/* ═══════════════════════════════════════════════════════════
   studio-kaggle · Google AI Studio design language
   system-adaptive: light by default, dark on device preference,
   manual override via [data-theme]
   ═══════════════════════════════════════════════════════════ */

:root {
  --bg: #f8f9fa;
  --bg-deep: #ffffff;
  --surface: #ffffff;
  --surface-2: #f1f3f4;
  --border: rgba(0,0,0,0.10);
  --border-strong: rgba(0,0,0,0.18);
  --text: #202124;
  --white: #111114;
  --text-2: #5f6368;
  --text-3: #80868b;
  --blue: #1a73e8;
  --blue-bright: #1967d2;
  --blue-soft: rgba(26,115,232,0.08);
  --blue-border: rgba(26,115,232,0.40);
  --amber: #b06000;
  --amber-soft: rgba(176,96,0,0.08);
  --green: #188038;
  --disp: "Google Sans Flex", "Google Sans", -apple-system, sans-serif;
  --sans: "Inter", -apple-system, "Helvetica Neue", sans-serif;
  --mono: "Google Sans Code", "Roboto Mono", Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121317;
    --bg-deep: #0e0f12;
    --surface: #1a1b1f;
    --surface-2: #212226;
    --border: rgba(255,255,255,0.09);
    --border-strong: rgba(255,255,255,0.15);
    --text: #e8eaed;
    --white: #ffffff;
    --text-2: #9aa0a6;
    --text-3: #6b7076;
    --blue: #2e96ff;
    --blue-bright: #6bb6ff;
    --blue-soft: rgba(46,150,255,0.12);
    --blue-border: rgba(46,150,255,0.42);
    --amber: #f9ab00;
    --amber-soft: rgba(249,171,0,0.10);
    --green: #5bd18b;
  }
}

:root[data-theme="dark"] {
  --bg: #121317;
  --bg-deep: #0e0f12;
  --surface: #1a1b1f;
  --surface-2: #212226;
  --border: rgba(255,255,255,0.09);
  --border-strong: rgba(255,255,255,0.15);
  --text: #e8eaed;
  --white: #ffffff;
  --text-2: #9aa0a6;
  --text-3: #6b7076;
  --blue: #2e96ff;
  --blue-bright: #6bb6ff;
  --blue-soft: rgba(46,150,255,0.12);
  --blue-border: rgba(46,150,255,0.42);
  --amber: #f9ab00;
  --amber-soft: rgba(249,171,0,0.10);
  --green: #5bd18b;
}

html { background: var(--bg); }
* { margin: 0; padding: 0; box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.006em;
  transition: background .25s, color .25s;
}
a { color: inherit; text-decoration: none; }
button, input { font: inherit; color: inherit; }
::selection { background: var(--blue-soft); }

/* ── Gate ─────────────────────────────────────────────── */
.gate {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(1100px 560px at 72% -10%, var(--blue-soft), transparent 62%),
    var(--bg);
  padding: 24px;
}
.gate-card { width: 100%; max-width: 400px; text-align: center; }
.gate-mark {
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.3em;
  color: var(--text-3); text-transform: uppercase; margin-bottom: 22px;
}
.gate-mark span { color: var(--blue); }
.gate-title { font-family: var(--disp); font-size: 32px; font-weight: 500; letter-spacing: -0.02em; color: var(--white); }
.gate-sub { color: var(--text-2); font-size: 14px; margin: 8px 0 26px; }
.gate input {
  width: 100%; padding: 13px 16px; border: 1px solid var(--border-strong);
  border-radius: 10px; background: var(--surface); outline: none; text-align: center;
  font-family: var(--mono); font-size: 15px;
}
.gate input:focus { border-color: var(--blue-border); }
.gate input::placeholder { color: var(--text-3); }
.gate button {
  margin-top: 12px; width: 100%; padding: 13px;
  border: none; border-radius: 10px; background: var(--blue); color: #fff; font-weight: 500; cursor: pointer;
}
.gate button:hover { background: var(--blue-bright); }

/* ── Topbar ───────────────────────────────────────────── */
.topbar { border-bottom: 1px solid var(--border); background: var(--bg-deep); position: sticky; top: 0; z-index: 20; }
.topbar-in {
  max-width: 880px; margin: 0 auto; padding: 13px clamp(20px, 4vw, 40px);
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
}
.wordmark { font-family: var(--mono); font-size: 13px; flex-shrink: 0; }

/* ── Tabs ─────────────────────────────────────────────── */
.tabs { display: flex; gap: 2px; }
.tabs a {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.06em;
  color: var(--text-3); padding: 6px 12px; border-radius: 999px;
  border: 1px solid transparent; white-space: nowrap;
}
.tabs a:hover { color: var(--text-2); border-color: var(--border); }
.tabs a[aria-current="page"] { color: var(--blue); background: var(--blue-soft); border-color: var(--blue-border); }
@media (max-width: 560px) {
  .topbar-in { flex-wrap: wrap; row-gap: 10px; }
  .tabs { order: 3; width: 100%; overflow-x: auto; }
  .tabs a { padding: 5px 10px; }
}
.wm-link:hover .wm-a { color: var(--blue-bright); }
.wm-a { color: var(--text-2); }
.wm-sep { color: var(--text-3); margin: 0 2px; }
.wm-b { color: var(--blue); }
.theme-btn {
  width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--border);
  background: var(--surface); color: var(--text-2); font-size: 14px; line-height: 1; cursor: pointer;
}
.theme-btn:hover { border-color: var(--blue-border); color: var(--blue-bright); }

/* ── Layout ───────────────────────────────────────────── */
main { max-width: 880px; margin: 0 auto; padding: 0 clamp(20px, 4vw, 40px) 72px; }

.hero { padding: clamp(44px, 8vh, 88px) 0 4px; }
.hero .eyebrow {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--text-3); margin-bottom: 14px;
}
.hero h1 {
  font-family: var(--disp); font-weight: 500;
  font-size: clamp(31px, 4.8vw, 50px); line-height: 1.08;
  letter-spacing: -0.028em; color: var(--white); max-width: 15ch;
}
.hero .deck { max-width: 62ch; margin-top: 18px; color: var(--text-2); font-size: 16.5px; }
.hero .deck strong { color: var(--text); font-weight: 500; }

.group { padding-top: 52px; }
.group > h2 {
  font-family: var(--mono); font-weight: 500; font-size: 11.5px;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-3);
  padding-bottom: 12px; margin-bottom: 22px; border-bottom: 1px solid var(--border);
}
.lede { max-width: 66ch; color: var(--text-2); margin-bottom: 26px; }

/* ── Numbered notes (the gap) ─────────────────────────── */
.note { display: grid; grid-template-columns: 26px 1fr; column-gap: 16px; margin-bottom: 24px; }
.note-n {
  font-family: var(--mono); font-size: 11.5px; color: var(--blue);
  padding-top: 4px; letter-spacing: 0.04em;
}
.note h3 { font-family: var(--disp); font-weight: 500; font-size: 17px; color: var(--white); letter-spacing: -0.012em; }
.note p { color: var(--text-2); margin-top: 5px; max-width: 68ch; font-size: 14.5px; }

/* ── Move cards ───────────────────────────────────────── */
.move {
  border: 1px solid var(--border); border-radius: 14px;
  background: var(--surface); padding: 22px clamp(18px, 3vw, 26px);
  margin-bottom: 14px;
}
.move:hover { border-color: var(--border-strong); }
.move-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.move-n { font-family: var(--mono); font-size: 11.5px; color: var(--blue); letter-spacing: 0.06em; }
.move-head h3 { font-family: var(--disp); font-weight: 500; font-size: 19px; color: var(--white); letter-spacing: -0.015em; }
.move-one { margin-top: 7px; color: var(--text); font-size: 15.5px; max-width: 64ch; }
.move-grid { margin-top: 18px; display: grid; grid-template-columns: 92px 1fr; column-gap: 18px; row-gap: 11px; }
.move-grid dt {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.11em;
  text-transform: uppercase; color: var(--text-3); padding-top: 3px;
}
.move-grid dd { color: var(--text-2); font-size: 14.5px; max-width: 68ch; }
.move-grid dd.risk { color: var(--text-3); }
.tag {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.07em; text-transform: uppercase;
  border-radius: 999px; padding: 2px 9px; border: 1px solid var(--blue-border);
  color: var(--blue); background: var(--blue-soft); margin-left: auto;
}
.tag.warm { color: var(--amber); border-color: color-mix(in srgb, var(--amber) 42%, transparent); background: var(--amber-soft); }

/* ═══ Prototype: contributor view ═════════════════════ */
.vswitch { display: flex; gap: 4px; margin: 26px 0 0; }
.vswitch button {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.06em;
  border: 1px solid var(--border); background: none; color: var(--text-3);
  border-radius: 999px; padding: 7px 15px; cursor: pointer;
}
.vswitch button:hover { color: var(--text-2); }
.vswitch button[aria-pressed="true"] { color: var(--blue); background: var(--blue-soft); border-color: var(--blue-border); }

.sub-card { border: 1px solid var(--border); border-radius: 14px; background: var(--surface); padding: 20px clamp(16px,3vw,24px); }
.sub-h { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.11em; text-transform: uppercase; color: var(--text-3); margin-bottom: 14px; }
.sub-g { display: grid; grid-template-columns: 124px 1fr; gap: 7px 18px; }
.sub-g dt { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); padding-top: 3px; }
.sub-g dd { font-family: var(--mono); font-size: 11.5px; color: var(--text-2); word-break: break-word; }
.sub-g dd.hi { color: var(--text); }

.runbtn {
  margin-top: 18px; border: none; border-radius: 10px; background: var(--blue); color: #fff;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 11px 20px; cursor: pointer;
}
.runbtn:hover { background: var(--blue-bright); }
.runbtn:disabled { opacity: 0.45; cursor: default; }

.chk { display: grid; grid-template-columns: 20px 1fr auto; gap: 12px; align-items: baseline; padding: 10px 0; border-bottom: 1px solid var(--border); }
.chk:last-of-type { border-bottom: none; }
.chk-i { font-family: var(--mono); font-size: 12px; color: var(--text-3); }
.chk.pass .chk-i { color: var(--green); }
.chk.fail .chk-i { color: var(--amber); }
.chk.run .chk-i { color: var(--blue); }
.chk-n { font-size: 13.8px; color: var(--text-3); }
.chk.pass .chk-n, .chk.fail .chk-n, .chk.run .chk-n { color: var(--text); }
.chk-d { font-family: var(--mono); font-size: 10.5px; color: var(--text-3); white-space: nowrap; }
.chk-m { grid-column: 2 / -1; font-family: var(--mono); font-size: 11px; color: var(--amber); margin-top: 6px; line-height: 1.65; white-space: pre-wrap; }
.verdict { margin-top: 16px; padding-top: 15px; border-top: 1px solid var(--border); font-size: 14.5px; color: var(--text-2); }
.verdict b { font-family: var(--disp); font-size: 16px; font-weight: 500; color: var(--white); display: block; margin-bottom: 5px; }
.verdict.ok b { color: var(--green); }
.verdict.no b { color: var(--amber); }

.two { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; align-items: start; margin-top: 22px; }
@media (max-width: 900px) { .two { grid-template-columns: 1fr; } .sub-g { grid-template-columns: 1fr; gap: 2px 0; } .sub-g dt { padding-top: 9px; } }

/* ═══ Prototype console ═══════════════════════════════ */
main.wide { max-width: 1220px; }
body:has(main.wide) .topbar-in { max-width: 1220px; }
.strip {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  border: 1px solid color-mix(in srgb, var(--amber) 38%, transparent);
  background: var(--amber-soft); border-radius: 10px;
  padding: 10px 14px; margin: 26px 0 4px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.07em;
  text-transform: uppercase; color: var(--amber);
}
.strip b { font-weight: 500; }
.strip span { color: var(--text-3); text-transform: none; letter-spacing: 0; font-size: 11.5px; }

.badge {
  font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.08em; text-transform: uppercase;
  border-radius: 4px; padding: 2px 6px; border: 1px solid var(--border-strong); color: var(--text-3);
  white-space: nowrap;
}
.badge.real { color: var(--green); border-color: color-mix(in srgb, var(--green) 42%, transparent); }
.badge.policy { color: var(--amber); border-color: color-mix(in srgb, var(--amber) 42%, transparent); }

.console { display: grid; grid-template-columns: 268px minmax(0, 1fr); gap: 26px; align-items: start; margin-top: 26px; }
.console > * { min-width: 0; }

.panel-h {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-3); margin-bottom: 12px; display: flex; align-items: center; gap: 8px;
}

.fstage {
  display: block; width: 100%; text-align: left; cursor: pointer;
  background: none; border: 1px solid transparent; border-radius: 9px;
  padding: 9px 11px; margin-bottom: 2px;
}
.fstage:hover { background: var(--surface); border-color: var(--border); }
.fstage[aria-pressed="true"] { background: var(--blue-soft); border-color: var(--blue-border); }
.fstage-t { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.fstage-n { font-size: 13.5px; color: var(--text); }
.fstage-v { font-family: var(--mono); font-size: 12px; color: var(--blue); }
.fstage-bar { height: 3px; border-radius: 2px; background: var(--surface-2); margin-top: 7px; overflow: hidden; }
.fstage-bar i { display: block; height: 100%; background: var(--blue); border-radius: 2px; }
.fstage-r { font-family: var(--mono); font-size: 11.5px; color: var(--text-3); margin-top: 5px; letter-spacing: 0.03em; }

.pools { display: flex; gap: 4px; margin-bottom: 12px; flex-wrap: wrap; }
.pools button {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.07em; text-transform: uppercase;
  border: 1px solid var(--border); background: none; color: var(--text-3);
  border-radius: 999px; padding: 4px 11px; cursor: pointer;
}
.pools button:hover { color: var(--text-2); }
.pools button[aria-pressed="true"] { color: var(--blue); background: var(--blue-soft); border-color: var(--blue-border); }

.tblwrap { border: 1px solid var(--border); border-radius: 12px; overflow-x: auto; overflow-y: hidden; background: var(--surface); max-width: 100%; }
table.tbl { min-width: 640px; }
table.tbl { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.tbl th {
  font-family: var(--mono); font-weight: 400; font-size: 9.5px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-3); text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); white-space: nowrap;
}
.tbl td { padding: 9px 12px; border-bottom: 1px solid var(--border); color: var(--text-2); white-space: nowrap; }
.tbl tr:last-child td { border-bottom: none; }
.tbl tbody tr { cursor: pointer; }
.tbl tbody tr:hover td { background: var(--surface-2); color: var(--text); }
.tbl tbody tr[aria-selected="true"] td { background: var(--blue-soft); }
.tbl .mono { font-family: var(--mono); font-size: 11.5px; }
.tbl .id { color: var(--text); }
.tbl .rej { color: var(--amber); }
.pl { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.07em; border-radius: 4px; padding: 2px 6px; border: 1px solid var(--border-strong); color: var(--text-3); }
.pl.TRAIN { color: var(--text-2); }
.pl.CALIBRATION { color: var(--blue); border-color: var(--blue-border); }
.pl.AUDIT { color: var(--green); border-color: color-mix(in srgb, var(--green) 42%, transparent); }
.pl.REJECTED { color: var(--amber); border-color: color-mix(in srgb, var(--amber) 42%, transparent); }

.drawer { margin-top: 18px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); padding: 18px 20px; }
.drawer-h { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 4px; }
.drawer-h b { font-family: var(--mono); font-size: 13.5px; color: var(--white); font-weight: 500; }
.drawer-title { color: var(--text-2); font-size: 14px; margin-bottom: 14px; }
.drawer-g { display: grid; grid-template-columns: 132px 1fr; gap: 7px 18px; }
.drawer-g dt { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); padding-top: 3px; }
.drawer-g dd { font-family: var(--mono); font-size: 11.5px; color: var(--text-2); word-break: break-all; }
.drawer-g dd.hi { color: var(--text); }
.drawer-note { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--border); font-size: 13px; color: var(--text-2); }

@media (max-width: 900px) {
  .console { grid-template-columns: 1fr; gap: 22px; }
  .drawer-g { grid-template-columns: 1fr; gap: 2px 0; }
  .drawer-g dt { padding-top: 9px; }
}

/* ── Brief: the beat ──────────────────────────────────── */
.beat {
  font-family: var(--disp); font-weight: 500;
  font-size: clamp(19px, 2.5vw, 25px); line-height: 1.34; letter-spacing: -0.019em;
  color: var(--white); max-width: 46ch; margin-top: 30px;
  padding-left: 18px; border-left: 2px solid var(--blue);
}
.beat code { font-size: 0.82em; background: none; padding: 0; }

/* ── Brief: one concrete instance ─────────────────────── */
.spec {
  font-family: var(--mono); font-size: 12.5px; line-height: 1.8;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px 20px; overflow-x: auto; color: var(--text-2); white-space: pre;
}
.spec b { color: var(--text); font-weight: 500; }
.spec u { color: var(--blue); text-decoration: none; }

/* ── Brief: closing line ──────────────────────────────── */
.closer {
  margin-top: 46px; padding-top: 26px; border-top: 1px solid var(--border);
  font-family: var(--disp); font-weight: 500; font-size: 17.5px; line-height: 1.5;
  letter-spacing: -0.013em; color: var(--text); max-width: 58ch;
}

/* ── Brief: anatomy of one environment ────────────────── */
.anat { border-top: 1px solid var(--border); }
.anat-r { display: grid; grid-template-columns: 158px 1fr; gap: 20px; padding: 14px 0; border-bottom: 1px solid var(--border); align-items: baseline; }
.anat-k { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.11em; text-transform: uppercase; color: var(--blue); }
.anat-v { font-size: 15px; color: var(--text); max-width: 62ch; }
.anat-v span { color: var(--text-2); }
.after-anat { margin-top: 20px; color: var(--text-2); font-size: 15px; max-width: 66ch; }
.after-anat strong { color: var(--text); font-weight: 500; }
.prose { color: var(--text-2); font-size: 15px; max-width: 68ch; }
.prose + .prose { margin-top: 14px; }
.prose strong { color: var(--text); font-weight: 500; }

/* ── Brief: one-line moves ────────────────────────────── */
.line { display: grid; grid-template-columns: 24px 1fr auto; gap: 3px 16px; padding: 13px 0; border-bottom: 1px solid var(--border); align-items: baseline; }
.line:first-of-type { border-top: 1px solid var(--border); }
.line-n { font-family: var(--mono); font-size: 11.5px; color: var(--blue); }
.line-t { font-size: 14.6px; color: var(--text-2); max-width: 60ch; }
.line-t b { display: block; font-family: var(--disp); font-weight: 500; font-size: 15.5px; color: var(--white); letter-spacing: -0.012em; }
.line .tag { margin-left: 0; align-self: center; }

/* ── Brief: the ask ───────────────────────────────────── */
.ask { border: 1px solid var(--blue-border); background: var(--blue-soft); border-radius: 14px; padding: 22px clamp(18px, 3vw, 26px); }
.ask ol { margin: 0; padding-left: 19px; }
.ask li { color: var(--text); font-size: 15px; margin-bottom: 11px; padding-left: 5px; max-width: 62ch; }
.ask li:last-child { margin-bottom: 0; }
.ask li b { font-weight: 500; }
.ask .after { margin-top: 15px; padding-top: 13px; border-top: 1px solid var(--blue-border); color: var(--text-2); font-size: 13.8px; }

/* ── Brief: link to the long version ──────────────────── */
.more { display: block; margin-top: 44px; border: 1px solid var(--border); border-radius: 14px; padding: 19px 22px; background: var(--surface); }
.more:hover { border-color: var(--blue-border); }
.more b { display: block; font-family: var(--disp); font-weight: 500; font-size: 16px; color: var(--white); margin-bottom: 3px; }
.more span { color: var(--text-2); font-size: 14px; }
.more:hover b { color: var(--blue-bright); }

/* ── Swap rows (what the review killed) ───────────────── */
.swap { padding: 18px 0; border-bottom: 1px solid var(--border); }
.swap:first-of-type { border-top: 1px solid var(--border); }
.swap-t { font-family: var(--disp); font-weight: 500; font-size: 15.5px; color: var(--text-2); }
.swap-t s { text-decoration-color: var(--amber); text-decoration-thickness: 1px; text-underline-offset: 2px; }
.swap-g { margin-top: 10px; display: grid; grid-template-columns: 1fr 1fr; gap: 14px 28px; }
.swap-g > div { font-size: 14.3px; color: var(--text-2); max-width: 56ch; }
.swap-g b {
  display: block; font-family: var(--mono); font-weight: 400; font-size: 10.5px;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); margin-bottom: 4px;
}
.swap-g .to { color: var(--text); }
.swap-g .to b { color: var(--blue); }

/* ── Evidence pills ───────────────────────────────────── */
.ev {
  font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.08em; text-transform: uppercase;
  border-radius: 999px; padding: 1px 7px; border: 1px solid var(--border-strong);
  color: var(--text-3); margin-left: 6px; white-space: nowrap; font-style: normal;
}
.ev.v { color: var(--green); border-color: color-mix(in srgb, var(--green) 42%, transparent); }

/* ── Cost rows ────────────────────────────────────────── */
.cost { display: grid; grid-template-columns: 190px 1fr 110px; gap: 6px 22px; padding: 13px 0; border-bottom: 1px solid var(--border); align-items: baseline; }
.cost:first-of-type { border-top: 1px solid var(--border); }
.cost-l { font-family: var(--disp); font-weight: 500; font-size: 14.5px; color: var(--white); }
.cost-a { font-size: 13.8px; color: var(--text-2); }
.cost-n { font-family: var(--mono); font-size: 13px; color: var(--blue); text-align: right; white-space: nowrap; }
.cost.total .cost-l, .cost.total .cost-n { color: var(--amber); }
.cost.total { border-bottom: none; }

/* ── Rule list (security / incentives) ────────────────── */
.rules { border-top: 1px solid var(--border); }
.rule {
  display: grid; grid-template-columns: 172px 1fr; column-gap: 22px;
  padding: 17px 0; border-bottom: 1px solid var(--border);
}
.rule dt { font-family: var(--disp); font-weight: 500; font-size: 15px; color: var(--white); letter-spacing: -0.01em; }
.rule dt .sub { display: block; font-family: var(--mono); font-weight: 400; font-size: 10.5px; letter-spacing: 0.09em; text-transform: uppercase; color: var(--text-3); margin-top: 3px; }
.rule dd { color: var(--text-2); font-size: 14.5px; max-width: 70ch; }
.rule dd em { font-style: normal; color: var(--text); }
code {
  font-family: var(--mono); font-size: 0.88em; color: var(--blue);
  background: var(--blue-soft); border-radius: 5px; padding: 1px 5px;
}

/* ── Callout ──────────────────────────────────────────── */
.callout {
  margin-top: 24px; border-left: 2px solid var(--amber);
  background: var(--amber-soft); border-radius: 0 10px 10px 0;
  padding: 15px 18px; color: var(--text-2); font-size: 14.5px; max-width: 72ch;
}
.callout b { color: var(--text); font-weight: 500; }

/* ── Phases ───────────────────────────────────────────── */
.phase {
  display: grid; grid-template-columns: 96px 1fr 230px; column-gap: 22px; align-items: baseline;
  padding: 16px 0; border-bottom: 1px solid var(--border);
}
.phase:first-child { border-top: 1px solid var(--border); }
.phase-q { font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--blue); }
.phase-t { font-family: var(--disp); font-weight: 500; font-size: 15.5px; color: var(--white); }
.phase-t span { display: block; font-family: var(--sans); font-weight: 400; font-size: 14px; color: var(--text-2); margin-top: 3px; max-width: 52ch; }
.phase-g { font-family: var(--mono); font-size: 11.5px; color: var(--text-3); line-height: 1.55; }

/* ── Metrics ──────────────────────────────────────────── */
.metric { display: grid; grid-template-columns: 1fr auto; gap: 8px 22px; padding: 13px 0; border-bottom: 1px solid var(--border); align-items: baseline; }
.metric:first-child { border-top: 1px solid var(--border); }
.metric-n { font-size: 14.8px; color: var(--text); max-width: 62ch; }
.metric-d { font-family: var(--mono); font-size: 11px; letter-spacing: 0.09em; text-transform: uppercase; color: var(--text-3); white-space: nowrap; }
.metric-d.down { color: var(--green); }
.metric-d.up { color: var(--blue); }

.foot {
  margin-top: 60px; padding-top: 18px; border-top: 1px solid var(--border);
  font-family: var(--mono); font-size: 11.5px; color: var(--text-3); line-height: 1.9;
}
.foot a { color: var(--text-3); text-decoration: underline; text-decoration-color: var(--border-strong); text-underline-offset: 3px; }
.foot a:hover { color: var(--blue-bright); }

/* ── Mobile ───────────────────────────────────────────── */
@media (max-width: 720px) {
  body { font-size: 14.5px; }
  .hero h1 { max-width: none; }
  .move-grid { grid-template-columns: 1fr; row-gap: 4px; }
  .move-grid dt { padding-top: 10px; }
  .move-grid dd { padding-bottom: 4px; }
  .rule { grid-template-columns: 1fr; row-gap: 5px; }
  .swap-g { grid-template-columns: 1fr; }
  .anat-r { grid-template-columns: 1fr; gap: 5px; }
  .line { grid-template-columns: 20px 1fr; }
  .line .tag { grid-column: 2; margin-top: 6px; justify-self: start; }
  .cost { grid-template-columns: 1fr auto; }
  .cost-a { grid-column: 1 / -1; }
  .phase { grid-template-columns: 1fr; row-gap: 7px; }
  .phase-g { color: var(--text-2); }
  .metric { grid-template-columns: 1fr; }
  .tag { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

/* ═══ Big challenge cards ═════════════════════════════ */
.bigcard {
  border: 1px solid var(--border); border-radius: 20px; background: var(--surface);
  padding: clamp(24px, 3.4vw, 38px); margin-bottom: 22px;
}
.bc-head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.bc-n { font-family: var(--mono); font-size: 12px; color: var(--blue); letter-spacing: 0.08em; }
.bc-head h3 {
  font-family: var(--disp); font-weight: 500; font-size: clamp(23px, 2.9vw, 31px);
  letter-spacing: -0.024em; color: var(--white); line-height: 1.15;
}
.bc-one { margin-top: 12px; font-size: 16.5px; color: var(--text-2); max-width: 64ch; }
.bc-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.bc-chip {
  border: 1px solid var(--border); border-radius: 11px; padding: 9px 15px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3);
}
.bc-chip b {
  display: block; color: var(--text); font-family: var(--disp); font-weight: 500;
  font-size: 15.5px; letter-spacing: -0.01em; text-transform: none; margin-top: 3px;
}
.bc-chip.ok b { color: var(--green); }
.bc-sec { margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--border); }
.bc-h {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--text-3); margin-bottom: 14px; display: flex; align-items: center; gap: 9px;
}
.bc-sec > p { color: var(--text-2); font-size: 14.8px; max-width: 68ch; margin-bottom: 10px; }
.bc-sec > p strong { color: var(--text); font-weight: 500; }
.cond { display: grid; grid-template-columns: 24px 1fr; gap: 12px; padding: 8px 0; font-size: 14.8px; color: var(--text-2); }
.cond i { font-family: var(--mono); font-size: 11px; color: var(--blue); font-style: normal; padding-top: 3px; }
.cond b { color: var(--text); font-weight: 500; }
.matrix {
  font-family: var(--mono); font-size: 11.5px; color: var(--text-2);
  display: block; margin: 10px 0 12px; line-height: 2;
}


/* ═══ Touch targets ═══════════════════════════════════ */
@media (pointer: coarse) {
  .tabs a { padding: 11px 14px; }
  .wordmark a { display: inline-block; padding: 9px 2px; }
  .theme-btn { width: 40px; height: 40px; font-size: 16px; }
  .foot a { display: inline-block; padding: 6px 0; }
  .move-grid dd a, .bc-sec a, .after-anat a, .prose a, .lede a { display: inline-block; padding: 4px 0; }
  .runbtn { padding: 14px 22px; }
  .line-t a { display: inline-block; padding: 4px 0; }
  .foot a, .fstage-r a, p a, dd a, td a { display: inline-block; min-height: 32px; line-height: 32px; }
}

/* ═══ Foldable detail ═════════════════════════════════ */
.fold { border-top: 1px solid var(--border); margin-top: 8px; }
.fold details { border-bottom: 1px solid var(--border); }
.fold summary {
  cursor: pointer; padding: 17px 0; list-style: none;
  font-family: var(--disp); font-weight: 500; font-size: 15.5px; letter-spacing: -0.012em;
  color: var(--white); display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.fold summary::-webkit-details-marker { display: none; }
.fold summary::after { content: '+'; font-family: var(--mono); font-size: 16px; color: var(--text-3); flex-shrink: 0; }
.fold details[open] summary::after { content: '–'; color: var(--blue); }
.fold summary:hover { color: var(--blue-bright); }
.fold summary span { font-family: var(--sans); font-weight: 400; font-size: 13.5px; color: var(--text-3); }
.fold-b { padding: 0 0 24px; }
.fold-b p { color: var(--text-2); font-size: 14.5px; max-width: 70ch; margin-bottom: 11px; }
.fold-b p strong { color: var(--text); font-weight: 500; }
.fold-b p:last-child { margin-bottom: 0; }
.fold-b .line { border-bottom: none; padding: 9px 0; }
.fold-b .line:first-of-type { border-top: none; }

/* ═══════════════════════════════════════════════════════
   COMPONENT SYSTEM — one container, three densities.
   Everything on both pages is a card. No hairline rows.
   ═══════════════════════════════════════════════════════ */
.cards { display: grid; gap: 12px; }
.cards.duo { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }

.card {
  border: 1px solid var(--border); border-radius: 16px;
  background: var(--surface); padding: 20px 22px;
}
.card.lg { border-radius: 20px; padding: clamp(24px, 3.4vw, 36px); }
.card.warn { border-color: color-mix(in srgb, var(--amber) 34%, transparent); background: var(--amber-soft); }
.card.link { display: block; }
.card.link:hover { border-color: var(--blue-border); }
.card.link:hover .card-h h3 { color: var(--blue-bright); }

.card-h { display: flex; align-items: baseline; gap: 12px; }
.card-h h3 { min-width: 0; }
.card-n { font-family: var(--mono); font-size: 11.5px; color: var(--blue); letter-spacing: 0.06em; flex-shrink: 0; }
.card-h h3 {
  font-family: var(--disp); font-weight: 500; font-size: 17px;
  color: var(--white); letter-spacing: -0.014em; line-height: 1.25;
}
.card.lg .card-h h3 { font-size: clamp(22px, 2.7vw, 29px); letter-spacing: -0.024em; line-height: 1.15; }

.card-b { margin-top: 8px; color: var(--text-2); font-size: 14.6px; max-width: 72ch; }
.card.lg .card-b { margin-top: 12px; font-size: 16.5px; max-width: 64ch; }
.card-b + .card-b { margin-top: 11px; }
.card-b strong { color: var(--text); font-weight: 500; }
.card.warn .card-b { color: var(--text-2); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.chip {
  border: 1px solid var(--border); border-radius: 11px; padding: 9px 14px;
  font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-3);
}
.chip b {
  display: block; margin-top: 3px; color: var(--text); font-family: var(--disp);
  font-weight: 500; font-size: 15px; letter-spacing: -0.01em; text-transform: none;
}
.chip.ok b { color: var(--green); }

.card-sec { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); }
.card-sec-h {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--text-3); margin-bottom: 11px; display: flex; align-items: center; gap: 9px; flex-wrap: wrap;
}
.card-sec p { color: var(--text-2); font-size: 14.6px; max-width: 70ch; margin-bottom: 10px; }
.card-sec p:last-child { margin-bottom: 0; }
.card-sec p strong { color: var(--text); font-weight: 500; }

/* fold — a card that opens */
.card details { margin: -20px -22px; }
.card summary {
  cursor: pointer; list-style: none; padding: 20px 22px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  font-family: var(--disp); font-weight: 500; font-size: 16px;
  letter-spacing: -0.014em; color: var(--white);
}
.card summary::-webkit-details-marker { display: none; }
.card summary em {
  font-style: normal; font-family: var(--sans); font-weight: 400;
  font-size: 13px; color: var(--text-3); margin-left: auto;
}
.card summary::after { content: '+'; font-family: var(--mono); font-size: 17px; color: var(--text-3); flex-shrink: 0; }
.card details[open] summary::after { content: '–'; color: var(--blue); }
.card summary:hover { color: var(--blue-bright); }
.card details > .fold-body { padding: 0 22px 22px; }
.card details > .fold-body > .card-b:first-child { margin-top: 0; }

@media (max-width: 560px) {
  .card summary em { display: none; }
  .chips { gap: 6px; }
  .chip { padding: 8px 12px; }
}

/* ═══ The ask — first block, highest contrast ═════════ */
.ask-card { border-color: var(--blue-border); background: var(--blue-soft); }
.ask-card dl { display: grid; grid-template-columns: 128px minmax(0,1fr); gap: 13px 20px; }
.ask-card dt {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.11em; text-transform: uppercase;
  color: var(--blue); padding-top: 4px;
}
.ask-card dd { font-size: 15.5px; color: var(--text); }
.ask-card dd strong { font-weight: 500; color: var(--white); }
@media (max-width: 620px) {
  .ask-card dl { grid-template-columns: 1fr; gap: 3px; }
  .ask-card dt { padding-top: 14px; }
  .ask-card dt:first-child { padding-top: 0; }
}
.axis { font-size: 14.5px; color: var(--text-2); margin-top: 14px; max-width: 66ch; }
.axis strong { color: var(--text); font-weight: 500; }
.risk-line { margin-top: 14px; font-size: 13.8px; color: var(--text-3); max-width: 68ch; }
.risk-line b { font-family: var(--mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); font-weight: 400; }

/* ═══ Salient call-to-action ══════════════════════════ */
.cta-card { border-color: var(--blue-border); background: var(--blue-soft); text-align: center; }
.cta-card .card-h { justify-content: center; }
.cta-card .card-b { max-width: 56ch; margin-left: auto; margin-right: auto; }
.cta-btn {
  display: inline-block; margin-top: 18px; background: var(--blue); color: #fff;
  border-radius: 12px; padding: 15px 30px; font-family: var(--disp); font-weight: 500;
  font-size: 16px; letter-spacing: -0.008em; border: none;
}
.cta-btn:hover { background: var(--blue-bright); }
@media (max-width: 560px) { .cta-btn { display: block; padding: 16px 24px; } }