:root {
  --bg: #f7f5f0;
  --card-bg: #ffffff;
  --ink: #2a2a28;
  --muted: #7a7568;
  --accent: #b5482f;
  --accent-soft: #f0d9c9;
  --good: #4a7c59;
  --hard: #c98a2b;
  --again: #b5482f;
  --easy: #2f6f8f;
  --border: #e6e1d6;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Pretendard", "Noto Sans KR", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); }
#app { max-width: 640px; margin: 0 auto; min-height: 100vh; padding-bottom: 40px; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px; border-bottom: 1px solid var(--border); background: var(--card-bg);
}
.topbar h1 { font-size: 17px; margin: 0; }
.topbar nav a, .topbar > a { color: var(--muted); text-decoration: none; margin-left: 16px; font-size: 14px; }
.topbar nav a.active { color: var(--accent); font-weight: 600; }
.topbar .progress { color: var(--muted); font-size: 14px; }

.home { padding: 24px 20px; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 24px; }
.stat { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 14px; text-align: center; }
.stat .num { display: block; font-size: 22px; font-weight: 700; color: var(--accent); }
.stat .lbl { display: block; font-size: 11px; color: var(--muted); margin-top: 2px; }

.today-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 16px; padding: 24px; text-align: center; }
.today-card h2 { margin: 0 0 6px; }
.today-card .chapters { color: var(--muted); font-size: 14px; margin-bottom: 18px; }

button { font: inherit; cursor: pointer; border: none; border-radius: 10px; padding: 12px 18px; }
button.primary { background: var(--accent); color: #fff; font-weight: 600; }
button.wide { width: 100%; padding: 16px; font-size: 16px; }
button.ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
button.small { padding: 6px 12px; font-size: 12px; }
.controls { text-align: center; margin-top: 16px; }

.study { padding: 20px; }
.card-meta { color: var(--muted); font-size: 12px; margin-bottom: 8px; text-align: center; }
.prompt-card, .answer-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 16px; padding: 28px 20px; text-align: center; margin-bottom: 16px; }
.ko-text { font-size: 22px; font-weight: 600; line-height: 1.5; margin: 0 0 10px; }
.hint { color: var(--muted); font-size: 13px; margin: 0; }
.en-text { font-size: 20px; color: var(--accent); font-weight: 600; margin: 0 0 16px; line-height: 1.5; }
.answer-card audio { width: 100%; margin-bottom: 12px; }

.grade-buttons { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.grade { color: #fff; font-size: 13px; font-weight: 600; }
.grade.again { background: var(--again); }
.grade.hard { background: var(--hard); }
.grade.good { background: var(--good); }
.grade.easy { background: var(--easy); }

.empty { text-align: center; padding: 80px 20px; }
.empty a { color: var(--accent); }

.script { padding: 20px; }
.script-hint { margin: 0 0 16px; font-size: 13px; }
.script-day { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; margin-bottom: 8px; overflow: hidden; }
.script-day-header { width: 100%; display: flex; justify-content: space-between; align-items: center; background: transparent; border: none; padding: 14px 16px; font-weight: 600; font-size: 14px; color: var(--ink); text-align: left; border-radius: 0; }
.script-day-header .chevron { color: var(--muted); }
.script-body { border-top: 1px solid var(--border); }
.script-row { padding: 14px 16px; border-bottom: 1px solid var(--border); }
.script-row:last-child { border-bottom: none; }
.script-ko { font-weight: 600; margin-bottom: 4px; }
.script-en { color: var(--accent); margin-bottom: 8px; }
.script-row-controls { display: flex; align-items: center; gap: 8px; }
.script-row-controls audio { flex: 1; height: 32px; }
.muted { color: var(--muted); font-weight: 400; }

.browse { padding: 20px; }
#filterInput { width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border); margin-bottom: 16px; font-size: 14px; }
.browse-row { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 14px; margin-bottom: 10px; }
.browse-meta { font-size: 11px; color: var(--muted); margin-bottom: 6px; }
.browse-ko { font-weight: 600; margin-bottom: 4px; }
.browse-en { color: var(--accent); margin-bottom: 8px; }
.browse-row audio { width: 100%; height: 32px; }
.empty-text { color: var(--muted); text-align: center; }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1a17; --card-bg: #262320; --ink: #ece7dd; --muted: #93897a; --border: #3a352e;
  }
}