/* ============================================================
   2WBB0 Calculus — Theory Trainer
   Part of TA Desk. Load ../assets/css/tokens.css before this.
   ============================================================ */

/* ------------------------------------------------------------
   The palette lives in ../assets/css/tokens.css, shared with
   every other TA job. This block only maps the names this
   trainer already used onto the shared ones — no colour is
   defined here, so the site re-themes from one file.
   ------------------------------------------------------------ */

:root {
  /* the trainer's accent was TU/e red; site-wide it is the calm indigo */
  --red: var(--calm);
  --red-soft: var(--calm-soft);
  --red-deep: var(--calm-bright);

  /* --ink, --warn, --shadow, --sans, --mono come straight from tokens.css */
  --ink-2: var(--ink-mid);
  --ink-3: var(--ink-soft);
  --line: var(--rule);
  --line-2: var(--surface-2);
  --bg: var(--ground);
  --panel: var(--surface);
  --panel-2: var(--surface-2);
  --accent: var(--calm-bright);
  --ok: var(--good);
  --ok-soft: var(--good-soft);

  --head-h: 60px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- App shell ---------- */

#app {
  display: grid;
  grid-template-columns: 296px 1fr;
  grid-template-rows: var(--head-h) 1fr;
  grid-template-areas: "head head" "side main";
  height: 100vh;
}

/* ---------- Header / timer bar ---------- */

header {
  grid-area: head;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  z-index: 30;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 9px;
  min-width: 0;
}
.brand b {
  font-size: 15px;
  letter-spacing: -.01em;
  white-space: nowrap;
}
.brand span {
  font-size: 12px;
  color: var(--ink-3);
  white-space: nowrap;
}

.spacer { flex: 1 1 auto; }

/* Timer cluster */
.timer {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 5px 12px 5px 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg);
}
.timer.running { border-color: var(--red); }
.timer.overtime { border-color: var(--warn); background: var(--warn-soft); }

.ring { width: 38px; height: 38px; display: block; flex: none; }
.ring circle { fill: none; stroke-width: 4; }
.ring .bg { stroke: var(--line); }
.ring .fg {
  stroke: var(--red);
  stroke-linecap: round;
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
  transition: stroke-dashoffset .35s linear;
}
.timer.overtime .ring .fg { stroke: var(--warn); }

.tnums { display: flex; flex-direction: column; line-height: 1.15; }
.tnums .big {
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.tnums .sub {
  font-size: 10.5px;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* Buttons */
.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  border-radius: 8px;
  padding: 7px 11px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: background .12s, border-color .12s, color .12s;
}
.btn:hover { background: var(--line-2); }
.btn:active { transform: translateY(.5px); }
.btn.primary {
  background: var(--red);
  border-color: var(--red);
  color: var(--on-calm);
  font-weight: 600;
}
.btn.primary:hover { background: var(--red-deep); border-color: var(--red-deep); }
.btn.icon { padding: 7px 9px; font-size: 14px; line-height: 1; }
/* the way back to the TA Desk hub; an <a>, so it needs the link reset */
.btn.home { text-decoration: none; display: inline-flex; align-items: center; color: var(--red); }
.btn.home:hover { background: var(--red-soft); border-color: var(--red); }
.btn.on { background: var(--red-soft); border-color: var(--red); color: var(--red-deep); }
.btn:disabled { opacity: .45; cursor: default; }

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg button {
  appearance: none; border: 0; background: var(--panel); color: var(--ink-2);
  font: inherit; font-size: 12px; padding: 6px 10px; cursor: pointer;
  border-right: 1px solid var(--line);
}
.seg button:last-child { border-right: 0; }
.seg button:hover { background: var(--line-2); }
.seg button[aria-pressed="true"] { background: var(--red); color: var(--on-calm); font-weight: 600; }

/* ---------- Sidebar ---------- */

aside {
  grid-area: side;
  background: var(--panel);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.side-head {
  position: sticky; top: 0; z-index: 5;
  background: var(--panel);
  padding: 12px 14px 10px;
  border-bottom: 1px solid var(--line-2);
}
.progress-line {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 11.5px; color: var(--ink-3); margin-bottom: 6px;
}
.bar { height: 5px; background: var(--line); border-radius: 999px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--red); border-radius: 999px; transition: width .3s; }

nav { padding: 6px 8px 40px; }

.unit-label {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 16px 8px 6px;
}

.navitem {
  display: grid;
  grid-template-columns: 18px 1fr auto;
  align-items: baseline;
  gap: 8px;
  width: 100%;
  text-align: left;
  border: 0;
  background: none;
  font: inherit;
  font-size: 13.5px;
  color: var(--ink-2);
  padding: 6px 8px;
  border-radius: 7px;
  cursor: pointer;
  line-height: 1.35;
}
.navitem:hover { background: var(--line-2); }
.navitem[aria-current="true"] {
  background: var(--red-soft);
  color: var(--red-deep);
  font-weight: 600;
}
html[data-theme="dark"] .navitem[aria-current="true"] { color: var(--red); }
.navitem .dot {
  width: 8px; height: 8px; border-radius: 50%;
  border: 1.5px solid var(--line);
  justify-self: center;
  align-self: center;
  flex: none;
}
.navitem.done .dot { background: var(--ok); border-color: var(--ok); }
.navitem[aria-current="true"] .dot { border-color: var(--red); }
.navitem .mins { font-size: 10.5px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.navitem .kind {
  font-size: 9px; font-weight: 700; letter-spacing: .05em;
  padding: 1px 4px; border-radius: 3px; text-transform: uppercase;
}
.kind.lab { background: #e3f0f8; color: #0b6ea8; }
.kind.quiz { background: #eae6f8; color: #5a3fa8; }
html[data-theme="dark"] .kind.lab { background: #14303f; color: #63b3e8; }
html[data-theme="dark"] .kind.quiz { background: #241f3a; color: #a996e6; }

/* ---------- The plan: your own times, where you should be, per-unit tracker ---------- */

[hidden] { display: none !important; }

/* the timer readout doubles as the button that opens the plan */
button.tnums {
  appearance: none; border: 0; background: none; color: inherit; font: inherit;
  text-align: left; padding: 2px 6px; margin: -2px -6px; border-radius: 6px; cursor: pointer;
}
button.tnums:hover { background: var(--line-2); }

/* sidebar: where the session clock says you should be */
.plan-now {
  margin-top: 10px; padding: 8px 10px; border-radius: 8px;
  background: var(--panel-2); font-size: 12px; line-height: 1.4;
}
.pn-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 24px; }
.pn-state { font-weight: 700; color: var(--ink-2); }
.plan-now.ok .pn-state { color: var(--ok); }
.plan-now.behind .pn-state { color: var(--warn); }
.plan-now.ahead .pn-state { color: var(--accent); }
.pn-where { color: var(--ink-3); margin-top: 2px; }
.pn-where b { color: var(--ink); font-weight: 600; }
.pn-clock { color: var(--ink-3); font-size: 11px; margin-top: 4px; font-variant-numeric: tabular-nums; }
.plan-now .btn { padding: 3px 8px; font-size: 11.5px; }

/* each unit: ticks, time spent against its budget, and a bar */
.unit-label {
  display: grid; grid-template-columns: 1fr auto; align-items: baseline;
  column-gap: 8px; row-gap: 5px;
}
.unit-label .um {
  font-size: 10.5px; font-weight: 500; letter-spacing: 0; text-transform: none;
  font-variant-numeric: tabular-nums; white-space: nowrap;
}
.unit-label .ubar { grid-column: 1 / -1; height: 3px; background: var(--line); border-radius: 999px; overflow: hidden; }
.unit-label .ubar i { display: block; height: 100%; width: 0; background: var(--ok); transition: width .3s; }
.unit-label.complete .un { color: var(--ok); }
.unit-label.sched .un::before { content: "▸ "; color: var(--warn); }

.navitem.sched { box-shadow: inset 3px 0 0 var(--warn); }
.navitem .mins { white-space: nowrap; }
.navitem .mins.custom { color: var(--accent); font-weight: 600; }
.navitem .mins.over { color: var(--warn); }

/* on the card: on track / behind / ahead */
.plan-pill {
  margin-left: auto; font-size: 11px; font-weight: 600; white-space: nowrap;
  padding: 2px 8px; border-radius: 999px; background: var(--line-2); color: var(--ink-2);
}
.plan-pill.ok { background: var(--ok-soft); color: var(--ok); }
.plan-pill.behind { background: var(--warn-soft); color: var(--warn); }
.plan-pill.ahead { background: var(--red-soft); color: var(--red-deep); }

/* the panel for your own times */
.plan-pop {
  position: fixed; top: calc(var(--head-h) + 8px); right: 16px; z-index: 40;
  width: min(340px, calc(100vw - 32px));
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: var(--shadow-lg); padding: 10px 14px 12px; font-size: 13px;
}
.pp-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 2px; }
.pp-head b { font-size: 14px; }
.pp-sec { padding: 10px 0; border-top: 1px solid var(--line-2); }
.pp-sec:last-child { padding-bottom: 0; }
.pp-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.pp-lbl { display: flex; flex-direction: column; min-width: 0; font-weight: 600; }
.pp-lbl small {
  font-weight: 400; font-size: 11.5px; color: var(--ink-3);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.pp-in { display: flex; align-items: center; gap: 6px; flex: none; color: var(--ink-3); font-size: 12px; }
.pp-in input {
  width: 76px; font: inherit; font-family: var(--mono); font-size: 14px; text-align: right;
  padding: 5px 7px; border: 1px solid var(--line); border-radius: 7px;
  background: var(--bg); color: var(--ink);
}
.pp-in input:focus { outline: 2px solid var(--red); outline-offset: -1px; border-color: var(--red); }
.pp-note { font-size: 11.5px; color: var(--ink-3); margin: 6px 0 0; }
.pp-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }

/* ---------- Main ---------- */

main {
  grid-area: main;
  overflow-y: auto;
  overscroll-behavior: contain;
  scroll-behavior: smooth;
}

.wrap { max-width: 860px; margin: 0 auto; padding: 30px 28px 120px; }

.eyebrow {
  display: flex; align-items: center; gap: 10px;
  font-size: 11.5px; color: var(--ink-3); margin-bottom: 6px;
}
.eyebrow .ref {
  font-family: var(--mono); font-size: 11px;
  background: var(--line-2); padding: 2px 7px; border-radius: 4px; color: var(--ink-2);
}

h1.card-title {
  font-size: 27px;
  line-height: 1.22;
  letter-spacing: -.02em;
  margin: 0 0 20px;
  color: var(--ink);
}

.card-body > *:first-child { margin-top: 0; }
.card-body p { margin: 0 0 14px; }
.card-body ul, .card-body ol { margin: 0 0 14px; padding-left: 22px; }
.card-body li { margin-bottom: 6px; }
.card-body h3 {
  font-size: 15px; margin: 26px 0 10px; letter-spacing: -.01em;
}

/* Boxes that echo the lecture slides */
.box {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 0 0 18px;
  background: var(--panel);
  box-shadow: var(--shadow-sm);
}
.box > .box-h {
  background: var(--red);
  color: var(--on-calm);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .01em;
  padding: 7px 14px;
}
.box > .box-c { padding: 14px 16px 4px; background: var(--red-soft); }
.box > .box-c > *:last-child { margin-bottom: 14px; }
html[data-theme="dark"] .box > .box-h { background: var(--red-soft); color: var(--red); border-bottom: 1px solid var(--line); }

.box.plain > .box-h { background: var(--ink-2); }
.box.plain > .box-c { background: var(--line-2); }
html[data-theme="dark"] .box.plain > .box-h { background: var(--line); color: var(--ink); }

.note {
  border-left: 3px solid var(--accent);
  background: var(--line-2);
  padding: 11px 14px;
  border-radius: 0 8px 8px 0;
  margin: 0 0 16px;
  font-size: 14.5px;
}
.note b { color: var(--accent); }
.note.warn { border-left-color: var(--warn); background: var(--warn-soft); }
.note.warn b { color: var(--warn); }
.note.ok { border-left-color: var(--ok); background: var(--ok-soft); }
.note.ok b { color: var(--ok); }

.mathblock { overflow-x: auto; padding: 4px 0; }

table.tbl {
  width: 100%; border-collapse: collapse; font-size: 14px; margin: 0 0 16px;
  display: block; overflow-x: auto; white-space: nowrap;
}
table.tbl th, table.tbl td {
  border-bottom: 1px solid var(--line); padding: 7px 10px; text-align: center;
}
table.tbl th { font-size: 12px; color: var(--ink-3); font-weight: 600; }
table.tbl tr td:first-child, table.tbl tr th:first-child { text-align: left; font-weight: 600; }

/* Reveal / self-test */
.reveal { margin: 0 0 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.reveal > summary {
  cursor: pointer; padding: 10px 14px; font-size: 13.5px; font-weight: 600;
  list-style: none; display: flex; align-items: center; gap: 8px; color: var(--accent);
}
.reveal > summary::-webkit-details-marker { display: none; }
.reveal > summary::before { content: "▸"; font-size: 11px; transition: transform .15s; }
.reveal[open] > summary::before { transform: rotate(90deg); }
.reveal > div { padding: 2px 16px 8px; border-top: 1px solid var(--line-2); }
.reveal > div > *:first-child { margin-top: 12px; }

/* Footer nav */
.footnav {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  margin-top: 38px; padding-top: 18px; border-top: 1px solid var(--line);
}
.footnav .side { display: flex; gap: 8px; align-items: center; }
.kbd {
  font-family: var(--mono); font-size: 10.5px; border: 1px solid var(--line);
  border-bottom-width: 2px; border-radius: 4px; padding: 1px 5px; color: var(--ink-3);
  background: var(--panel);
}
.hint { font-size: 11.5px; color: var(--ink-3); }

/* ---------- Labs ---------- */

.lab {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); padding: 14px; margin: 0 0 18px; box-shadow: var(--shadow-sm);
}
.lab canvas { width: 100%; height: auto; display: block; border-radius: 8px; touch-action: none; cursor: crosshair; }
.lab-controls { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 12px; }
.lab-controls label { font-size: 12.5px; color: var(--ink-2); display: inline-flex; align-items: center; gap: 5px; }
.chip {
  font-size: 12px; border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px;
  cursor: pointer; background: var(--panel); color: var(--ink-2); user-select: none;
}
.chip[aria-pressed="true"] { background: var(--red); border-color: var(--red); color: var(--on-calm); }
.readout {
  margin-top: 12px; font-family: var(--mono); font-size: 12.5px; line-height: 1.85;
  background: var(--line-2); border-radius: 8px; padding: 10px 12px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 2px 18px;
}
.readout .k { color: var(--ink-3); }
input[type="range"] { accent-color: var(--red); }

/* ---------- Quiz ---------- */

.q { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); padding: 14px 16px; margin: 0 0 14px; }
.q .qtext { font-size: 15px; margin-bottom: 12px; }
.opts { display: flex; flex-direction: column; gap: 7px; }
.opt {
  text-align: left; border: 1px solid var(--line); background: var(--panel); color: var(--ink);
  border-radius: 8px; padding: 9px 12px; font: inherit; font-size: 14px; cursor: pointer;
  display: flex; gap: 9px; align-items: baseline; transition: background .12s, border-color .12s;
}
.opt:hover:not(:disabled) { background: var(--line-2); }
.opt .mark { font-size: 11px; width: 15px; flex: none; color: var(--ink-3); font-family: var(--mono); }
.opt.correct { background: var(--ok-soft); border-color: var(--ok); }
.opt.correct .mark { color: var(--ok); }
.opt.wrong { background: var(--red-soft); border-color: var(--red); }
.opt.wrong .mark { color: var(--red); }
.opt:disabled { cursor: default; }
.explain { margin-top: 11px; font-size: 13.5px; color: var(--ink-2); border-left: 3px solid var(--ok); padding-left: 11px; }

.scoreline { font-size: 13px; color: var(--ink-3); margin-bottom: 16px; }

/* ---------- Exercises view ---------- */

.ex-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 6px; }
.ex-group { margin: 0 0 26px; }
.ex-group > h2 {
  font-size: 17px; margin: 0 0 4px; letter-spacing: -.01em;
  display: flex; align-items: center; gap: 10px;
}
.tag {
  font-size: 10px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase;
  padding: 2px 7px; border-radius: 999px;
}
.tag.assigned { background: var(--red); color: var(--on-calm); }
.tag.extra { background: var(--line); color: var(--ink-3); }
.ex-group > p.src { font-size: 12.5px; color: var(--ink-3); margin: 0 0 14px; }

.ex {
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel);
  margin-bottom: 10px; box-shadow: var(--shadow-sm);
}
.ex.skip { opacity: .58; }
.ex-top { display: flex; gap: 11px; padding: 11px 14px; align-items: flex-start; }
.ex-top input[type="checkbox"] { margin-top: 4px; width: 16px; height: 16px; accent-color: var(--ok); flex: none; cursor: pointer; }
.ex-num { font-family: var(--mono); font-size: 12.5px; font-weight: 600; color: var(--red); flex: none; padding-top: 1px; }
.ex-body { flex: 1; min-width: 0; }
.ex-stem { font-size: 14.5px; }
.ex-parts { list-style: none; padding: 0; margin: 8px 0 0; }
.ex-parts > li { display: flex; gap: 9px; padding: 3px 0; font-size: 14.5px; align-items: baseline; }
.ex-parts > li > .lbl { font-weight: 600; color: var(--ink-3); width: 15px; flex: none; }
.ex-parts > li > .ans {
  margin-left: auto; font-size: 13px; color: var(--ok); text-align: right;
  padding-left: 14px; max-width: 58%;
}
.ex-sol { padding: 0 14px 12px 54px; }
.ex-sol .reveal { margin-bottom: 0; }
.ex-done .ex-stem { text-decoration: line-through; text-decoration-color: var(--ink-3); opacity: .6; }

/* ---------- KaTeX fallbacks ---------- */
.katex { font-size: 1.045em; }
.katex-display { margin: .9em 0; overflow-x: auto; overflow-y: hidden; padding: 2px 0; }
.tex-raw { font-family: var(--mono); font-size: 13px; color: var(--ink-2); }

/* ---------- Toast ---------- */
#toast {
  position: fixed; left: 50%; bottom: 26px; transform: translate(-50%, 20px);
  background: var(--ink); color: var(--bg); font-size: 13px; padding: 9px 16px;
  border-radius: 999px; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s;
  z-index: 100; box-shadow: var(--shadow);
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Week wheel (wheel.js) ---------- */

/* the trigger, at the top of the sidebar */
.week-btn {
  display: flex; align-items: center; gap: 10px; width: 100%;
  margin-bottom: 12px; padding: 7px 10px 7px 7px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel-2); color: var(--ink);
  font: inherit; text-align: left; cursor: pointer;
  transition: border-color .15s, background .15s, box-shadow .15s;
}
.week-btn:hover { border-color: var(--red); background: var(--red-soft); box-shadow: 0 0 0 3px var(--calm-glow); }
.week-btn .wk-n {
  flex: none; width: 38px; height: 38px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--red); color: var(--on-calm);
  font-family: var(--mono); font-weight: 600; font-size: 17px;
  transition: transform .35s cubic-bezier(.3, 1.6, .5, 1);
}
.week-btn:hover .wk-n { transform: rotate(-14deg) scale(1.1); }
.week-btn .wk-t { flex: 1; min-width: 0; display: flex; flex-direction: column; line-height: 1.25; }
.week-btn .wk-t b { font-size: 13.5px; }
.week-btn .wk-t small {
  font-size: 11.5px; color: var(--ink-3);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* the overlay: wheel in the middle column, summary in the right one */
.wheel-overlay {
  position: fixed; inset: 0; z-index: 90;
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 32px;
  padding: 24px;
  background:
    radial-gradient(circle at 50% 50%, transparent 0 28%, color-mix(in srgb, var(--ink) 24%, transparent) 100%),
    color-mix(in srgb, var(--bg) 72%, transparent);
  -webkit-backdrop-filter: blur(8px) saturate(1.15);
  backdrop-filter: blur(8px) saturate(1.15);
  opacity: 0; transition: opacity .25s ease;
  outline: none;
}
.wheel-overlay[hidden] { display: none; }
.wheel-overlay.open { opacity: 1; }

.wheel-stage {
  grid-column: 2;
  width: min(560px, 84vh, 92vw); aspect-ratio: 1;
  transform: scale(.3) rotate(-45deg); opacity: 0;
  transition: transform .65s cubic-bezier(.16, 1.25, .3, 1), opacity .3s ease;
}
.wheel-overlay.open .wheel-stage { transform: none; opacity: 1; }
.wheel-overlay.launch .wheel-stage {
  transform: scale(1.7); opacity: 0;
  transition: transform .42s cubic-bezier(.55, 0, .85, .35), opacity .38s ease;
}
.wheel { display: block; width: 100%; height: 100%; overflow: visible; font-family: var(--sans); }

.wheel .ring-outer { fill: none; stroke: var(--line); stroke-width: 1.5; stroke-dasharray: 2 7; }
.wheel .ring-spin { fill: none; stroke: var(--red); stroke-opacity: .55; stroke-width: 2; stroke-dasharray: 16 11; }

/* rotated from wheel.js with an SVG transform attribute */
.wheel-cursor { fill: var(--red); filter: drop-shadow(0 0 7px color-mix(in srgb, var(--red) 65%, transparent)); }

.slot {
  cursor: pointer;
  transform-box: fill-box; transform-origin: center;
  transition: transform .32s cubic-bezier(.3, 1.55, .5, 1);
}
.slot-in { transform-box: fill-box; transform-origin: center; }
.wheel-overlay.open .slot-in {
  animation: slotIn .5s cubic-bezier(.2, 1.3, .4, 1) both;
  animation-delay: calc(var(--i) * 45ms + 150ms);
}
@keyframes slotIn { from { opacity: 0; transform: scale(.35) rotate(-20deg); } }

.slot-shape {
  fill: color-mix(in srgb, var(--panel) 90%, transparent);
  stroke: var(--line); stroke-width: 1.5;
  transform-box: fill-box; transform-origin: center;
  transition: fill .2s, stroke .2s, filter .25s;
}
.slot text { pointer-events: none; text-anchor: middle; fill: var(--ink); transition: fill .2s; }
.slot .slot-kicker { font-size: 12px; letter-spacing: .22em; fill: var(--ink-3); }
.slot .slot-num { font-family: var(--mono); font-size: 46px; font-weight: 600; }
.slot .slot-sub { font-size: 11px; letter-spacing: .1em; text-transform: uppercase; fill: var(--red); }

.slot.current .slot-shape { stroke: var(--red); stroke-width: 2.5; }
.slot.locked .slot-shape { fill: color-mix(in srgb, var(--panel-2) 80%, transparent); stroke-dasharray: 5 5; }
.slot.locked text { fill: var(--ink-3); }

.slot.active { transform: translate(var(--dx), var(--dy)) scale(1.06); }
.slot.active .slot-shape {
  fill: var(--red); stroke: var(--red-deep);
  filter: drop-shadow(0 8px 20px color-mix(in srgb, var(--red) 50%, transparent));
}
.slot.active text, .slot.active .slot-kicker, .slot.active .slot-sub { fill: var(--on-calm); }
.slot.locked.active .slot-shape {
  fill: color-mix(in srgb, var(--ink-3) 32%, var(--panel)); stroke: var(--ink-3); filter: none;
}
.slot.locked.active text, .slot.locked.active .slot-kicker, .slot.locked.active .slot-sub { fill: var(--ink); }
.slot.shake .slot-shape { animation: slotShake .36s ease; }
@keyframes slotShake { 20%, 60% { transform: translateX(-7px); } 40%, 80% { transform: translateX(7px); } }

.wheel-hub circle { fill: var(--panel); stroke: var(--line); stroke-width: 1.5; cursor: pointer; }
.wheel-hub:hover circle { stroke: var(--red); }
.wheel-hub text { pointer-events: none; text-anchor: middle; fill: var(--ink); }
.wheel-hub .hub-kicker { font-size: 11px; letter-spacing: .24em; fill: var(--ink-3); }
.wheel-hub .hub-num { font-family: var(--mono); font-size: 54px; font-weight: 600; transform-box: fill-box; transform-origin: center; }
.wheel-hub .hub-num.pop { animation: hubPop .35s cubic-bezier(.3, 1.6, .5, 1); }
.wheel-hub .hub-label { font-size: 11px; fill: var(--ink-3); }
@keyframes hubPop { from { transform: scale(1.45); opacity: .3; } }

/* the summary panel, faded in on hover */
.wheel-panel {
  grid-column: 3; justify-self: start; width: min(350px, 100%);
  padding: 18px 20px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel) 90%, transparent);
  box-shadow: var(--shadow-lg);
  transform: translateX(28px); opacity: 0;
  transition: transform .55s cubic-bezier(.16, 1, .3, 1) .15s, opacity .35s ease .15s;
}
.wheel-overlay.open .wheel-panel { transform: none; opacity: 1; }
.wheel-overlay.launch .wheel-panel { transform: translateX(28px); opacity: 0; transition-delay: 0s; }

.wp-eyebrow {
  display: flex; align-items: center; gap: 8px; margin-bottom: 8px;
  font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3);
}
.wp-state { padding: 1px 8px; border-radius: 999px; font-size: 10px; letter-spacing: .06em; background: var(--line); color: var(--ink-3); }
.wp-state.current { background: var(--red); color: var(--on-calm); }
.wp-state.open { background: var(--ok-soft); color: var(--ok); }
.wp-title { font-size: 21px; line-height: 1.22; letter-spacing: -.01em; margin: 0 0 10px; min-height: 2.44em; }
.wp-summary { font-size: 14px; line-height: 1.55; color: var(--ink-2); margin: 0 0 12px; min-height: 7.75em; }
.wp-list { margin: 0 0 12px; padding-left: 18px; font-size: 13px; color: var(--ink-2); min-height: 4.5em; }
.wp-list li { margin-bottom: 4px; }
.wp-stats { min-height: 94px; }

/* each block rises into place, slightly staggered, whenever the pointed-at week changes */
.wp-body.fade > * { animation: wpFade .42s cubic-bezier(.2, .8, .3, 1) both; }
.wp-body.fade > :nth-child(2) { animation-delay: .05s; }
.wp-body.fade > :nth-child(3) { animation-delay: .1s; }
.wp-body.fade > :nth-child(4) { animation-delay: .15s; }
@keyframes wpFade { from { opacity: 0; transform: translateY(8px); } }
.wp-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; margin-bottom: 10px; }
.wp-grid div { display: flex; flex-direction: column; padding: 6px 9px; border-radius: 8px; background: var(--panel-2); }
.wp-grid b { font-family: var(--mono); font-size: 15px; font-weight: 600; }
.wp-grid span { font-size: 10.5px; color: var(--ink-3); }
.wp-hint { margin: 12px 0 0; font-size: 11px; color: var(--ink-3); }

@media (max-width: 1040px) {
  .wheel-overlay { grid-template-columns: 1fr; justify-items: center; align-content: safe center; gap: 14px; overflow-y: auto; }
  .wheel-stage { grid-column: 1; width: min(440px, calc(100vw - 64px), 48vh); }
  .wheel-panel { grid-column: 1; justify-self: center; }
  .wp-title, .wp-summary, .wp-list, .wp-stats { min-height: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .wheel-overlay, .wheel-overlay * { transition: none !important; animation: none !important; }
}

/* ---------- Responsive ---------- */
#menuBtn { display: none; }

@media (max-width: 940px) {
  #app { grid-template-columns: 1fr; grid-template-areas: "head" "main"; }
  aside {
    position: fixed; top: var(--head-h); bottom: 0; left: 0; width: 290px; z-index: 25;
    transform: translateX(-100%); transition: transform .22s ease; box-shadow: var(--shadow);
  }
  body.nav-open aside { transform: none; }
  #menuBtn { display: inline-flex; }
  .wrap { padding: 22px 18px 110px; }
  h1.card-title { font-size: 23px; }
  .brand span { display: none; }
}

@media (max-width: 620px) {
  .tnums .sub { display: none; }
  .brand b { font-size: 13px; }
  .hide-sm { display: none !important; }
}

@media print {
  aside, header, .footnav { display: none; }
  #app { display: block; height: auto; }
  main { overflow: visible; }
}