/* Hugh's Hand — teacher app. Mobile-first, vanilla. */

:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #eef0f3;
  --text: #1a1c1f;
  --text-dim: #5b6169;
  --border: #d9dde2;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --danger: #c0392b;
  --ok: #1e874b;
  --star: #e8a71c;
  --radius: 14px;
  --tap: 48px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --surface: #1e2126;
    --surface-2: #262a31;
    --text: #eceef1;
    --text-dim: #9aa2ad;
    --border: #343a43;
    --accent: #4b8bff;
    --danger: #ff6b5e;
    --ok: #45c684;
    --star: #f2b53a;
  }
}

* { box-sizing: border-box; margin: 0; }
html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}
#app {
  max-width: 560px;
  margin: 0 auto;
  padding: max(16px, env(safe-area-inset-top)) 16px calc(24px + env(safe-area-inset-bottom));
  min-height: 100%;
}

.loading { color: var(--text-dim); padding: 40px 0; text-align: center; }

/* --- typography / layout helpers --- */
h1 { font-size: 1.35rem; }
h2 { font-size: 1rem; color: var(--text-dim); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.row { display: flex; gap: 10px; align-items: center; }
.between { display: flex; gap: 10px; align-items: center; justify-content: space-between; }
.stack { display: flex; flex-direction: column; gap: 14px; }
.muted { color: var(--text-dim); }
.spacer { flex: 1; }

/* --- controls --- */
button, .btn {
  font: inherit;
  min-height: var(--tap);
  padding: 0 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
button:active { transform: translateY(1px); }
button.primary { background: var(--accent); color: var(--accent-text); border-color: transparent; font-weight: 600; }
button.ghost { background: transparent; }
button.danger { color: var(--danger); }
button.wide { width: 100%; }
button:disabled { opacity: .5; cursor: default; }

input[type=email], input[type=password], input[type=text] {
  font: inherit;
  width: 100%;
  min-height: var(--tap);
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
}

/* --- cards --- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.card.tap { cursor: pointer; }
.card.tap:active { background: var(--surface-2); }

/* --- discbar extras --- */
.pillbox { display: flex; align-items: center; gap: 8px; min-width: 0; }
.here { font-size: .8rem; color: var(--text-dim); white-space: nowrap; font-variant-numeric: tabular-nums; }
.installhint { line-height: 1.4; margin-top: 6px; }

/* --- course link --- */
.code { font-size: .85rem; color: var(--text-dim); margin: 8px 0 4px; display: flex; align-items: center; gap: 2px; flex-wrap: wrap; }
.code input {
  font: inherit; min-height: 0; padding: 3px 6px; width: auto;
  border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text);
}
.code .err { color: var(--danger); margin-left: 6px; }

/* --- slide links panel --- */
.slidep { font-size: .85rem; margin: 4px 0; }
.slidep summary { color: var(--accent); cursor: pointer; width: max-content; }
.slidep p { margin: 8px 0; }
.slidep label { display: block; margin-bottom: 8px; }
.slidep input { font: inherit; min-height: 34px; padding: 3px 8px; margin-left: 8px;
  border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text); }
.linkout { display: flex; gap: 8px; align-items: center; }
.linkout code { flex: 1; overflow-x: auto; white-space: nowrap; background: var(--surface-2);
  padding: 6px 8px; border-radius: 8px; font-size: .78rem; }
.linkout button { min-height: 34px; padding: 0 12px; }

/* --- discussion chips --- */
.chips { display: flex; gap: 6px; overflow-x: auto; padding: 8px 0 4px; -webkit-overflow-scrolling: touch; }
.chip {
  flex: 0 0 auto; min-height: 34px; padding: 0 12px; font-size: .85rem;
  border: 1px solid var(--border); border-radius: 999px;
  background: var(--surface); color: var(--text-dim); white-space: nowrap;
}
.chip.cur { border-color: var(--accent); color: var(--text); font-weight: 600; }
.chip.open::before { content: "● "; color: var(--ok); }
.chip.paused::before { content: "❙❙ "; color: var(--star); font-size: .7em; }
.chip.newd { color: var(--accent); border-style: dashed; }

/* --- discussion bar --- */
.discbar { position: sticky; top: 0; z-index: 5; padding-top: 8px; background: var(--bg); }
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px; font-size: .82rem; font-weight: 600;
  background: var(--surface-2); color: var(--text-dim);
}
.pill.open { background: color-mix(in srgb, var(--ok) 20%, transparent); color: var(--ok); }
.pill.paused { background: color-mix(in srgb, var(--star) 22%, transparent); color: var(--star); }

/* --- on-deck card --- */
.ondeck { border-color: var(--accent); }
.ondeck .who { font-size: 1.3rem; font-weight: 700; }
.stars { display: flex; gap: 8px; margin-top: 12px; }
.stars button {
  flex: 1; min-width: 0; padding: 0; font-size: 1.15rem; font-weight: 700;
}
.stars button[data-v="0"] { color: var(--text-dim); }
.stars button.pick { background: var(--star); border-color: transparent; color: #1a1c1f; }

/* --- queue --- */
.queue { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.queue li {
  display: flex; align-items: center; gap: 12px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px 14px; min-height: var(--tap); cursor: pointer;
}
.queue li:active { background: var(--surface-2); }
.queue.held { opacity: .55; pointer-events: none; }
.queue .num { width: 22px; text-align: center; color: var(--text-dim); font-variant-numeric: tabular-nums; }
.queue .who { font-weight: 600; }
.qname, .deck-name { display: flex; align-items: center; gap: 10px; min-width: 0; }
.qname .nm, .deck-name .nm { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.qname .who { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.qname .sub-p, .deck-name .sub-p { font-weight: 400; font-size: .78rem; color: var(--text-dim); }
.deck-name .who { font-size: 1.3rem; font-weight: 700; }
.av { width: 34px; height: 34px; border-radius: 50%; object-fit: cover; flex: 0 0 auto; background: var(--surface-2); }
.av.ph { display: inline-block; }
.deck-name .av { width: 52px; height: 52px; }
.av.sm { width: 26px; height: 26px; }
.queue .wait { margin-left: auto; color: var(--text-dim); font-size: .85rem; font-variant-numeric: tabular-nums; }
.photobtn { display: block; padding: 12px 0; color: var(--accent); cursor: pointer; font-size: .9rem; }
.roster li { gap: 10px; }
.backup { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 6px; }
.xs { font-size: .78rem; }
.empty { color: var(--text-dim); text-align: center; padding: 28px 0; }

/* --- roster --- */
textarea {
  font: inherit; width: 100%; padding: 12px 14px; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--surface); color: var(--text); resize: vertical;
}
.roster { list-style: none; display: flex; flex-direction: column; }
.roster li { display: flex; gap: 10px; align-items: center; padding: 11px 4px; border-top: 1px solid var(--border); }
.roster li > span:not(.av) { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.roster li.dim span { color: var(--text-dim); text-decoration: line-through; }
.roster li.hdr { color: var(--text-dim); font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; padding-top: 18px; border: none; }
.linky { background: none; border: none; color: var(--text-dim); font: inherit; font-size: .85rem; text-decoration: underline; cursor: pointer; }

.toast {
  position: fixed; left: 50%; bottom: calc(20px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  background: var(--text); color: var(--bg);
  padding: 10px 16px; border-radius: 999px; font-size: .9rem;
  opacity: 0; transition: opacity .2s; pointer-events: none; z-index: 20;
}
.toast.show { opacity: .95; }
.err { color: var(--danger); font-size: .9rem; }