/*
 * Air-Gap / Offline Mode page styles.
 * CSP-compliant: no inline styles anywhere, every dynamic state is a class.
 *
 * Palette deliberately diverges from /discovery/: this page is about an enclave with
 * no route out, so the accent is a colder isolation-blue against the shared teal,
 * and the "sealed" surfaces are flatter and darker than the main documentation page.
 */

:root {
    --off-primary: #00d4aa;
    --off-isolate: #4d9fff;
    --off-isolate-dim: rgba(77, 159, 255, 0.28);
    --off-accent: #00ffea;
    --off-bg: #04080c;
    --off-surface: rgba(8, 16, 24, 0.86);
    --off-surface-2: rgba(12, 22, 32, 0.94);
    --off-line: rgba(0, 212, 170, 0.22);
    --off-line-cool: rgba(77, 159, 255, 0.28);
    --off-text: #e6edf3;
    --off-muted: #8a9bae;
    --off-warn: #ffaa00;
    --off-danger: #ff4466;
    --off-ok: #00ff88;
    --off-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

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

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--off-bg);
    color: var(--off-text);
    line-height: 1.65;
    min-height: 100vh;
}

/* The animated canvas sits behind everything and never intercepts input. */
.offline-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.offline-shell {
    position: relative;
    z-index: 1;
    max-width: 1180px;
    margin: 0 auto;
    padding: 32px 20px 80px;
}

/* ============================ header + hero ============================ */

.offline-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--off-line);
}

.offline-back {
    color: var(--off-primary);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 600;
}

.offline-back:hover { color: var(--off-accent); text-decoration: underline; }

.offline-crumbs { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.offline-hero { padding: 44px 0 10px; }

.offline-eyebrow {
    display: inline-block;
    font-family: var(--off-mono);
    font-size: 0.74rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--off-isolate);
    border: 1px solid var(--off-line-cool);
    border-radius: 999px;
    padding: 5px 14px;
    margin-bottom: 20px;
}

.offline-title {
    font-size: clamp(2rem, 4.6vw, 3.1rem);
    line-height: 1.12;
    letter-spacing: -0.02em;
    margin-bottom: 18px;
}

.offline-title em {
    font-style: normal;
    color: var(--off-primary);
}

.offline-lede {
    font-size: 1.12rem;
    color: var(--off-muted);
    max-width: 74ch;
    margin-bottom: 16px;
}

.offline-lede strong { color: var(--off-text); }

.offline-facts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 14px;
    margin-top: 30px;
}

.offline-fact {
    background: var(--off-surface);
    border: 1px solid var(--off-line);
    border-radius: 12px;
    padding: 16px 18px;
}

.offline-fact-value {
    display: block;
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--off-primary);
    line-height: 1.1;
}

.offline-fact-label {
    display: block;
    font-size: 0.8rem;
    color: var(--off-muted);
    margin-top: 4px;
}

/* ============================ layout ============================ */

.offline-body {
    display: grid;
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 40px;
    margin-top: 48px;
    align-items: start;
}

.offline-toc {
    position: sticky;
    top: 24px;
    background: var(--off-surface);
    border: 1px solid var(--off-line);
    border-radius: 14px;
    padding: 18px 16px;
}

.offline-toc h2 {
    font-size: 0.74rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--off-muted);
    margin-bottom: 12px;
}

.offline-toc a {
    display: block;
    color: var(--off-muted);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 6px 10px;
    border-left: 2px solid transparent;
    border-radius: 0 6px 6px 0;
}

.offline-toc a:hover { color: var(--off-text); background: rgba(0, 212, 170, 0.07); }

.offline-toc a.is-current {
    color: var(--off-primary);
    border-left-color: var(--off-primary);
    background: rgba(0, 212, 170, 0.1);
}

/* ============================ sections ============================ */

.offline-section { margin-bottom: 56px; scroll-margin-top: 24px; }

.offline-section h2 {
    font-size: 1.65rem;
    letter-spacing: -0.01em;
    margin-bottom: 8px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--off-line);
}

.offline-section h3 {
    font-size: 1.12rem;
    color: var(--off-primary);
    margin: 26px 0 8px;
}

.offline-section h4 {
    font-size: 0.98rem;
    color: var(--off-text);
    margin: 18px 0 6px;
}

.offline-section p { color: var(--off-muted); margin-bottom: 14px; max-width: 78ch; }
.offline-section p strong { color: var(--off-text); }
.offline-section ul, .offline-section ol { color: var(--off-muted); margin: 0 0 16px 22px; }
.offline-section li { margin-bottom: 8px; max-width: 76ch; }
.offline-section li strong { color: var(--off-text); }

.offline-section a { color: var(--off-primary); }
.offline-section a:hover { color: var(--off-accent); }

code {
    font-family: var(--off-mono);
    font-size: 0.88em;
    background: rgba(0, 212, 170, 0.1);
    border: 1px solid var(--off-line);
    border-radius: 4px;
    padding: 1px 5px;
    color: var(--off-accent);
}

/* ============================ code blocks ============================ */

.offline-code {
    position: relative;
    background: #05090d;
    border: 1px solid var(--off-line);
    border-radius: 12px;
    margin: 14px 0 22px;
    overflow: hidden;
}

.offline-code-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 14px;
    background: rgba(0, 212, 170, 0.07);
    border-bottom: 1px solid var(--off-line);
}

.offline-code-title {
    font-family: var(--off-mono);
    font-size: 0.76rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--off-muted);
}

.offline-copy {
    font-family: inherit;
    font-size: 0.74rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--off-primary);
    background: transparent;
    border: 1px solid var(--off-line);
    border-radius: 6px;
    padding: 3px 10px;
    cursor: pointer;
}

.offline-copy:hover { background: rgba(0, 212, 170, 0.14); }
.offline-copy.is-copied { color: var(--off-ok); border-color: var(--off-ok); }

.offline-code pre {
    margin: 0;
    padding: 14px 16px;
    overflow-x: auto;
    font-family: var(--off-mono);
    font-size: 0.84rem;
    line-height: 1.6;
    color: #cfe6dd;
}

/* ============================ callouts ============================ */

.offline-note {
    border-left: 3px solid var(--off-primary);
    background: var(--off-surface);
    border-radius: 0 10px 10px 0;
    padding: 14px 18px;
    margin: 18px 0 22px;
}

.offline-note.is-isolate { border-left-color: var(--off-isolate); }
.offline-note.is-warn { border-left-color: var(--off-warn); }

.offline-note p { margin-bottom: 0; }
.offline-note p + p { margin-top: 10px; }

/* ============================ download + config grids ============================ */

.offline-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(238px, 1fr));
    gap: 16px;
    margin: 18px 0 24px;
}

.offline-card {
    display: block;
    background: var(--off-surface);
    border: 1px solid var(--off-line);
    border-radius: 12px;
    padding: 18px;
    text-decoration: none;
    color: inherit;
}

a.offline-card:hover {
    border-color: var(--off-primary);
    background: var(--off-surface-2);
}

.offline-card-kicker {
    font-family: var(--off-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--off-isolate);
}

.offline-card-name {
    display: block;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--off-text);
    margin: 6px 0 4px;
}

.offline-card-meta {
    display: block;
    font-size: 0.84rem;
    color: var(--off-muted);
}

.offline-card-meta code { font-size: 0.8rem; }

/* ============================ tables ============================ */

.offline-table-wrap { overflow-x: auto; margin: 16px 0 24px; }

.offline-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    min-width: 560px;
}

.offline-table th,
.offline-table td {
    text-align: left;
    padding: 10px 14px;
    border-bottom: 1px solid var(--off-line);
    vertical-align: top;
}

.offline-table th {
    color: var(--off-primary);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: rgba(0, 212, 170, 0.06);
}

.offline-table td { color: var(--off-muted); }
.offline-table td strong { color: var(--off-text); }
.offline-table tr:last-child td { border-bottom: none; }

/* ============================ output file anatomy ============================ */

.offline-artifact {
    background: var(--off-surface);
    border: 1px solid var(--off-line);
    border-radius: 14px;
    padding: 22px 24px;
    margin: 20px 0;
}

.offline-artifact.is-isolate { border-color: var(--off-line-cool); }

.offline-artifact-head {
    display: flex;
    align-items: baseline;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 6px;
}

.offline-artifact-name {
    font-family: var(--off-mono);
    font-size: 1.12rem;
    color: var(--off-accent);
}

.offline-artifact-role {
    font-size: 0.82rem;
    color: var(--off-muted);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.offline-artifact h3:first-of-type { margin-top: 18px; }

/* ============================ standards / future-format ============================ */

.offline-standard {
    background: linear-gradient(160deg, rgba(77, 159, 255, 0.09), rgba(0, 212, 170, 0.05));
    border: 1px solid var(--off-line-cool);
    border-radius: 16px;
    padding: 28px 30px;
    margin-top: 12px;
}

.offline-standard h2 { border-bottom-color: var(--off-line-cool); }

.offline-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
    margin: 22px 0 8px;
}

.offline-milestone {
    background: rgba(4, 8, 12, 0.6);
    border: 1px solid var(--off-line-cool);
    border-radius: 10px;
    padding: 14px 16px;
}

.offline-milestone-when {
    display: block;
    font-family: var(--off-mono);
    font-size: 0.8rem;
    color: var(--off-isolate);
    letter-spacing: 0.06em;
}

.offline-milestone-what {
    display: block;
    font-size: 0.88rem;
    color: var(--off-muted);
    margin-top: 5px;
}

/* ============================ footer ============================ */

.offline-footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 30px 20px 44px;
    border-top: 1px solid var(--off-line);
    color: var(--off-muted);
    font-size: 0.88rem;
}

.offline-footer-links { margin-top: 8px; }
.offline-footer-links a { color: var(--off-primary); text-decoration: none; }
.offline-footer-links a:hover { text-decoration: underline; }

/* ============================ responsive ============================ */

@media (max-width: 900px) {
    /* minmax(0, 1fr), not 1fr: a bare 1fr track keeps min-width:auto, so a wide
       <pre> inside a code block expands the track and the whole document scrolls
       sideways on a phone. */
    .offline-body { grid-template-columns: minmax(0, 1fr); }
    .offline-toc { position: static; }
}

/* Deliberately NOT hiding .offline-canvas here: under reduced motion the script
   draws a single static frame of the enclave rather than animating it, so the page
   keeps its theme while honouring the preference. */

/* Off-screen scratch element used by the clipboard fallback in offline.js. Kept in
   CSS because a style="" attribute would violate the page's CSP. */
.offline-scratch {
    position: fixed;
    top: -1000px;
    left: -1000px;
    opacity: 0;
    pointer-events: none;
}

/* ============================ the probe cursor ============================
   Drawn on its own canvas above the content (see js/offline-cursor.js). The
   native cursor is hidden only while the probe is actually being rendered, so a
   touch device, a reduced-motion visitor, or a pointer that has left the window
   always keeps a real cursor. */

.offline-cursor-canvas {
    position: fixed;
    inset: 0;
    z-index: 9998;
    pointer-events: none;
}

.offline-probe-active,
.offline-probe-active a,
.offline-probe-active button,
.offline-probe-active summary,
.offline-probe-active input,
.offline-probe-active select {
    cursor: none;
}

/* Interactive targets get a visible affordance back, since the probe itself does
   not change shape on hover. */
.offline-probe-active a:hover,
.offline-probe-active button:hover {
    text-decoration-color: var(--off-accent);
}

/* ============================ motion toggle ============================
   Lets the visitor override the OS motion preference for this page. Hidden
   until offline-motion.js wires it, since without scripting it cannot do
   anything (and without scripting nothing is animating either). */

.offline-top-right {
    display: flex;
    align-items: center;
    gap: 14px;
}

.offline-motion-toggle {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-family: var(--off-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--off-muted);
    background: transparent;
    border: 1px solid var(--off-line-cool);
    border-radius: 999px;
    padding: 4px 12px;
    cursor: pointer;
}

.offline-motion-toggle.is-unwired { display: none; }

.offline-motion-toggle:hover {
    color: var(--off-text);
    border-color: var(--off-isolate);
}

.offline-motion-toggle:focus-visible {
    outline: 2px solid var(--off-isolate);
    outline-offset: 2px;
}

.offline-motion-state { color: var(--off-muted); }

.offline-motion-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--off-muted);
}

/* Lit only while animation is actually running. */
.offline-motion-on .offline-motion-toggle {
    color: var(--off-primary);
    border-color: var(--off-line);
}

.offline-motion-on .offline-motion-state { color: var(--off-primary); }

.offline-motion-on .offline-motion-dot {
    background: var(--off-primary);
    box-shadow: 0 0 8px var(--off-primary);
}