}

/* ── Hero ────────────────────────────────────────────────── */

.hero {
    padding: 10rem 2rem 6rem;
    max-width: 72rem;
    margin: 0 auto;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 1rem;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 2rem;
    font-family: 'JetBrains Mono', monospace;
}

/* Colour variants for the badge */
.hero-badge--zig {
    background: rgba(247, 164, 29, 0.08);
    border: 1px solid rgba(247, 164, 29, 0.2);
    color: var(--zig);
}

.hero-badge--nats {
    background: rgba(39, 170, 225, 0.08);
    border: 1px solid rgba(39, 170, 225, 0.2);
    color: var(--nats);
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
}

.hero h1 .accent { color: var(--zig); }

.hero .subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-muted);
    max-width: 40rem;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ── Buttons ─────────────────────────────────────────────── */

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    background: var(--zig);
    color: #000;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 8px;
    text-decoration: none;
    transition: background 0.15s, transform 0.1s;
}

.btn-primary:hover { background: var(--zig-dark); transform: translateY(-1px); }

.btn-primary--nats { background: var(--nats); }
.btn-primary--nats:hover { background: var(--nats); opacity: 0.9; }

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    background: transparent;
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    text-decoration: none;
    transition: border-color 0.15s, background 0.15s;
}

.btn-secondary:hover {
    border-color: var(--text-dim);
    background: var(--bg-raised);
}

/* ── Stat strip (benchmark / stats) ─────────────────────── */

.stat-strip {
    margin: 4rem auto 0;
    max-width: 36rem;
    padding: 1.25rem 1.75rem;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    flex-wrap: wrap;
}

.stat-strip .stat { text-align: center; }

.stat-strip .stat .value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--green);
}

.stat-strip .stat .label {
    font-size: 0.75rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.15rem;
}

/* ── Section container + header ─────────────────────────── */

.section {
    padding: 6rem 2rem;
    max-width: 72rem;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 36rem;
    margin: 0 auto;
}

/* ── Code block ──────────────────────────────────────────── */

.code-block {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.code-block-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: rgba(255,255,255,0.02);
    border-bottom: 1px solid var(--border);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-dim);
}

.code-block-header .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.code-block pre {
    padding: 1.25rem;
    overflow-x: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    line-height: 1.7;
    color: var(--text);
}

/* ── Config block (nats) ─────────────────────────────────── */

.config-block {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.config-block-header {
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--border);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-dim);
}

.config-block pre {
    padding: 1.25rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    line-height: 1.8;
    color: var(--text);
    overflow-x: auto;
}

/* ── Inline code ─────────────────────────────────────────── */

code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85em;
    background: var(--bg-code);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    color: var(--blue);
}

/* ── Syntax colours ──────────────────────────────────────── */

/* Zig/Lua */
.kw  { color: var(--purple); }
.str { color: var(--green); }
.fn  { color: var(--blue); }
.cm  { color: var(--text-dim); }
.ty  { color: var(--cyan); }
.op  { color: var(--text-muted); }
.num { color: var(--zig); }

/* JSON */
.jk { color: var(--blue); }
.jv { color: var(--green); }
.jc { color: var(--text-dim); }

/* ── Detail list (checkmark bullets) ────────────────────── */

.detail-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: 1rem;
}

.detail-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.detail-list .check {
    color: var(--green);
    font-weight: bold;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

/* ── Split grid (two-column prose + code) ────────────────── */

.split-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.split-grid.reverse { direction: rtl; }
.split-grid.reverse > * { direction: ltr; }

/* ── Why Zig grid ────────────────────────────────────────── */

.why-zig-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.why-zig-card {
    background: var(--bg);
    padding: 2rem;
}

.why-zig-card .icon {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    display: block;
}

.why-zig-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.why-zig-card p {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ── Code showcase (index) ───────────────────────────────── */

.code-explain { padding-top: 1rem; }

.code-explain h2 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.code-explain p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.code-explain .feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.code-explain .feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.code-explain .feature-list li .check {
    color: var(--green);
    font-weight: bold;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

/* ── Streaming section (index) ───────────────────────────── */

.streaming-demo {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.streaming-demo-header {
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.75rem;
    color: var(--text-dim);
    font-family: 'JetBrains Mono', monospace;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.3; }
}

.live-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    background: var(--green);
    border-radius: 50%;
    animation: pulse 2s infinite;
    vertical-align: middle;
    flex-shrink: 0;
}

.spreadsheet-grid {
    display: grid;
    grid-template-columns: 2.5rem 1fr 1fr 1fr;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
}

.spreadsheet-grid .cell {
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--border);
    border-right: 1px solid var(--border);
}

.spreadsheet-grid .cell-header {
    background: rgba(255,255,255,0.02);
    color: var(--text-dim);
    font-weight: 500;
    text-align: center;
}

.spreadsheet-grid .cell-row-num {
    background: rgba(255,255,255,0.02);
    color: var(--text-dim);
    text-align: center;
}

.spreadsheet-grid .cell-formula { color: var(--blue); }
.spreadsheet-grid .cell-value   { color: var(--green); text-align: right; }

.streaming-explain h2 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.streaming-explain p {
    color: var(--text-muted);
    margin-bottom: 1.25rem;
    line-height: 1.7;
}

/* ── Quickstart steps (index) ────────────────────────────── */

.quickstart {
    padding: 6rem 2rem;
    max-width: 48rem;
    margin: 0 auto;
}

.quickstart h2 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-align: center;
    margin-bottom: 3rem;
}

.steps {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.step { display: flex; gap: 1.5rem; }

.step-num {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(247, 164, 29, 0.1);
    color: var(--zig);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    font-size: 0.85rem;
}

.step-content { flex: 1; min-width: 0; }

.step-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.step-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.step-content .code-inline {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text);
    display: block;
    overflow-x: auto;
}

/* ── Feature split (index) ───────────────────────────────── */

.feature-split {
    padding: 6rem 2rem;
    max-width: 72rem;
    margin: 0 auto;
}

.feature-split h2 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.feature-split p {
    color: var(--text-muted);
    margin-bottom: 1.25rem;
    line-height: 1.7;
}

.feature-split a {
    color: var(--zig);
    text-decoration: none;
}

.feature-split a:hover { text-decoration: underline; }

/* ── Resources grid (index) ──────────────────────────────── */

.resources {
    padding: 6rem 2rem;
    max-width: 72rem;
    margin: 0 auto;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.resource-card {
    display: block;
    padding: 1.75rem;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 10px;
    text-decoration: none;
    transition: border-color 0.15s, transform 0.1s;
}

.resource-card:hover {
    border-color: var(--text-dim);
    transform: translateY(-2px);
}

.resource-card .resource-type {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-dim);
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.resource-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.resource-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ── CTA (index) ─────────────────────────────────────────── */

.cta {
    padding: 6rem 2rem 8rem;
    text-align: center;
}

.cta h2 {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.cta p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 2rem;
    max-width: 32rem;
    margin-left: auto;
    margin-right: auto;
}

.cta-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ── Functions grid (nats) ───────────────────────────────── */

.fn-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.fn-card {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.fn-card-header {
    padding: 1rem 1.25rem 0.75rem;
    border-bottom: 1px solid var(--border);
}

.fn-sig {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--blue);
    font-weight: 500;
}

.fn-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

.fn-examples {
    padding: 0.75rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.fn-example {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    color: var(--text-dim);
}

.fn-example .formula { color: var(--green); }

/* ── Arch section (nats) ─────────────────────────────────── */

.arch {
    padding: 5rem 2rem;
    max-width: 72rem;
    margin: 0 auto;
}

.arch h2 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.arch p {
    color: var(--text-muted);
    margin-bottom: 1.1rem;
    line-height: 1.7;
    font-size: 0.95rem;
}

.arch .section-header { margin-bottom: 3rem; }

/* ── FX workbook panel (nats) ────────────────────────────── */

.workbook-panel {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.workbook-panel-header {
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--border);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-dim);
}

.workbook-panel-body {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.workbook-row-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    margin-bottom: 0.35rem;
}

/* ── Config section (nats) ───────────────────────────────── */

.config-section {
    padding: 5rem 2rem;
    max-width: 60rem;
    margin: 0 auto;
}

.config-section h2 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-align: center;
    margin-bottom: 0.75rem;
}

.config-section > p {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

/* ── Install CTA (nats) ──────────────────────────────────── */

.install {
    padding: 5rem 2rem 8rem;
    max-width: 40rem;
    margin: 0 auto;
    text-align: center;
}

.install h2 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.install p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.install-options {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ── Video embed ─────────────────────────────────────────── */

.video-section {
    padding: 5rem 2rem;
    max-width: 56rem;
    margin: 0 auto;
}

.video-section .section-header { margin-bottom: 2rem; }

.video-embed {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.video-embed iframe {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
}

/* ── Footer ──────────────────────────────────────────────── */

footer {
    padding: 2rem;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-dim);
}

footer a { color: var(--text-muted); text-decoration: none; }
footer a:hover { color: var(--text); }

/* ── Responsive ──────────────────────────────────────────── */

@media (max-width: 768px) {
    nav { padding: 0 1rem; }

    .nav-current,
    .nav-sep { display: none; }

    .nav-links a:not(.github-link) { display: none; }

    .hero { padding: 8rem 1.25rem 4rem; }

    .stat-strip { flex-direction: column; gap: 1.25rem; }

    .why-zig-grid { grid-template-columns: 1fr; }

    .split-grid,
    .split-grid.reverse,
    .fn-grid,
    .arch .split-grid {
        grid-template-columns: 1fr;
        direction: ltr;
    }

    .resources-grid { grid-template-columns: 1fr; }

    .section,
    .code-section,
    .streaming-section,
    .quickstart,
    .feature-split,
    .resources {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    .code-block pre { font-size: 0.72rem; }

    .step-content .code-inline {
        font-size: 0.72rem;
        word-break: break-all;
    }

    .spreadsheet-grid { font-size: 0.65rem; }
    .spreadsheet-grid .cell { padding: 0.5rem 0.4rem; }
}