/* studyflex design system.
   Type: Source Serif 4 (display + prose), KaTeX faces (math),
   ui-monospace (data and labels). Warm paper, one green accent,
   grade colors are the only other hues. */

:root {
  --paper: #F7F5EF;
  --card: #FFFFFF;
  --card-2: #EFEDE5;
  --ink: #22262D;
  --ink-2: #575C63;
  --muted: #6B6F75;   /* 4.7:1 on paper, so small labels pass AA */
  --hairline: #E2DFD5;
  --accent: #2F7D46;
  --accent-soft: #E7F1E9;
  --link: #1E5CA8;
  --again: #B8402F;
  --again-bg: #FAECE9;
  --hard: #8A5E0E;
  --hard-bg: #F9F1DE;
  --good: #2F7D46;
  --good-bg: #E7F1E9;
  --easy: #2A6FBF;
  --easy-bg: #E8F0FA;
  --serif: "Source Serif 4", "Iowan Old Style", Georgia, serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #15181D;
    --card: #1C2027;
    --card-2: #22262E;
    --ink: #E8E6E0;
    --ink-2: #B2B6BD;
    --muted: #83878E;
    --hairline: #2B3039;
    --accent: #4CAF6E;
    --accent-soft: #1E2E23;
    --link: #6DA7EC;
    --again: #E06A5E;
    --again-bg: #33211E;
    --hard: #D9A93F;
    --hard-bg: #2F2818;
    --good: #4CAF6E;
    --good-bg: #1E2E23;
    --easy: #5E9BE0;
    --easy-bg: #1C2634;
  }
}
:root[data-theme="dark"] {
  --paper: #15181D;
  --card: #1C2027;
  --card-2: #22262E;
  --ink: #E8E6E0;
  --ink-2: #B2B6BD;
  --muted: #83878E;
  --hairline: #2B3039;
  --accent: #4CAF6E;
  --accent-soft: #1E2E23;
  --link: #6DA7EC;
  --again: #E06A5E;
  --again-bg: #33211E;
  --hard: #D9A93F;
  --hard-bg: #2F2818;
  --good: #4CAF6E;
  --good-bg: #1E2E23;
  --easy: #5E9BE0;
  --easy-bg: #1C2634;
}

* { box-sizing: border-box; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }

.mono { font-family: var(--mono); }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
  position: absolute; left: 1rem; top: -3rem;
  background: var(--ink); color: var(--paper);
  font-family: var(--mono); font-size: 0.85rem;
  padding: 0.5em 1em; border-radius: 0 0 8px 8px;
  z-index: 100;
}
.skip:focus { top: 0; }

/* easier reading: a plain sans face, more air between letters and
   lines. The same knobs that help dyslexic readers help tired ones. */
body.cozy {
  --serif: system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0.02em;
  word-spacing: 0.08em;
  line-height: 1.8;
}
body.cozy .prompt { font-size: 1.15rem; }
body.cozy .katex { font-size: 1.15em; }

label.check {
  display: flex; align-items: center; gap: 0.5em;
  font-family: var(--serif); font-size: 0.95rem;
  text-transform: none; letter-spacing: 0; color: var(--ink);
  margin: 0;
}
label.check input { width: 1.1em; height: 1.1em; accent-color: var(--accent); }

/* ---------- header ---------- */

header.top {
  display: flex;
  align-items: baseline;
  gap: 1.4rem;
  flex-wrap: wrap;
  max-width: 1020px;
  margin: 0 auto;
  padding: 1.1rem 1.25rem 0.9rem;
  border-bottom: 1px solid var(--hairline);
}
.wordmark {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.wordmark .fl { color: var(--accent); }
nav.tabs { display: flex; gap: 1rem; flex-wrap: wrap; }
nav.tabs a {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--ink-2);
  text-decoration: none;
  padding: 0.15em 0;
  border-bottom: 2px solid transparent;
}
nav.tabs a:hover { color: var(--ink); }
nav.tabs a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }
.top-right { margin-left: auto; display: flex; gap: 0.6rem; align-items: baseline; }
.chip {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-2);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 0.25em 0.8em;
  background: var(--card);
}
.chip .hot { color: var(--accent); font-weight: 700; }
button.ghost {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-2);
  background: none;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 0.25em 0.8em;
  cursor: pointer;
}
button.ghost:hover { border-color: var(--accent); color: var(--ink); }

/* ---------- shared ---------- */

main { max-width: 1020px; margin: 0 auto; padding: 1.5rem 1.25rem 4rem; }
section[hidden] { display: none; }

.panel {
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
}
.panel + .panel { margin-top: 1rem; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.8rem;
}

button.primary {
  font-family: var(--mono);
  font-size: 0.95rem;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 10px;
  padding: 0.6em 1.6em;
  cursor: pointer;
}
button.primary:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
button.plain {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 0.45em 1em;
  cursor: pointer;
}
button.plain:hover { border-color: var(--accent); }
button:disabled { opacity: 0.45; cursor: default; }

input[type="text"], input[type="number"], textarea, select {
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 0.5em 0.7em;
}
textarea { width: 100%; resize: vertical; line-height: 1.5; }

.note { color: var(--ink-2); font-size: 0.92rem; }
.fine { color: var(--muted); font-size: 0.85rem; font-family: var(--mono); }

kbd {
  font-family: var(--mono);
  font-size: 0.78em;
  border: 1px solid var(--hairline);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 0.05em 0.45em;
  background: var(--card-2);
}

/* ---------- today: idle ---------- */

.today-hero { text-align: center; padding: 2.2rem 1.5rem 2rem; }
.today-hero h1 { font-size: 1.7rem; font-weight: 600; margin: 0 0 0.35em; }
.today-hero .counts {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--ink-2);
  margin-bottom: 1.4rem;
}
.today-hero .counts b { color: var(--ink); font-size: 1.25rem; font-weight: 600; }
.load-bars { display: flex; gap: 4px; justify-content: center; align-items: flex-end; height: 44px; margin: 1.6rem auto 0.4rem; }
.load-bars span { width: 18px; background: var(--card-2); border-radius: 3px 3px 0 0; min-height: 2px; }
.load-bars span.now { background: var(--accent); }
.load-caption { margin-top: 0; }

details.about { margin-top: 1rem; }
details.about summary { cursor: pointer; font-family: var(--mono); font-size: 0.85rem; color: var(--muted); }
details.about p { max-width: 62ch; }

/* ---------- today: session ---------- */

.progress { height: 4px; background: var(--card-2); border-radius: 2px; overflow: hidden; margin-bottom: 1rem; }
.progress i { display: block; height: 100%; background: var(--accent); width: 0; transition: width 0.25s ease; }

.review { max-width: 720px; margin: 0 auto; }
.review-card { padding: 1.5rem 1.75rem 1.25rem; }
.review-meta { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; margin-bottom: 0.9rem; }
.tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--ink-2);
  background: var(--card-2);
  border-radius: 999px;
  padding: 0.2em 0.75em;
}
.review-meta .practice-tag { color: var(--hard); background: var(--hard-bg); }
.prompt { font-size: 1.1rem; }
.prompt .katex-display { margin: 0.9em 0; }

.timer { height: 3px; background: var(--card-2); border-radius: 2px; margin: 1rem 0 0.9rem; overflow: hidden; }
.timer i { display: block; height: 100%; width: 0; background: var(--muted); transition: width 1s linear, background 0.3s; }
.timer.over i { background: var(--hard); }

.answer-row { display: flex; gap: 0.6rem; align-items: center; flex-wrap: wrap; }
.answer-row input {
  flex: 1;
  min-width: 200px;
  font-size: 1.05rem;
  padding: 0.55em 0.8em;
}
.answer-row input.right { border-color: var(--good); background: var(--good-bg); }
.answer-row input.wrong { border-color: var(--again); background: var(--again-bg); }
.parse-note { color: var(--again); font-family: var(--mono); font-size: 0.8rem; min-height: 1.2em; margin: 0.4rem 0 0; }

.choices { display: grid; gap: 0.5rem; margin-top: 0.4rem; }
.choices button {
  text-align: left;
  font-size: 1rem;
  font-family: var(--serif);
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 0.6em 0.9em;
  cursor: pointer;
  display: flex; gap: 0.7em; align-items: baseline;
}
.choices button:hover { border-color: var(--accent); }
.choices button .idx { font-family: var(--mono); font-size: 0.75rem; color: var(--muted); }
.choices button.right { border-color: var(--good); background: var(--good-bg); }
.choices button.wrong { border-color: var(--again); background: var(--again-bg); }

.hint-row { margin-top: 0.9rem; display: flex; gap: 0.7rem; align-items: baseline; flex-wrap: wrap; }
.hint-text { color: var(--ink-2); font-size: 0.95rem; font-style: italic; }

.outcome { margin-top: 1.1rem; border-top: 1px solid var(--hairline); padding-top: 1rem; }
.verdict { font-family: var(--mono); font-size: 0.85rem; font-weight: 700; margin: 0 0 0.5rem; }
.verdict.ok { color: var(--good); }
.verdict.no { color: var(--again); }
.solution { color: var(--ink-2); font-size: 0.98rem; }
.solution .katex-display { margin: 0.7em 0; }

.grade-row { display: flex; gap: 0.5rem; align-items: center; margin-top: 1rem; flex-wrap: wrap; }
.grade-row .lead { font-family: var(--mono); font-size: 0.75rem; color: var(--muted); }
.grade {
  font-family: var(--mono);
  font-size: 0.8rem;
  border: 1px solid var(--hairline);
  border-radius: 8px;
  background: var(--card);
  color: var(--ink-2);
  padding: 0.4em 0.9em;
  cursor: pointer;
}
.grade small { display: block; font-size: 0.68rem; color: var(--muted); }
.grade.g1.on { border-color: var(--again); background: var(--again-bg); color: var(--again); }
.grade.g2.on { border-color: var(--hard); background: var(--hard-bg); color: var(--hard); }
.grade.g3.on { border-color: var(--good); background: var(--good-bg); color: var(--good); }
.grade.g4.on { border-color: var(--easy); background: var(--easy-bg); color: var(--easy); }
.grade.on small { color: inherit; }

.session-card-enter { animation: rise 0.16s ease-out; }
@keyframes rise {
  from { opacity: 0; transform: translateY(7px); }
  to { opacity: 1; transform: none; }
}

.done-summary td { padding: 0.2em 1em 0.2em 0; }
.done-actions { display: flex; gap: 0.6rem; justify-content: center; flex-wrap: wrap; margin-top: 1.4rem; }
.skill-delta { display: flex; justify-content: space-between; gap: 1rem; font-size: 0.95rem; padding: 0.15em 0; }

/* ---------- cards ---------- */

.toolbar { display: flex; gap: 0.6rem; flex-wrap: wrap; align-items: center; margin-bottom: 1rem; }
.toolbar .spacer { flex: 1; }

table.cards { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
table.cards th {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--muted); font-weight: 500;
  text-align: left; padding: 0.4em 0.8em 0.4em 0; border-bottom: 1px solid var(--hairline);
}
table.cards td { padding: 0.45em 0.8em 0.45em 0; border-bottom: 1px solid var(--hairline); }
table.cards .mono { font-size: 0.8rem; color: var(--ink-2); }
table.cards .actions { white-space: nowrap; text-align: right; }
table.cards .actions button { margin-left: 0.3rem; }
table.cards tr.suspended td { opacity: 0.45; }

.editor-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 1.25rem; }
@media (max-width: 860px) { .editor-grid { grid-template-columns: 1fr; } }
.editor-grid label {
  display: block;
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--muted);
  margin: 0.9rem 0 0.3rem;
}
.editor-grid input[type="text"] { width: 100%; }
.editor-errors { color: var(--again); font-family: var(--mono); font-size: 0.8rem; white-space: pre-wrap; }
.preview-box { background: var(--paper); border: 1px dashed var(--hairline); border-radius: 10px; padding: 0.9rem 1.1rem; }

/* ---------- skills ---------- */

.skill-row { display: grid; grid-template-columns: 200px minmax(0,1fr) auto auto; gap: 1rem; align-items: center; padding: 0.5rem 0; border-bottom: 1px solid var(--hairline); }
.skill-row:last-child { border-bottom: none; }
.skill-name { font-size: 0.98rem; }
.meter { height: 8px; background: var(--card-2); border-radius: 4px; overflow: hidden; }
.meter i { display: block; height: 100%; background: var(--accent); border-radius: 4px; }
.meter.weak i { background: var(--again); }
.meter.mid i { background: var(--hard); }
.skill-row .mono { font-size: 0.75rem; color: var(--ink-2); white-space: nowrap; }
@media (max-width: 640px) { .skill-row { grid-template-columns: 1fr; gap: 0.3rem; } }

/* ---------- stats ---------- */

.stat-chips { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-bottom: 1rem; }
.stat-chips .panel { flex: 1; min-width: 130px; padding: 0.9rem 1.1rem; }
.stat-chips .k { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.stat-chips .v { font-size: 1.5rem; font-weight: 600; margin-top: 0.15rem; }
.stat-chips .v small { font-size: 0.85rem; color: var(--muted); font-weight: 400; }
canvas.chart { width: 100%; height: 150px; display: block; }

.settings-row { display: flex; gap: 1.5rem; flex-wrap: wrap; align-items: end; }
.settings-row label { display: block; font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.3rem; }
.danger { color: var(--again); }

/* ---------- lock in ---------- */

.start-row { display: flex; gap: 0.7rem; justify-content: center; align-items: center; flex-wrap: wrap; }
.lock-group { display: inline-flex; }
.lock-group button { border-radius: 8px 0 0 8px; border-right: none; }
.lock-group select { border-radius: 0 8px 8px 0; font-size: 0.82rem; }
.lock-note { max-width: 46ch; margin: 0.9rem auto 0; }
.session-top { display: flex; gap: 0.8rem; align-items: center; margin-bottom: 1rem; }
.session-top .progress { flex: 1; margin-bottom: 0; }
.lock-chip { font-variant-numeric: tabular-nums; }
.lock-chip.low { color: var(--hard); border-color: var(--hard); }

/* ---------- notes and quick add ---------- */

.quick-add { display: grid; gap: 0.5rem; }
.quick-add input, .quick-add select { width: 100%; }
.quick-add button { justify-self: start; }
.ai-card {
  display: flex; gap: 0.7rem; align-items: baseline;
  border: 1px solid var(--hairline); border-radius: 10px;
  padding: 0.6rem 0.8rem; margin-top: 0.5rem;
  background: var(--paper);
}
.ai-card .body { min-width: 0; }
.ai-card .kind { font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.ai-card .preview { font-size: 0.95rem; margin-top: 0.15rem; overflow-wrap: break-word; }
.ai-card .preview b { color: var(--accent); }

/* ---------- heatmap ---------- */

.heatmap {
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: repeat(7, 11px);
  gap: 3px;
  overflow-x: auto;
  padding-bottom: 4px;
}
.heatmap i {
  width: 11px; height: 11px;
  border-radius: 2px;
  background: var(--card-2);
}
.heatmap i.l1 { background: color-mix(in srgb, var(--accent) 30%, var(--card-2)); }
.heatmap i.l2 { background: color-mix(in srgb, var(--accent) 55%, var(--card-2)); }
.heatmap i.l3 { background: color-mix(in srgb, var(--accent) 80%, var(--card-2)); }
.heatmap i.l4 { background: var(--accent); }
.heatmap i.future { opacity: 0.35; }

/* ---------- badges ---------- */

.badges { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.badge-chip {
  font-family: var(--mono);
  font-size: 0.75rem;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 0.35em 1em;
  color: var(--muted);
  background: var(--paper);
}
.badge-chip.earned {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  background: var(--accent-soft);
}

/* ---------- brain dump ---------- */

#dump-text { font-family: var(--serif); font-size: 1rem; margin-top: 0.8rem; }
.dump-card {
  display: flex; gap: 0.7rem; align-items: baseline;
  border-bottom: 1px solid var(--hairline);
  padding: 0.45rem 0;
}
.dump-card:last-child { border-bottom: none; }
.dump-card .mono { font-size: 0.72rem; color: var(--muted); white-space: nowrap; }

/* ---------- exam line, leeches, search ---------- */

.exam-line { font-size: 0.8rem; color: var(--ink-2); margin: 1rem 0 0; }
.exam-line b { color: var(--accent); }
.tag.leech { color: var(--again); background: var(--again-bg); }
#card-search { width: 160px; font-size: 0.82rem; }

/* ---------- input echo, steps, readiness, keys ---------- */

.input-preview {
  min-height: 1.6em;
  margin-top: 0.5rem;
  color: var(--ink-2);
  font-size: 1.05rem;
}

.step-row {
  display: flex;
  gap: 0.8rem;
  align-items: baseline;
  border-left: 2px solid var(--accent);
  padding: 0.4rem 0 0.4rem 0.9rem;
  margin: 0.6rem 0;
}
.step-row .step-n { color: var(--muted); font-size: 0.75rem; }
.step-row .katex-display { margin: 0.4em 0; }
#steps-list + button { margin-top: 0.5rem; }

.readiness { max-width: 460px; margin: 1.2rem auto 0; text-align: left; }
.readiness .skill-row { grid-template-columns: minmax(0,auto) minmax(60px,1fr) auto; }

#keys-overlay[hidden] { display: none; }
#keys-overlay {
  position: fixed; inset: 0;
  background: color-mix(in srgb, var(--ink) 35%, transparent);
  display: flex; align-items: center; justify-content: center;
  z-index: 50;
}
.keys-card {
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 1.3rem 1.7rem;
  min-width: 300px;
}
table.keys td { padding: 0.25em 0.9em 0.25em 0; font-size: 0.95rem; }
table.keys td:first-child { text-align: right; white-space: nowrap; }

/* ---------- tooltips, welcome, session chrome ---------- */

#tip {
  position: fixed; z-index: 60;
  max-width: 280px;
  background: var(--ink); color: var(--paper);
  font-family: var(--mono); font-size: 0.74rem; line-height: 1.45;
  padding: 0.45em 0.7em; border-radius: 7px;
  pointer-events: none;
  opacity: 0; transform: translateY(3px);
  transition: opacity 0.12s, transform 0.12s;
}
#tip[hidden] { display: none; }
#tip.show { opacity: 1; transform: none; }
span[data-tip], th[data-tip], label[data-tip], .k[data-tip], .load-bars[data-tip] { cursor: help; }
th[data-tip], .counts span[data-tip] {
  text-decoration: underline dotted; text-underline-offset: 3px;
  text-decoration-color: var(--muted);
}

.welcome { border-left: 3px solid var(--accent); margin-bottom: 1rem; }
.welcome p { max-width: 64ch; }
.welcome-row { display: flex; gap: 0.6rem; align-items: center; flex-wrap: wrap; }
.session-count { font-family: var(--mono); font-size: 0.75rem; color: var(--muted); white-space: nowrap; }
.keys-hint { text-align: center; margin: 0.8rem 0 0; }
.grade-row .lead { max-width: 34ch; line-height: 1.3; }

button.primary:hover { transform: translateY(-1px); box-shadow: 0 4px 12px color-mix(in srgb, var(--accent) 35%, transparent); }
.panel { transition: border-color 0.15s; }

/* ---------- micro-interactions ---------- */

button.primary, button.plain, button.ghost, .grade, .choices button {
  transition: transform 0.12s ease, border-color 0.15s, background 0.15s, color 0.15s;
}
button.primary:active, button.plain:active, .grade:active, .choices button:active { transform: scale(0.96); }
.grade.on { transform: scale(1.06); }
.answer-row input { transition: border-color 0.15s, background 0.2s; }
.answer-row input.right { animation: settle 0.35s ease; }
@keyframes settle {
  0% { transform: scale(1); }
  35% { transform: scale(1.015); }
  100% { transform: scale(1); }
}
.streak-pop { animation: pop 0.5s ease; }
@keyframes pop {
  0% { transform: scale(1); }
  40% { transform: scale(1.25); }
  100% { transform: scale(1); }
}

/* ---------- touch ---------- */

@media (max-width: 640px) {
  button.primary, button.plain, .grade, .choices button, nav.tabs a { min-height: 44px; }
  nav.tabs a { display: inline-flex; align-items: center; }
  input[type="text"], input[type="search"], input[type="number"], input[type="password"], textarea, select,
  #card-search, .lock-group select {
    font-size: 16px; /* under 16px, iOS zooms the page on focus */
  }
}

/* ---------- toast ---------- */

#toast {
  position: fixed;
  left: 50%; bottom: 1.5rem;
  transform: translateX(-50%) translateY(8px);
  background: var(--ink); color: var(--paper);
  font-family: var(--mono); font-size: 0.82rem;
  border-radius: 8px; padding: 0.5em 1.1em;
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  max-width: min(92vw, 40rem);
}
#toast.show { opacity: 1; transform: translateX(-50%); }

footer {
  border-top: 1px solid var(--hairline);
  max-width: 1020px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.78rem;
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}
footer a { color: var(--ink-2); }