/* Tokens follow culqi360: neutral greys, ink as the one accent, hairline borders. */
:root {
  color-scheme: light dark;
  --font: "Inter Variable", Inter, system-ui, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --bg: #f9f9f9;
  --surface: #fff;
  --ink: #333;
  --ink-2: #666;
  --ink-3: #999;
  --line: #ececec;
  --line-strong: #d6d6d6;
  --fill: #f4f4f4;
  --on-ink: #fff;
  --del: #fbe3e3;
  --ins: #dff3e4;
  --danger: #bf3333;
  --radius: 8px;
  --radius-sm: 4px;
  --ring: 0 0 0 1px #333b, 0 0 0 3px #3333;
  --shadow: 0 2px 4px #0000000a, 0 0 4px #00000014;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #191919;
    --surface: #171717;
    --ink: #ebebeb;
    --ink-2: #b3b3b3;
    --ink-3: #818181;
    --line: #262626;
    --line-strong: #3a3a3a;
    --fill: #1d1d1d;
    --on-ink: #171717;
    --del: #4a2323;
    --ins: #1f3d29;
    --danger: #e07070;
    --ring: 0 0 0 1px #ebebebb0, 0 0 0 3px #ebebeb30;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font: 14px/1.5 var(--font);
  color: var(--ink);
  background: var(--bg);
}
:focus-visible { outline: none; box-shadow: var(--ring); }

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
header h1 { margin: 0; font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
#who { display: flex; align-items: center; gap: 12px; color: var(--ink-2); font-size: 13px; }
.progress { display: flex; align-items: center; gap: 8px; color: var(--ink-3); font-size: 12px; }
.bar { width: 96px; height: 4px; border-radius: 2px; background: var(--line); overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--ink); }

main { flex: 1; width: 100%; max-width: 1120px; margin: 0 auto; padding: 24px 20px; }
footer { padding: 16px 20px; color: var(--ink-3); font-size: 12px; text-align: center; }
footer a { color: var(--ink-2); }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.welcome { max-width: 420px; margin: 8vh auto 0; padding: 28px; }
.welcome h2 { margin: 0 0 8px; font-size: 20px; letter-spacing: -0.01em; }
.welcome p { margin: 0 0 20px; color: var(--ink-2); }
.welcome .actions { display: grid; gap: 8px; }

.meta { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; color: var(--ink-3); font-size: 12px; }
.tag {
  padding: 1px 8px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 11px;
}

.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }
@media (max-width: 800px) { .pair { grid-template-columns: 1fr; } }
.scan { position: sticky; top: 16px; padding: 8px; }
.scan img { display: block; width: 100%; border-radius: var(--radius-sm); background: #fff; }
.work { padding: 16px; display: grid; gap: 12px; }

label, .label { display: block; margin-bottom: 4px; color: var(--ink-3); font-size: 12px; font-weight: 500; }
textarea {
  width: 100%;
  min-height: 11rem;
  padding: 10px 12px;
  resize: vertical;
  font: 13px/1.5 var(--mono);
  color: var(--ink);
  background: var(--fill);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.preview {
  min-height: 3rem;
  padding: 10px 12px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.row .grow { flex: 1; }
button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 14px;
  font: inherit;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 150ms cubic-bezier(0.2, 0, 0, 1);
}
button:hover, .btn:hover { background: var(--fill); }
button.primary { color: var(--on-ink); background: var(--ink); border-color: var(--ink); }
button.primary:hover { opacity: 0.9; background: var(--ink); }
button.ghost { border-color: transparent; background: none; color: var(--ink-2); }
button.ghost:hover { background: var(--fill); }
button:disabled { opacity: 0.5; cursor: default; }
.error { margin: 0; color: var(--danger); font-size: 13px; }

details.readings { margin-top: 16px; padding: 12px 16px; }
details.readings summary { cursor: pointer; color: var(--ink-2); font-size: 13px; font-weight: 500; }
details.readings .pair { margin-top: 12px; }
details.readings .pair > div { font: 12px/1.6 var(--mono); overflow-wrap: anywhere; }
del { background: var(--del); text-decoration: line-through; border-radius: 2px; }
ins { background: var(--ins); text-decoration: none; border-radius: 2px; }

.done { max-width: 420px; margin: 8vh auto 0; padding: 28px; text-align: center; color: var(--ink-2); }