:root {
  --paper: #FFFFFF;
  --sheet: #FAF8F5;
  --ink: #0A0A0A;
  --ink-soft: #5F5B55;
  --rule: #ECE8E2;
  --rule-strong: #DCD6CD;
  --tang: #0A0A0A;
  --tang-ink: #82633A;
  --tang-wash: #F5EFE6;
  --on-tang: #FFFFFF;
  --good: #1f6b3a;
  --good-wash: #e3f1e6;
  --good-mark: #8fcb9f;
  --warn: #7a4f00;
  --warn-wash: #f8ecd0;
  --warn-mark: #e8c36a;
  --bad: #a3261a;
  --bad-wash: #f8e2de;
  --bad-mark: #e39a8e;
  --code: #F4F1EC;
  --round: 12px;
  --stack: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    --check-b: #EEEAE4;
  }

:root[data-theme="dark"] {
    --paper: #000000;
    --sheet: #0F0E0D;
    --ink: #FFFFFF;
    --ink-soft: #A8A39C;
    --rule: #24221F;
    --rule-strong: #35322E;
    --tang: #FFFFFF;
    --tang-ink: #C9AE8A;
    --tang-wash: #1C1813;
    --good: #7fd29b;
    --good-wash: #1b2e21;
    --good-mark: #3f7a52;
    --warn: #f2c46b;
    --warn-wash: #352a12;
    --warn-mark: #8a6a26;
    --bad: #ff9a8c;
    --bad-wash: #3a1d19;
    --bad-mark: #8e3a30;
    --code: #171614;
    --on-tang: #000000;
    --check-a: #1A1917;
    --check-b: #111010;
  }

*, *::before, *::after { box-sizing: border-box; }

[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.55 var(--stack);
}

h1, h2, h3, p, ul, ol, dl, dd, fieldset, legend { margin: 0; padding: 0; }

fieldset { border: 0; min-width: 0; }

button, input, select, textarea { font: inherit; color: inherit; }

a { color: var(--tang-ink); }

code, pre { font-family: var(--mono); }

:focus-visible {
  outline: 3px solid var(--tang-ink);
  outline-offset: 2px;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand svg { width: 28px; height: 28px; flex: none; }

.pledge {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 14px;
}

.pledge svg { width: 16px; height: 16px; flex: none; color: var(--tang-ink); }

.intro { padding: 56px 0 32px; max-width: 760px; }

.intro h1 {
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.intro h1 em { font-style: normal; color: var(--tang-ink); }

.intro p {
  margin-top: 16px;
  color: var(--ink-soft);
  font-size: 18px;
}

.tabs {
  display: grid;
  grid-template-columns: repeat(11, minmax(0, 1fr));
  gap: 5px;
  margin-bottom: 24px;
  padding: 5px;
  border: 1px solid var(--rule);
  border-radius: 12px;
  background: var(--sheet);
}

.tab {
  min-width: 0;
  min-height: 46px;
  padding: 8px 4px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  font-size: 15px;
  font-weight: 650;
  line-height: 1.25;
  cursor: pointer;
}

.tab:hover { background: var(--tang-wash); }

.tab[aria-selected="true"] {
  background: var(--ink);
  color: var(--paper);
}

.pane:focus { outline: none; }

.bench {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px 28px;
  align-items: start;
}

.calcs {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px 28px;
  align-items: start;
}

.stack { display: grid; gap: 24px; min-width: 0; }

.card {
  padding: 22px;
  border: 1px solid var(--rule);
  border-radius: var(--round);
  background: var(--sheet);
}

.form { display: grid; gap: 20px; align-content: start; }

.out { display: grid; gap: 14px; min-width: 0; align-content: start; }

.below { margin-top: 24px; }

.legend, .field > label, .field > .label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.legend small, .field > label small {
  margin-left: 6px;
  color: var(--ink-soft);
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
}

.field { display: grid; min-width: 0; align-content: start; }

.pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 14px; }

.trio { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px 14px; }

.joined { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 8.5em); gap: 8px; }

.hint { margin-top: 6px; color: var(--ink-soft); font-size: 13px; }

.text, select.text {
  width: 100%;
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid var(--rule-strong);
  border-radius: 8px;
  background: var(--paper);
}

.text::placeholder { color: var(--ink-soft); opacity: 0.7; }

input.text { font-variant-numeric: tabular-nums; }

input[type="date"].text, input[type="time"].text { min-width: 0; padding-right: 8px; }

[aria-invalid="true"] { border-color: var(--bad); box-shadow: 0 0 0 1px var(--bad); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.15s, transform 0.05s;
}

.btn:hover { background: var(--tang-wash); }
.btn:active { transform: translateY(1px); }
.btn svg { width: 18px; height: 18px; flex: none; }

.btn-main {
  border-color: var(--tang);
  background: var(--tang);
  color: var(--on-tang);
}

.btn-main:hover { background: var(--tang); filter: brightness(1.07); }

.btn-small { min-height: 38px; padding: 0 13px; font-size: 15px; }

.btn-quiet { border-color: var(--rule-strong); }

.btn-icon { width: 44px; min-height: 42px; padding: 0; }

.row-btns { display: flex; flex-wrap: wrap; gap: 8px; }

.choices { display: flex; flex-wrap: wrap; gap: 6px; }

.choice { position: relative; display: block; cursor: pointer; }

.choice input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.choice span {
  display: block;
  min-height: 40px;
  padding: 8px 13px;
  border: 1px solid var(--rule-strong);
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  line-height: 22px;
}

.choice input:checked + span {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
}

.choice input:focus-visible + span {
  outline: 3px solid var(--tang-ink);
  outline-offset: 2px;
}

.tick {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
}

.tick input { width: 20px; height: 20px; margin: 2px 0 0; flex: none; accent-color: var(--tang); }

.tick small { display: block; color: var(--ink-soft); font-size: 13px; }

.mini { color: var(--ink-soft); font-size: 14px; font-variant-numeric: tabular-nums; }

.calc-title { font-size: 17px; letter-spacing: -0.01em; }

.sentence {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  font-size: 17px;
}

.sentence .text { width: 8em; }

.sentence select.text { width: auto; }

.answer {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  border-radius: 8px;
  background: var(--paper);
}

.answer-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 12px;
}

.big {
  min-width: 0;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.formula {
  color: var(--ink-soft);
  font: 13.5px/1.55 var(--mono);
  overflow-wrap: anywhere;
  white-space: pre-line;
}

.out-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 10px;
}

.out-head h2 { font-size: 17px; }

.stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.stat {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-end;
  min-width: 0;
  padding: 12px 14px;
  border-radius: 8px;
  background: var(--paper);
}

.stat dt { color: var(--ink-soft); font-size: 13px; font-weight: 600; }

.stat dd {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.stat dd.words { font-size: 18px; letter-spacing: -0.01em; }

.stat.is-wide { grid-column: 1 / -1; }

.stat.is-lead dd { font-size: 30px; }

.stat.is-lead dd.words { font-size: 22px; }

.sub {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.list { display: grid; gap: 6px; list-style: none; font-size: 14px; }

.list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 2px 12px;
  padding: 7px 10px;
  border-radius: 7px;
  background: var(--paper);
}

.list .num { font-weight: 650; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.badge.is-good { background: var(--good-wash); color: var(--good); }
.badge.is-warn { background: var(--warn-wash); color: var(--warn); }
.badge.is-bad { background: var(--bad-wash); color: var(--bad); }

.note {
  display: flex;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 14px;
}

.note svg { width: 16px; height: 16px; margin-top: 3px; flex: none; }

.note.is-error { color: var(--bad); }

.callout {
  padding: 12px 14px;
  border-left: 3px solid var(--tang);
  border-radius: 0 8px 8px 0;
  background: var(--tang-wash);
  font-size: 14px;
}

.table-wrap {
  max-height: 560px;
  overflow: auto;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--paper);
}

table.grid {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.grid th, .grid td {
  padding: 7px 12px;
  border-bottom: 1px solid var(--rule);
  text-align: right;
  white-space: nowrap;
}

.grid th:first-child, .grid td:first-child { text-align: left; }

.grid thead th {
  position: sticky;
  top: 0;
  background: var(--code);
  color: var(--ink-soft);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.grid tbody tr:last-child td { border-bottom: 0; }

.scale { position: relative; margin: 10px 0 2px; }

.scale-bar { display: flex; height: 12px; border-radius: 6px; overflow: hidden; }

.scale-bar i { display: block; height: 100%; }

.scale-bar .s-under { flex: 14; background: var(--warn-mark); }
.scale-bar .s-normal { flex: 26; background: var(--good-mark); }
.scale-bar .s-over { flex: 20; background: var(--warn-mark); }
.scale-bar .s-ob1 { flex: 20; background: var(--bad-mark); }
.scale-bar .s-ob2 { flex: 20; background: var(--bad); opacity: 0.75; }

.scale-pin {
  position: absolute;
  top: -5px;
  width: 4px;
  height: 22px;
  border-radius: 2px;
  background: var(--ink);
  box-shadow: 0 0 0 2px var(--sheet);
  transform: translateX(-50%);
}

.scale-ticks {
  position: relative;
  height: 18px;
  margin-top: 4px;
  color: var(--ink-soft);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.scale-ticks span { position: absolute; transform: translateX(-50%); }

.rows { display: grid; gap: 8px; }

.course {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 6.5em) minmax(0, 6em) 44px;
  grid-template-areas: "name grade credits remove";
  gap: 8px;
  align-items: center;
}

.is-weighted .course {
  grid-template-columns: minmax(0, 1fr) minmax(0, 6.5em) minmax(0, 6em) minmax(0, 11em) 44px;
  grid-template-areas: "name grade credits level remove";
}

.course .c-name { grid-area: name; }
.course .c-grade { grid-area: grade; }
.course .c-credits { grid-area: credits; }
.course .c-level { grid-area: level; }
.course .btn-icon { grid-area: remove; }

.course-head {
  color: var(--ink-soft);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.course .c-level { display: none; }
.is-weighted .course .c-level { display: block; }

.trow {
  display: grid;
  grid-template-columns: minmax(0, 5.5em) minmax(0, 1fr) auto minmax(0, 1fr) auto 44px;
  gap: 8px;
  align-items: center;
}

.trow span { color: var(--ink-soft); font-size: 14px; }

.prose {
  margin-top: 88px;
  padding: 56px 0 24px;
  border-top: 1px solid var(--rule);
}

.prose > * { max-width: 720px; }

.prose h2 {
  margin: 48px 0 12px;
  font-size: 26px;
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.prose h2:first-child { margin-top: 0; }

.prose h3 { margin: 24px 0 4px; font-size: 17px; }

.prose p + p, .prose p + ul, .prose ul + p { margin-top: 12px; }

.prose ul { padding-left: 20px; }

.prose li { margin-top: 8px; }

.prose p, .prose li { color: var(--ink-soft); }

.prose strong { color: var(--ink); }

.prose code {
  padding: 1px 5px;
  border-radius: 5px;
  background: var(--code);
  color: var(--ink);
  font-size: 0.92em;
  overflow-wrap: anywhere;
}

.colophon {
  margin-top: 40px;
  padding: 24px 0 48px;
  border-top: 1px solid var(--rule);
  color: var(--ink-soft);
  font-size: 14px;
}

.colophon a { color: inherit; }

.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

@media (max-width: 900px) {
  .bench, .calcs { grid-template-columns: minmax(0, 1fr); }
  .tabs { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .wrap { padding: 0 16px; }
  .masthead { flex-direction: column; align-items: flex-start; gap: 6px; padding: 16px 0; }
  .intro { padding: 36px 0 24px; }
  .intro p { font-size: 17px; }
  .tabs { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 4px; padding: 4px; }
  .tab { padding: 6px 2px; font-size: 14px; }
  .card { padding: 18px 16px; }
  .pair, .trio { grid-template-columns: minmax(0, 1fr); }
  .pair.keep, .trio.keep { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sentence { font-size: 16px; }
  .sentence .text { width: 7em; }
  .big { font-size: 24px; }
  .stat dd { font-size: 21px; }
  .stat.is-lead dd { font-size: 25px; }
  .grid th, .grid td { padding: 6px 8px; font-size: 13px; }
  .course-head { display: none; }
  .course, .is-weighted .course {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 44px;
    grid-template-areas: "name name remove" "grade credits credits";
    padding-bottom: 10px;
    border-bottom: 1px solid var(--rule);
  }
  .is-weighted .course { grid-template-areas: "name name remove" "grade credits credits" "level level level"; }
  .trow { grid-template-columns: minmax(0, 4.2em) minmax(0, 1fr) auto minmax(0, 1fr) auto 44px; gap: 6px; }
  .prose { margin-top: 56px; padding-top: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}