:root {
  --bg: #f7f3ec;
  --card: #ffffff;
  --ink: #2b2118;
  --muted: #7a6f63;
  --accent: #9c2b2b;
  --accent-soft: #f3ded5;
  --good: #2e7d4f;
  --good-soft: #e2f2e8;
  --bad: #b3372e;
  --bad-soft: #f9e4e1;
  --gold: #b98a2e;
  --border: #e5dccd;
  --shadow: 0 2px 10px rgba(60, 40, 20, 0.08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d1915;
    --card: #29241f;
    --ink: #ede5d8;
    --muted: #a89b8a;
    --accent: #e07856;
    --accent-soft: #3d2c24;
    --good: #7cc79a;
    --good-soft: #23372b;
    --bad: #e08a80;
    --bad-soft: #402823;
    --gold: #d8b25e;
    --border: #3a332b;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.4);
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: Georgia, 'Iowan Old Style', 'Times New Roman', serif;
  line-height: 1.55;
  font-size: 17px;
}
#app { max-width: 780px; margin: 0 auto; padding: 0 14px 60px; }
#topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 2px; border-bottom: 2px solid var(--border); margin-bottom: 18px;
}
.brand { font-weight: bold; font-size: 1.1em; }
.brand .sub { font-weight: normal; color: var(--muted); font-size: 0.75em; margin-left: 6px; }
.timer {
  font-variant-numeric: tabular-nums; font-size: 1.25em; font-weight: bold;
  padding: 4px 14px; border-radius: 20px; background: var(--accent-soft); color: var(--accent);
}
.timer.low { background: var(--bad-soft); color: var(--bad); animation: pulse 1s infinite; }
.timer.over { background: var(--bad); color: #fff; }
@keyframes pulse { 50% { opacity: 0.55; } }
.hidden { display: none !important; }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  box-shadow: var(--shadow); padding: 22px 24px; margin-bottom: 16px;
}
h1 { font-size: 1.5em; margin: 0 0 10px; }
h2 { font-size: 1.25em; margin: 0 0 8px; color: var(--accent); }
h3 { font-size: 1.05em; margin: 16px 0 6px; }
.kicker {
  text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.72em;
  color: var(--muted); margin-bottom: 4px; font-family: 'Helvetica Neue', Arial, sans-serif;
}
.muted { color: var(--muted); }
.small { font-size: 0.85em; }

button {
  font-family: inherit; font-size: 1em; cursor: pointer;
  border-radius: 10px; border: 1px solid var(--border);
  background: var(--card); color: var(--ink); padding: 10px 18px;
  transition: transform 0.05s ease, background 0.15s ease;
}
button:active { transform: scale(0.98); }
button.primary {
  background: var(--accent); border-color: var(--accent); color: #fff;
  font-weight: bold; padding: 12px 26px; font-size: 1.05em;
}
button.subtle { color: var(--muted); border-style: dashed; }
button:disabled { opacity: 0.45; cursor: default; }

.choices { display: flex; flex-direction: column; gap: 10px; margin-top: 14px; }
.choices button { text-align: left; padding: 12px 16px; line-height: 1.4; }
.choices button.correct { background: var(--good-soft); border-color: var(--good); color: var(--good); font-weight: bold; }
.choices button.wrong { background: var(--bad-soft); border-color: var(--bad); color: var(--bad); }
.choices button.dim { opacity: 0.5; }

input[type=text] {
  font-family: inherit; font-size: 1.05em; width: 100%;
  padding: 12px 14px; border-radius: 10px; border: 1.5px solid var(--border);
  background: var(--bg); color: var(--ink); margin-top: 12px;
}
input[type=text]:focus { outline: 2px solid var(--accent); border-color: var(--accent); }

.latin-block {
  background: var(--accent-soft); border-left: 4px solid var(--accent);
  padding: 12px 16px; border-radius: 0 10px 10px 0; margin: 12px 0;
  font-style: italic; white-space: pre-wrap;
}
.translation-block {
  background: var(--good-soft); border-left: 4px solid var(--good);
  padding: 12px 16px; border-radius: 0 10px 10px 0; margin: 12px 0;
}
.feedback { margin-top: 14px; padding: 12px 16px; border-radius: 10px; }
.feedback.good { background: var(--good-soft); border: 1px solid var(--good); }
.feedback.bad { background: var(--bad-soft); border: 1px solid var(--bad); }
.feedback .explain { margin-top: 6px; font-size: 0.92em; }

table { border-collapse: collapse; margin: 10px 0; width: 100%; font-size: 0.95em; }
th, td { border: 1px solid var(--border); padding: 5px 10px; text-align: left; }
th { background: var(--accent-soft); }

.glosses { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 18px; margin: 10px 0; font-size: 0.93em; }
.glosses div { display: flex; justify-content: space-between; gap: 8px; border-bottom: 1px dotted var(--border); padding: 2px 0; }
.glosses i { color: var(--accent); }
@media (max-width: 540px) { .glosses { grid-template-columns: 1fr; } }

.vocab-list { margin: 10px 0; }
.vocab-list div { display: flex; gap: 10px; border-bottom: 1px dotted var(--border); padding: 4px 0; }
.vocab-list b { min-width: 42%; color: var(--accent); font-style: italic; font-weight: normal; }

.stage-dots { display: flex; gap: 8px; justify-content: center; margin: 14px 0 4px; }
.stage-dots span {
  width: 34px; height: 8px; border-radius: 4px; background: var(--border);
}
.stage-dots span.done { background: var(--good); }
.stage-dots span.now { background: var(--accent); }

.progress-count { text-align: right; color: var(--muted); font-size: 0.85em; margin-bottom: 4px; }

.day-list { display: flex; flex-direction: column; gap: 6px; margin-top: 12px; max-height: 320px; overflow-y: auto; }
.day-list button { display: flex; justify-content: space-between; font-size: 0.95em; }
.day-list .tick { color: var(--good); }
.day-list .score { color: var(--muted); font-size: 0.9em; }

.scorebar { display: flex; gap: 12px; margin: 16px 0; flex-wrap: wrap; }
.scorebox {
  flex: 1; min-width: 130px; text-align: center; padding: 14px 8px;
  border-radius: 12px; background: var(--accent-soft);
}
.scorebox .big { font-size: 1.7em; font-weight: bold; color: var(--accent); }
.scorebox .lbl { font-size: 0.8em; color: var(--muted); }

.streak { color: var(--gold); font-weight: bold; }
.center { text-align: center; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
footer.actions { margin-top: 18px; display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; }
.notice { font-size: 0.85em; color: var(--muted); margin-top: 10px; }
.pill {
  display: inline-block; padding: 2px 10px; border-radius: 12px; font-size: 0.75em;
  background: var(--accent-soft); color: var(--accent);
  font-family: 'Helvetica Neue', Arial, sans-serif; letter-spacing: 0.04em;
}