:root {
  --bg: #f4f5f2;
  --panel: #ffffff;
  --panel-2: #eff1ec;
  --ink: #1a1f2b;
  --ink-2: #475066;
  --muted: #687287;
  --line: #dde2da;
  --accent: #1f6b55;
  --accent-ink: #ffffff;
  --accent-soft: #e1f1ea;
  --gold: #c98a12;
  --mark: #ffe28a;
  --mark-ink: #2a2105;
  --ok: #1d7a46;
  --ok-soft: #e3f3e9;
  --warn: #9a5b00;
  --warn-soft: #fbf0dc;
  --bad: #b3261e;
  --bad-soft: #fbe6e4;
  --shadow: 0 1px 2px rgba(20, 30, 30, .06), 0 6px 20px rgba(20, 30, 30, .06);
  --radius: 14px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0f1412;
  --panel: #171d1a;
  --panel-2: #1e2622;
  --ink: #e7ebf3;
  --ink-2: #c0c8d8;
  --muted: #8d97ab;
  --line: #2b3530;
  --accent: #7fd4b4;
  --accent-ink: #0b1f18;
  --accent-soft: #16332a;
  --gold: #f2b84b;
  --mark: #6b5310;
  --mark-ink: #fff6d6;
  --ok: #6fd39a;
  --ok-soft: #173326;
  --warn: #f0b860;
  --warn-soft: #3a2c12;
  --bad: #ff8a80;
  --bad-soft: #3d1e1c;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.55 var(--font); }
a { color: var(--accent); }
button, input, textarea, select { font: inherit; color: inherit; }
.hidden { display: none !important; }
.sr, .sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--panel); padding: 8px 12px; border-radius: 8px; z-index: 50; }
.skip:focus { left: 12px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
code, pre { font-family: var(--mono); }

/* header */
.top { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top-in { max-width: 1100px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; gap: 12px; }
.brand { display: flex; align-items: center; gap: 9px; color: var(--ink); text-decoration: none; font-weight: 700; letter-spacing: -.01em; }
.brand-mark { width: 28px; height: 28px; color: var(--ink); }
.mark-dot { fill: var(--accent); }
.top-nav { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.ghost-link { color: var(--ink-2); text-decoration: none; font-size: 14px; padding: 6px 8px; }
.ghost-link:hover { color: var(--ink); }
.credits { font-size: 13px; color: var(--ink-2); background: var(--panel-2); border: 1px solid var(--line); padding: 4px 10px; border-radius: 999px; white-space: nowrap; }

/* buttons */
.btn { appearance: none; border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink); padding: 9px 16px; border-radius: 10px; font-weight: 600; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; gap: 6px; line-height: 1.2; }
.btn:hover:not(:disabled) { filter: brightness(1.08); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.small { padding: 6px 12px; font-size: 13px; border-radius: 8px; }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.ghost:hover:not(:disabled) { background: var(--accent-soft); filter: none; }
.btn.primary { padding: 11px 20px; font-size: 15.5px; }
.icon-btn { appearance: none; border: 1px solid var(--line); background: var(--panel); width: 34px; height: 34px; border-radius: 9px; display: inline-grid; place-items: center; cursor: pointer; color: var(--ink-2); font-size: 20px; line-height: 1; }
.icon-btn svg { width: 17px; height: 17px; }
.link-btn { appearance: none; border: 0; background: none; color: var(--accent); cursor: pointer; padding: 2px 4px; font-size: 13px; font-weight: 600; }
.link-btn:hover { text-decoration: underline; }
.linklike { color: var(--accent); text-decoration: underline; cursor: pointer; font-weight: 600; }

/* layout */
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px 40px; }
.intro { padding: 26px 0 18px; max-width: 820px; }
.intro h1 { font-family: var(--serif); font-size: clamp(26px, 4vw, 38px); line-height: 1.12; margin: 0 0 10px; letter-spacing: -.015em; }
.lede { margin: 0 0 14px; color: var(--ink-2); font-size: 16px; }
.lede strong { color: var(--ink); }
.intro-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.step { padding: 16px 18px 18px; margin-bottom: 16px; }
.step-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.step-head h2 { margin: 0; font-size: 18px; }
.step-n { width: 26px; height: 26px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; font-weight: 800; font-size: 13px; flex: none; }

/* source tabs */
.step .tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 12px; }
.step .tab { appearance: none; border: 0; border-bottom: 2px solid transparent; background: none; padding: 7px 12px; cursor: pointer; color: var(--ink-2); font-weight: 600; font-size: 14px; border-radius: 0; margin-bottom: -1px; }
.step .tab[aria-selected="true"] { color: var(--accent); border-bottom-color: var(--accent); }
.repo-form { display: flex; gap: 8px; }
.repo-form input { flex: 1; min-width: 0; font-family: var(--mono); font-size: 14.5px; }
input[type="text"], input[type="search"], select, textarea { width: 100%; background: var(--panel-2); border: 1px solid var(--line); border-radius: 9px; padding: 9px 11px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.chip { appearance: none; border: 1px solid var(--line); background: var(--panel); color: var(--ink); padding: 5px 11px; border-radius: 999px; cursor: pointer; font-size: 13px; text-align: left; }
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.mono { font-family: var(--mono); font-size: 12.5px; }
.drop { border: 1.5px dashed color-mix(in srgb, var(--accent) 55%, var(--line)); border-radius: 12px; padding: 22px 14px; display: grid; justify-items: center; gap: 4px; text-align: center; cursor: pointer; background: color-mix(in srgb, var(--accent-soft) 45%, transparent); }
.drop:hover, .drop.over { background: var(--accent-soft); }
.busy { margin: 10px 0 0; font-size: 13.5px; color: var(--ink-2); }
.busy::before { content: ""; display: inline-block; width: 10px; height: 10px; border-radius: 50%; border: 2px solid var(--accent); border-right-color: transparent; margin-right: 8px; animation: spin .8s linear infinite; vertical-align: -1px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* step 2: repo facts and file picker */
.repo-card { display: grid; gap: 4px; padding: 2px 0 12px; border-bottom: 1px solid var(--line); margin-bottom: 12px; }
.repo-name { font-family: var(--mono); font-size: 17px; font-weight: 700; overflow-wrap: anywhere; }
.repo-name a { color: var(--ink); text-decoration: none; }
.repo-name a:hover { color: var(--accent); text-decoration: underline; }
.repo-desc { color: var(--ink-2); margin: 0; }
.badges { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.badge { font-size: 12px; padding: 2px 9px; border-radius: 999px; background: var(--panel-2); border: 1px solid var(--line); color: var(--ink-2); white-space: nowrap; }
.badge.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.badge.sample { background: var(--accent-soft); color: var(--accent); border-color: transparent; font-weight: 700; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; margin-bottom: 12px; }
.fact { background: var(--panel-2); border: 1px solid var(--line); border-radius: 11px; padding: 10px 12px; min-width: 0; }
.fact-k { font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 700; }
.fact-v { font-size: 15px; font-weight: 600; margin-top: 2px; overflow-wrap: anywhere; }
.fact-s { font-size: 12.5px; color: var(--ink-2); margin-top: 2px; overflow-wrap: anywhere; }
.fact.wide { grid-column: 1 / -1; }
.langbar { display: flex; height: 10px; border-radius: 6px; overflow: hidden; background: var(--line); margin: 8px 0 6px; }
.langbar span { display: block; height: 100%; }
.langkey { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 12.5px; color: var(--ink-2); }
.langkey i { display: inline-block; width: 9px; height: 9px; border-radius: 3px; margin-right: 5px; vertical-align: 0; }
.outline-box { margin: 0 0 14px; }
.outline-box summary { cursor: pointer; font-weight: 600; color: var(--ink-2); font-size: 14px; }
.outline-box pre { background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font-size: 12.5px; line-height: 1.5; max-height: 320px; overflow: auto; margin: 8px 0 0; }
.files-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.files-head h3 { margin: 0; font-size: 15.5px; }
.seg { display: inline-flex; background: var(--panel-2); border: 1px solid var(--line); border-radius: 9px; padding: 2px; flex-wrap: wrap; }
.seg-btn { appearance: none; border: 0; background: none; padding: 5px 11px; border-radius: 7px; cursor: pointer; font-size: 13px; color: var(--ink-2); }
.seg-btn.on { background: var(--panel); color: var(--ink); box-shadow: 0 1px 2px rgba(0, 0, 0, .12); font-weight: 600; }
.budget { display: flex; align-items: center; gap: 10px; margin: 10px 0 6px; }
.budget-bar { flex: 1; height: 8px; border-radius: 5px; background: var(--panel-2); border: 1px solid var(--line); overflow: hidden; }
.budget-bar span { display: block; height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.budget-bar span.over { background: var(--warn); }
.file-list { list-style: none; margin: 0; padding: 0; border: 1px solid var(--line); border-radius: 11px; max-height: 420px; overflow: auto; }
.frow { display: grid; grid-template-columns: auto minmax(0, 1fr) auto auto; gap: 8px; align-items: center; padding: 7px 10px; }
.frow + .frow { border-top: 1px solid var(--line); }
.frow.off .fpath { color: var(--muted); text-decoration: line-through; }
.frow input { width: 16px; height: 16px; accent-color: var(--accent); }
.fpath { font-family: var(--mono); font-size: 13px; overflow-wrap: anywhere; line-height: 1.35; }
.fwhy { display: block; font-family: var(--font); font-size: 12px; color: var(--muted); }
.fwhy .warn { color: var(--warn); }
.ftag { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; padding: 2px 7px; border-radius: 6px; background: var(--panel-2); color: var(--ink-2); white-space: nowrap; }
.ftag.readme, .ftag.docs { background: var(--accent-soft); color: var(--accent); }
.ftag.manifest, .ftag.config, .ftag.ci { background: var(--warn-soft); color: var(--warn); }
.ftag.entry { background: var(--ok-soft); color: var(--ok); }
.fsize { font-size: 12px; color: var(--muted); white-space: nowrap; text-align: right; min-width: 64px; }
.add-file { display: flex; gap: 8px; margin: 10px 0 4px; }
.add-file input { flex: 1; min-width: 0; font-family: var(--mono); font-size: 13px; }
.audience { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin: 14px 0 4px; }
.run-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 12px; }
.meter { margin: 0; color: var(--muted); }
.gate { margin: 10px 0 0; padding: 9px 12px; border-radius: 9px; background: var(--accent-soft); color: var(--ink); font-size: 13.5px; }
.gate.warn { background: var(--warn-soft); color: var(--warn); }
.gate a { font-weight: 700; margin-left: 4px; }

/* step 3: the tour */
#result { margin-bottom: 16px; }
.result-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin: 6px 0 12px; }
.result-head h2 { margin: 0; font-family: var(--serif); font-size: 24px; overflow-wrap: anywhere; }
.result-head h2 span { font-family: var(--mono); font-size: .8em; }
.result-tools { display: flex; gap: 6px; flex-wrap: wrap; }
.turn { margin-bottom: 18px; }
.turn-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.turn-q { font-weight: 700; font-size: 16px; }
.pill { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 700; padding: 2px 9px; border-radius: 999px; }
.pill.ok { background: var(--ok-soft); color: var(--ok); }
.pill.warn { background: var(--warn-soft); color: var(--warn); }
.pill.bad { background: var(--bad-soft); color: var(--bad); }
.pill.example { background: var(--accent-soft); color: var(--accent); }
.turn-meta { font-size: 12px; color: var(--muted); margin-left: auto; }
.checkbar { display: flex; flex-wrap: wrap; gap: 6px 12px; align-items: center; background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; font-size: 13px; margin-bottom: 12px; }
.checkbar strong { font-weight: 700; }
.sec { padding: 14px 18px; margin-bottom: 12px; }
.sec-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 6px; }
.sec-head h3 { margin: 0; font-size: 15px; letter-spacing: .02em; text-transform: uppercase; color: var(--ink-2); }
.sec.summary .prose { font-size: 17.5px; }
.prose { font-size: 15.5px; line-height: 1.62; overflow-wrap: anywhere; }
.prose p { margin: 0 0 10px; }
.prose ul, .prose ol { margin: 0 0 10px; padding-left: 22px; }
.prose li { margin: 4px 0; }
.prose h4 { margin: 12px 0 6px; font-size: 15px; }
.prose code { font-size: .88em; background: var(--panel-2); padding: 1px 5px; border-radius: 5px; }
.prose blockquote { margin: 0 0 10px; padding-left: 12px; border-left: 3px solid var(--line); color: var(--ink-2); }
.codeblock { position: relative; margin: 6px 0 12px; }
.codeblock pre { background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; padding-right: 64px; overflow: auto; font-size: 13px; line-height: 1.5; margin: 0; }
.codeblock .copy { position: absolute; top: 6px; right: 6px; }
.pathchip { appearance: none; font-family: var(--mono); font-size: .86em; border: 1px solid transparent; padding: 1px 6px; border-radius: 6px; cursor: pointer; background: var(--accent-soft); color: var(--accent); }
.pathchip:hover { border-color: var(--accent); }
.pathchip.unread { background: var(--panel-2); color: var(--ink-2); border-color: var(--line); }
.pathchip.unknown { background: var(--bad-soft); color: var(--bad); cursor: help; border-style: dashed; border-color: var(--bad); }
.glance { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; }
.glance .fact-v { font-size: 14px; }
.arch { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.arch li { display: grid; grid-template-columns: minmax(120px, 34%) minmax(0, 1fr); gap: 12px; padding: 7px 0; border-top: 1px solid var(--line); align-items: start; }
.arch li:first-child { border-top: 0; }
.arch .arch-p { overflow-wrap: anywhere; }
.reading { margin: 0; padding-left: 0; list-style: none; counter-reset: rd; display: grid; gap: 8px; }
.reading li { counter-increment: rd; display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 10px; align-items: start; }
.reading li::before { content: counter(rd); width: 26px; height: 26px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 800; font-size: 13px; display: grid; place-items: center; }
.follow { display: flex; flex-wrap: wrap; gap: 6px; }
.partial-note { margin: 0 0 10px; padding: 8px 12px; border-radius: 9px; background: var(--warn-soft); color: var(--warn); font-size: 13.5px; }
.partial-note a { color: inherit; font-weight: 700; }
.sent { font-size: 13px; margin-top: 4px; }
.sent summary { cursor: pointer; color: var(--muted); }
.sent ul { margin: 6px 0 0; padding-left: 20px; }
.ask { padding: 14px 18px 16px; }
.ask label { display: block; margin-bottom: 6px; }
.ask textarea { font-size: 15px; min-height: 56px; }

/* progress */
.progress { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin-bottom: 14px; box-shadow: var(--shadow); }
.progress-top { display: flex; justify-content: space-between; font-size: 13px; color: var(--ink-2); margin-bottom: 6px; }
.stages { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.stage { font-size: 13.5px; color: var(--muted); display: flex; gap: 8px; align-items: center; }
.stage::before { content: ""; width: 9px; height: 9px; border-radius: 50%; border: 1.5px solid var(--line); flex: none; }
.stage.on { color: var(--ink); }
.stage.on::before { border-color: var(--accent); border-right-color: transparent; animation: spin .8s linear infinite; }
.stage.done { color: var(--ink-2); }
.stage.done::before { background: var(--accent); border-color: var(--accent); }
.streaming { white-space: pre-wrap; color: var(--ink-2); font-family: var(--mono); font-size: 12.5px; max-height: 180px; overflow: auto; margin-top: 8px; }

/* history */
.history { padding: 14px 18px; }
.history-head { display: flex; align-items: center; justify-content: space-between; }
.history-head h2 { margin: 0; font-size: 16px; }
#historyList { list-style: none; margin: 8px 0 0; padding: 0; }
.hist { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 6px; padding: 8px 0; border-top: 1px solid var(--line); }
.hist-open { appearance: none; border: 0; background: none; text-align: left; cursor: pointer; padding: 0; }
.hist-title { display: block; font-size: 14px; font-weight: 600; color: var(--ink); font-family: var(--mono); overflow-wrap: anywhere; }
.hist-sub { display: block; font-size: 12px; color: var(--muted); }
.hist-x { appearance: none; border: 0; background: none; color: var(--muted); cursor: pointer; font-size: 18px; line-height: 1; padding: 2px 6px; border-radius: 6px; }
.hist-x:hover { color: var(--bad); background: var(--bad-soft); }

/* file viewer */
.viewer { position: fixed; top: 0; right: 0; bottom: 0; width: min(620px, 100%); background: var(--panel); border-left: 1px solid var(--line); box-shadow: -10px 0 30px rgba(0, 0, 0, .14); z-index: 40; display: flex; flex-direction: column; }
.viewer-head { display: flex; gap: 10px; align-items: flex-start; justify-content: space-between; padding: 16px 16px 6px; }
.viewer-head h3 { margin: 0; font-size: 15px; font-family: var(--mono); overflow-wrap: anywhere; }
.viewer-tools { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; padding: 4px 16px 10px; border-bottom: 1px solid var(--line); }
.viewer-body { flex: 1; overflow: auto; margin: 0; padding: 12px 16px; font-size: 12.5px; line-height: 1.55; white-space: pre; tab-size: 4; }
.scrim { position: fixed; inset: 0; background: rgba(0, 0, 0, .28); z-index: 35; }

.toasts { position: fixed; left: 50%; bottom: 18px; transform: translateX(-50%); display: grid; gap: 8px; z-index: 60; width: min(560px, calc(100% - 32px)); }
.toast { background: var(--ink); color: var(--bg); padding: 10px 14px; border-radius: 10px; font-size: 14px; box-shadow: var(--shadow); transition: opacity .4s; }
.toast.err { background: var(--bad); color: #fff; }
.toast a { color: inherit; font-weight: 700; margin-left: 8px; }
.toast.gone { opacity: 0; }

.foot { border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.foot-in { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-top: 18px; padding-bottom: 30px; }
.foot p { margin: 4px 0; }

/* docs pages (api.html, tokens.html) */
.docpage { max-width: 880px; margin: 0 auto; padding: 24px 16px 40px; }
.docpage h1 { font-family: var(--serif); font-size: clamp(26px, 4vw, 34px); line-height: 1.15; margin: 8px 0 12px; }
.docpage h2 { font-size: 19px; margin: 28px 0 8px; }
.docpage h3 { font-size: 16px; margin: 18px 0 6px; }
.docpage code { font-size: .88em; background: var(--panel-2); padding: 1px 5px; border-radius: 5px; }
.docpage pre { background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; overflow: auto; font-size: 13px; line-height: 1.5; margin: 0; }
.docpage pre code { background: none; padding: 0; }
.docpage table { border-collapse: collapse; width: 100%; font-size: 14px; margin: 8px 0; display: block; overflow-x: auto; }
.docpage th, .docpage td { border-bottom: 1px solid var(--line); text-align: left; padding: 6px 8px; vertical-align: top; }
.mono { font-family: var(--mono); overflow-wrap: anywhere; }
.statebox { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.statebox p { margin: 4px 0 0; }
.tokenbox { background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font-family: var(--mono); font-size: 13px; overflow-wrap: anywhere; }
.tokenrow { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; }
.codegroup { margin: 10px 0 16px; }
.codegroup .tabs { display: flex; flex-wrap: wrap; gap: 2px; margin-bottom: -1px; }
.codegroup .tab { appearance: none; border: 1px solid var(--line); border-bottom: 0; background: var(--panel); color: var(--ink-2); padding: 5px 10px; border-radius: 8px 8px 0 0; cursor: pointer; font-size: 12.5px; }
.codegroup .tab.active { background: var(--panel-2); color: var(--ink); font-weight: 700; }
.codegroup pre { border-top-left-radius: 0; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}
@media (max-width: 640px) {
  .hide-sm { display: none; }
  .top-in { gap: 6px; padding: 8px 12px; }
  .brand span { font-size: 15px; }
  .credits { display: none; }
  .step { padding: 14px 14px 16px; }
  .sec { padding: 12px 14px; }
  .repo-form { flex-direction: column; }
  .frow { grid-template-columns: auto minmax(0, 1fr) auto; }
  .frow .ftag { display: none; }
  .arch li { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .viewer { top: auto; height: 82vh; width: 100%; border-left: 0; border-top: 1px solid var(--line); border-radius: 16px 16px 0 0; }
  .run-row .btn.primary { width: 100%; }
}