/* ==========================================================================
   Que — base tokens, reset, typography
   ========================================================================== */

:root {
    /* ---- palette: industrial terminal ------------------------------- */
    --bg: #0c0b0a;
    --bg-raised: #131110;
    --surface: #18150f;
    --surface-2: #1f1b14;
    --border: #33291d;
    --border-faint: #241f18;

    --text: #f3ede2;
    --text-dim: #b3a898;
    --text-faint: #746a5c;

    --accent: #ff8a3d;
    --accent-strong: #ffb066;
    --accent-dim: #b85f22;
    --accent-ink: #000000;

    --green: #7fd9a8;
    --green-dim: #4c8a68;
    --blue: #7cb8e0;
    --red: #ff6b5e;

    --code-bg: #100e0c;
    --shadow-color: 20deg 60% 3%;

    /* ---- type ---------------------------------------------------------- */
    --font-display: 'JetBrains Mono', ui-monospace, monospace;
    --font-mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
    --font-body: 'IBM Plex Sans', -apple-system, sans-serif;

    --max-w: 1180px;
    --radius: 3px;
}

* { box-sizing: border-box; }

html {
    scroll-padding-top: 84px;
}
html.smooth-scroll {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;

    background-image:
        radial-gradient(ellipse 900px 500px at 15% -10%, rgba(255, 138, 61, 0.10), transparent 60%),
        radial-gradient(ellipse 700px 500px at 100% 0%, rgba(124, 184, 224, 0.06), transparent 60%);
    background-repeat: no-repeat;
}

/* subtle grain overlay for texture, applied once to body via ::before in site.css hero,
   but the base dotted-grid backdrop lives here so both pages share it */
.grid-backdrop {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
    background-size: 42px 42px;
    mask-image: radial-gradient(ellipse 1200px 800px at 50% 0%, black, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 1200px 800px at 50% 0%, black, transparent 70%);
}

img, svg { display: block; max-width: 100%; }

a {
    color: var(--accent-strong);
    text-decoration: none;
}
a:hover { text-decoration: underline; text-underline-offset: 3px; }

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1.2;
    color: var(--text);
    margin: 0 0 0.6em;
}

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

ul, ol { padding-left: 1.4em; margin: 0 0 1.1em; }
li { margin-bottom: 0.35em; }

code {
    font-family: var(--font-mono);
    font-size: 0.88em;
    background: rgba(255, 138, 61, 0.10);
    color: var(--accent-strong);
    padding: 0.14em 0.4em;
    border-radius: 3px;
}

pre {
    margin: 0 0 1.4em;
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow-x: auto;
    font-size: 14px;
    line-height: 1.6;
}
pre code {
    background: none;
    color: inherit;
    padding: 0;
    border-radius: 0;
    font-size: 1em;
}

blockquote {
    margin: 0 0 1.4em;
    padding: 0.2em 1.2em;
    border-left: 3px solid var(--accent-dim);
    background: rgba(255, 138, 61, 0.05);
    color: var(--text-dim);
}
blockquote p { margin: 0.7em 0; }

hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 3em 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 1.6em;
    font-size: 0.92em;
    display: block;
    overflow-x: auto;
}
th, td {
    text-align: left;
    padding: 0.55em 0.9em;
    border-bottom: 1px solid var(--border-faint);
    vertical-align: top;
}
th {
    font-family: var(--font-mono);
    font-size: 0.82em;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent-strong);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
tr:last-child td { border-bottom: none; }
td code, th code { white-space: nowrap; }

::selection {
    background: var(--accent);
    color: var(--accent-ink);
}

::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
    background: var(--surface-2);
    border: 2px solid var(--bg);
    border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover { background: var(--border); }

.container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 28px;
}

.visually-hidden {
    position: absolute;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

/* ---- shared site header/footer ---------------------------------------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    padding: 0 24px;
    background: rgba(12, 11, 10, 0.86);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-faint);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 18px;
    color: var(--text);
}
.brand:hover { text-decoration: none; color: var(--text); }
.brand .mark {
    color: var(--accent);
}
.brand .mark::after {
    content: '_';
    color: var(--accent);
    animation: caret-blink 1.1s steps(1) infinite;
}

@keyframes caret-blink {
    0%, 45% { opacity: 1; }
    50%, 100% { opacity: 0; }
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 28px;
}
.site-nav a {
    font-family: var(--font-mono);
    font-size: 13.5px;
    color: var(--text-dim);
    letter-spacing: 0.02em;
}
.site-nav a:hover { color: var(--accent-strong); text-decoration: none; }
.site-nav a.is-active { color: var(--text); }
.site-nav a.btn-primary,
.site-nav a.btn-primary:hover { color: var(--accent-ink); }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 13.5px;
    font-weight: 500;
    padding: 9px 16px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    color: var(--text);
    white-space: nowrap;
    transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}
.btn:hover { text-decoration: none; border-color: var(--text-faint); transform: translateY(-1px); }

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--accent-ink);
    font-weight: 700;
}
.btn-primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); color: var(--accent-ink); }

.btn-ghost { background: transparent; }
.btn-ghost:hover { background: var(--surface); }

.icon { width: 15px; height: 15px; flex: none; }

.nav-toggle {
    display: none;
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 38px; height: 38px;
    align-items: center;
    justify-content: center;
    color: var(--text);
}

.site-footer {
    border-top: 1px solid var(--border-faint);
    padding: 48px 0 32px;
    color: var(--text-faint);
    font-size: 13.5px;
}
.site-footer .container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
    justify-content: space-between;
}
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; }
.footer-links a { color: var(--text-dim); font-family: var(--font-mono); font-size: 13px; }
.footer-links a:hover { color: var(--accent-strong); }

@media (max-width: 860px) {
    .site-nav {
        display: none;
        position: absolute;
        top: 64px; left: 0; right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--bg);
        border-bottom: 1px solid var(--border-faint);
        padding: 8px 20px 18px;
    }
    .site-nav.is-open-mobile { display: flex; }
    .site-nav a, .site-nav .btn { padding: 12px 4px; border: none; }
    .nav-toggle { display: inline-flex; }
}

.manual-copy-btn {
    position: absolute;
    top: 8px; right: 10px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 4px 9px;
    border-radius: 3px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s ease;
}
pre:hover .manual-copy-btn { opacity: 1; }
.manual-copy-btn:hover { color: var(--accent-strong); border-color: var(--accent-dim); }