/* DESIGN.md §13, §14. Every colour is a custom property; dark values follow the system. */

@font-face {
  font-family: "EB Garamond";
  src: url("fonts/eb-garamond-latin-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: light dark;

  --paper: #ffffff;
  --ink: #000000;
  --accent: #b23318;
  --quiet: color-mix(in srgb, var(--ink) 70%, var(--paper));
  --veil: color-mix(in srgb, var(--ink) 55%, transparent);

  --voice: "EB Garamond", Garamond, Georgia, serif;
  --record: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --t-0: 1.375rem;
  --t-1: 1.719rem;
  --t-2: 2.148rem;
  --t-3: 2.686rem;
  --t-4: 3.357rem;

  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 1rem;
  --s-4: 2rem;
  --s-5: 4rem;
  --s-6: 8rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #000000;
    --ink: #ffffff;
    --accent: #ff6a3d;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--voice);
  font-size: 100%;
  line-height: 1.35;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-size: var(--t-0);
}

h2, p, ul, ol, fieldset, legend { margin: 0; padding: 0; }
ul { list-style: none; }
fieldset { border: 0; min-width: 0; }

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

.num, .big, .mono, input.dur {
  font-family: var(--record);
  font-variant-numeric: tabular-nums;
}
.num, .mono { font-size: 0.88em; }

/* ---------- page ---------- */

.page {
  display: grid;
  gap: var(--s-4);
  padding: var(--s-3);
  padding-bottom: calc(var(--s-4) + env(safe-area-inset-bottom));
  max-width: 80rem;
  margin: 0 auto;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas: "status" "work" "side";
}
.status { grid-area: status; }
.work { grid-area: work; display: grid; gap: var(--s-3); min-width: 0; }
.side { grid-area: side; display: grid; gap: var(--s-3); align-content: start; }

@media (min-width: 900px) {
  .page {
    grid-template-columns: minmax(0, 1fr) 22rem;
    grid-template-areas: "status status" "work side";
  }
}

.status:empty, .line:empty { display: none; }
.status p, .line { color: var(--quiet); }

/* ---------- controls ---------- */

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

button {
  min-height: 2.75rem;
  min-width: 2.75rem;
  padding: var(--s-1) var(--s-3);
  background: none;
  border: 1px solid currentColor;
  border-radius: 0;
  cursor: pointer;
}
button:disabled { color: var(--quiet); border-style: dotted; cursor: default; }
button.link {
  border: 0;
  padding-inline: var(--s-2);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

:focus-visible { outline: 2px solid currentColor; outline-offset: 2px; }

input[type="text"], select {
  min-height: 2.75rem;
  padding: var(--s-1) var(--s-2);
  background: var(--paper);
  border: 1px solid var(--quiet);
  border-radius: 0;
}
input[type="text"], select { width: 100%; }
input.dur { max-width: 12rem; }
input[type="checkbox"], input[type="radio"] { width: 1.25rem; height: 1.25rem; accent-color: var(--ink); }

/* ---------- layout toggle ---------- */

.toggle { display: flex; gap: var(--s-2); }
.toggle button[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ---------- panes ---------- */

.panes { display: flex; gap: var(--s-3); min-width: 0; }
.panes:empty { display: none; }

.panes.row {
  overflow-x: auto;
  scroll-snap-type: x mandatory;
}
.panes.row > .pane {
  flex: 0 0 100%;
  scroll-snap-align: start;
}
@media (min-width: 700px) {
  .panes.row > .pane { flex: 1 1 0; min-width: 14rem; }
}

.panes.main { flex-direction: column; }
.panes.main > .pane { flex: 1 1 auto; }
@media (min-width: 700px) {
  .panes.main { flex-direction: row; align-items: flex-start; }
  .panes.main > .pane { flex: 2 1 0; }
  .panes.main > .panel { flex: 1 1 0; }
}

.pane {
  container-type: inline-size;
  display: grid;
  gap: var(--s-2);
  padding: var(--s-3);
  border: 1px solid var(--quiet);
  min-width: 0;
  transition: background-color 200ms, color 200ms, border-color 200ms;
}
.pane .name { font-size: var(--t-1); font-weight: 400; line-height: 1.2; }
.pane .sub:empty { display: none; }
.pane .word { color: var(--quiet); }
.pane .big {
  font-size: 24cqi;
  line-height: 1;
  white-space: nowrap;
}
.pane .big[data-long] { font-size: 17cqi; }
.pane .small { color: var(--quiet); }
.pane .acts { display: flex; flex-wrap: wrap; gap: var(--s-2); align-items: center; margin-top: var(--s-2); }
.pane .check { display: inline-flex; align-items: center; gap: var(--s-2); min-height: 2.75rem; }

.pane.signal, .pane.ended, .compact.signal, .compact.ended {
  background: var(--accent);
  color: var(--paper);
  border-color: var(--accent);
}
.pane.signal .word, .pane.ended .word,
.pane.signal .small, .pane.ended .small { color: var(--paper); }
.pane.signal input, .pane.ended input { accent-color: var(--paper); }

/* ---------- session strip ---------- */

.strip {
  position: relative;
  display: flex;
  height: 0.625rem;
  margin-block: var(--s-1);
}
.strip[hidden] { display: none; }
.strip .blk { flex: 0 0 auto; height: 100%; box-shadow: inset 0 0 0 1px var(--quiet); }
.strip .blk.brk { background: var(--quiet); }
.strip .mark {
  position: absolute;
  top: -0.25rem;
  bottom: -0.25rem;
  width: 2px;
  margin-left: -1px;
  background: currentColor;
}
.pane.signal .strip .blk { box-shadow: inset 0 0 0 1px var(--paper); }
.pane.signal .strip .blk.brk { background: var(--paper); }

/* ---------- side panel of the main layout ---------- */

.panel { display: grid; gap: var(--s-2); align-content: start; min-width: 0; }
.compact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0 var(--s-3);
  width: 100%;
  text-align: left;
  border-color: var(--quiet);
  padding: var(--s-2) var(--s-3);
  transition: background-color 200ms, color 200ms, border-color 200ms;
}
.compact .name { grid-row: span 2; align-self: center; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.compact .big-num { text-align: right; }
.compact .end { text-align: right; color: var(--quiet); }
.compact.signal .end, .compact.ended .end { color: var(--paper); }
.compact .end[hidden] { display: none; }

/* ---------- presets ---------- */

.presets { display: grid; }
.preset {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0 var(--s-3);
  align-items: center;
  padding-block: var(--s-2);
  border-top: 1px solid var(--quiet);
}
.preset:last-child { border-bottom: 1px solid var(--quiet); }
.preset .name { font-size: var(--t-1); }
.preset .summary { grid-column: 1; color: var(--quiet); }
.preset .summary:empty { display: none; }
.preset .acts { grid-column: 2; grid-row: 1 / span 2; display: flex; gap: var(--s-2); }
#new { justify-self: start; }
.heading { font-size: var(--t-1); font-weight: 400; color: var(--quiet); }

/* ---------- dialog ---------- */

dialog {
  width: min(34rem, calc(100vw - 2 * var(--s-3)));
  max-height: calc(100dvh - 2 * var(--s-3));
  padding: var(--s-3);
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--ink);
  overflow-y: auto;
}
dialog::backdrop { background: var(--veil); }
#form { display: grid; gap: var(--s-3); }
#form h2 { font-size: var(--t-2); font-weight: 400; line-height: 1.15; }
#d-custom, #d-custom-2, #d-start { display: grid; gap: var(--s-3); }
#form [hidden] { display: none; }

.field { display: grid; gap: var(--s-1); }
.grades legend { margin-bottom: var(--s-1); }
.check { display: inline-flex; align-items: center; gap: var(--s-2); min-height: 2.75rem; }

.err { flex-basis: 100%; }
.err:empty { display: none; }
.invalid input:not([type="radio"]), .invalid .grade { outline: 2px solid var(--ink); outline-offset: 1px; }

#d-grades { display: grid; gap: var(--s-2); }
.grade {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  gap: var(--s-1) var(--s-2);
  align-items: center;
  padding: var(--s-2);
  border: 1px solid var(--quiet);
  cursor: pointer;
}
.grade .what { display: flex; flex-wrap: wrap; gap: 0 var(--s-3); align-items: baseline; }
.grade .action:empty { display: none; }
.grade .gline { grid-column: 2 / -1; color: var(--quiet); }

.note summary { cursor: pointer; min-height: 2.75rem; display: flex; align-items: center; }
.note ul { display: grid; gap: var(--s-2); color: var(--quiet); }

#form > .acts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  position: sticky;
  bottom: calc(-1 * var(--s-3));
  padding-block: var(--s-2) var(--s-3);
  margin-bottom: calc(-1 * var(--s-3));
  background: var(--paper);
  border-top: 1px solid var(--quiet);
}

@media (prefers-reduced-motion: reduce) {
  .pane, .compact { transition: none; }
}