/* Track B. Plain CSS, no external fonts or images (CSP: style-src 'self', font-src 'self', img-src 'self'). */
:root {
  --bg: #ffffff;
  --fg: #1b1f24;
  --muted: #4b5563;
  --line: #c7ccd4;
  --panel: #f4f6f8;
  --accent: #1d4ed8;
  --accent-fg: #ffffff;
  --ok: #0f5132;
  --ok-bg: #e3f4ea;
  --warn: #7a4a00;
  --warn-bg: #fff3d6;
  --bad: #8a1c1c;
  --bad-bg: #fde8e8;
  --info: #1e3a8a;
  --info-bg: #e6edfb;
  --run: #374151;
  --run-bg: #eceff3;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161b;
    --fg: #e8ebef;
    --muted: #b4bbc5;
    --line: #3b434d;
    --panel: #1b2128;
    --accent: #8ab4ff;
    --accent-fg: #0b1220;
    --ok: #9ae6b4;
    --ok-bg: #12301f;
    --warn: #ffd37a;
    --warn-bg: #3a2c0c;
    --bad: #ffb4b4;
    --bad-bg: #3d1515;
    --info: #b7ccff;
    --info-bg: #172544;
    --run: #d1d5db;
    --run-bg: #2a313a;
  }
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { font-size: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.45;
}

h1, h2 { line-height: 1.2; margin: 0 0 0.5rem; }
h1 { font-size: 1.25rem; }
h2 { font-size: 1.1rem; }

.top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--line);
}
.top h1 { margin: 0; }
.who { margin: 0; color: var(--muted); overflow-wrap: anywhere; flex: 1 1 12rem; }

main { padding: 1rem; max-width: 72rem; margin: 0 auto; }

.stack { display: flex; flex-direction: column; gap: 0.5rem; max-width: 40rem; }
.row { display: flex; flex-wrap: wrap; gap: 0.5rem; }

label { font-weight: 600; }

input[type="email"], input[type="password"], input[type="text"], textarea {
  width: 100%;
  font: inherit;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--muted);
  border-radius: 6px;
  padding: 0.6rem 0.7rem;
  min-height: 2.75rem;
}
textarea { resize: vertical; }

button {
  font: inherit;
  font-weight: 600;
  min-height: 2.75rem;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-fg);
  cursor: pointer;
}
button.secondary { background: transparent; color: var(--accent); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

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

.notice {
  margin: 0 0 1rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--warn);
  border-left-width: 6px;
  background: var(--warn-bg);
  color: var(--warn);
  border-radius: 6px;
  overflow-wrap: anywhere;
}

fieldset.choices { border: 1px solid var(--line); border-radius: 6px; padding: 0.5rem 0.75rem 0.75rem; margin: 0; }
fieldset.choices legend { font-weight: 600; padding: 0 0.25rem; }
.choice { display: flex; align-items: flex-start; gap: 0.6rem; font-weight: 400; padding: 0.4rem 0; min-height: 2.75rem; }
.choice input { flex: none; width: 1.25rem; height: 1.25rem; margin-top: 0.2rem; }
.choice-text { overflow-wrap: anywhere; }
.choice-detail, .hint, .empty, .usage { color: var(--muted); }
.hint { margin: 0; overflow-wrap: anywhere; }
.qr { display: block; max-width: 100%; height: auto; background: #ffffff; border: 1px solid var(--line); margin: 0.75rem 0; }
.secret { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 1.05rem; font-weight: 700;
  overflow-wrap: anywhere; user-select: all; margin: 0.25rem 0 1rem; padding: 0.5rem 0.7rem; background: var(--panel);
  border: 1px solid var(--line); border-radius: 6px; max-width: 40rem; }
#view-enrol p { max-width: 40rem; }

.toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem; margin-bottom: 1rem; }
.run-state { margin: 0; font-weight: 600; }

.panes { display: grid; grid-template-columns: 1fr; gap: 1.25rem; }
@media (min-width: 52rem) {
  .panes { grid-template-columns: 3fr 2fr; align-items: start; }
}
.pane { min-width: 0; }

.chat {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  min-height: 8rem;
  max-height: 60vh;
  overflow-y: auto;
  padding: 0.5rem;
  margin-bottom: 0.75rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.msg { padding: 0.5rem 0.7rem; border-radius: 6px; border: 1px solid var(--line); background: var(--bg); }
.msg p { margin: 0; }
.msg-who { font-size: 0.85rem; font-weight: 700; color: var(--muted); }
.msg-text { white-space: pre-wrap; overflow-wrap: anywhere; }
.msg-user { border-color: var(--accent); }
.msg-review { border-width: 2px; border-color: var(--warn); background: var(--warn-bg); color: var(--warn); }
.msg-review .msg-who { color: var(--warn); }
.msg-error { border-color: var(--bad); background: var(--bad-bg); color: var(--bad); }
.msg-error .msg-who { color: var(--bad); }
.msg-system, .msg-file { background: var(--info-bg); color: var(--info); }
.msg-file .msg-who { color: var(--info); }
a.download { color: var(--info); font-weight: 700; overflow-wrap: anywhere; }

.steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.5rem; }
.pipe-note { color: var(--muted); font-size: 0.9rem; border-bottom: 1px solid var(--line); padding-bottom: 0.25rem; }
.pipe-turn { font-weight: 700; color: var(--fg); }
.step { border: 1px solid var(--line); border-left-width: 6px; border-radius: 6px; padding: 0.5rem 0.7rem; background: var(--bg); }
.step p { margin: 0; }
.step-head { display: flex; flex-wrap: wrap; gap: 0.25rem 0.6rem; align-items: baseline; }
.step-status { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em; }
.step-label { font-weight: 600; overflow-wrap: anywhere; }
.step-meta { font-size: 0.85rem; color: var(--muted); overflow-wrap: anywhere; }
.step-running { border-left-color: var(--run); }
.step-running .step-status { color: var(--run); }
.step-ok { border-left-color: var(--ok); }
.step-ok .step-status { color: var(--ok); }
.step-flag { border-left-color: var(--warn); }
.step-flag .step-status { color: var(--warn); }
.step-error { border-left-color: var(--bad); }
.step-error .step-status { color: var(--bad); }

.flags { list-style: none; margin: 0.35rem 0 0; padding: 0; display: flex; flex-direction: column; gap: 0.3rem; }
.flags:empty { display: none; }
.flag { padding: 0.3rem 0.5rem; border-radius: 4px; font-size: 0.9rem; overflow-wrap: anywhere; }
.flag-level { font-weight: 700; text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.03em; }
.level-info { background: var(--info-bg); color: var(--info); }
.level-warning { background: var(--warn-bg); color: var(--warn); }
.level-blocking { background: var(--bad-bg); color: var(--bad); }

@media (max-width: 30rem) {
  main { padding: 0.75rem; }
  .top { padding: 0.6rem 0.75rem; }
  button { width: 100%; }
  .row button, .top button { width: auto; flex: 1 1 auto; }
}