:root {
  --bg: #fbfaf8;
  --panel: #ffffff;
  --ink: #1c1a17;
  --dim: #6f6a63;
  --line: #e6e1d9;
  --accent: #b4472e;
  --ok: #2f7d54;
  --warn: #b8892b;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14130f;
    --panel: #1d1b17;
    --ink: #f0ece4;
    --dim: #9b948a;
    --line: #2e2b25;
    --accent: #e0714f;
    --ok: #62b98a;
    --warn: #d6a84e;
  }
}

* { box-sizing: border-box; }
/* 저자 스타일의 display 가 [hidden] 의 UA 규칙을 이긴다.
   .answer{flex} · .empty{grid} 등이 숨겨지지 않던 문제 — 전역으로 못박는다. */
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR",
        "Malgun Gothic", system-ui, sans-serif;
  display: flex;
  flex-direction: column;
}

/* ---- login gate ---- */
.gate {
  margin: auto;
  padding: 32px;
  width: min(360px, 90vw);
  text-align: center;
}
.gate h1 { font-size: 30px; letter-spacing: .06em; margin: 0 0 24px; }
.gate form { display: grid; gap: 10px; }
.gate input, .gate button {
  padding: 12px 14px; font-size: 16px;
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--panel); color: var(--ink);
}
.gate button { background: var(--accent); color: #fff; border: 0; cursor: pointer; }
.err { color: var(--accent); font-size: 14px; }

/* ---- shell ---- */
#app { display: flex; flex-direction: column; min-height: 100%; }
header {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; letter-spacing: .06em; }
.spacer { flex: 1; }
.chip, .stat {
  font-size: 13px; color: var(--dim);
  border: 1px solid var(--line); border-radius: 999px; padding: 3px 10px;
}
.ghost {
  background: none; border: 1px solid var(--line); color: var(--dim);
  border-radius: 999px; padding: 4px 12px; font-size: 13px; cursor: pointer;
}

/* ---- card ---- */
.card {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 14px; padding: 24px 16px; text-align: center;
}
.meta { display: flex; gap: 6px; }
.badge {
  font-size: 12px; padding: 2px 9px; border-radius: 999px;
  background: var(--accent); color: #fff;
}
.badge.dim { background: transparent; color: var(--dim); border: 1px solid var(--line); }
.badge.new { background: var(--warn); color: #17150f; }

.hanzi {
  font-size: clamp(52px, 16vw, 96px); line-height: 1.15; font-weight: 600;
  letter-spacing: .04em;
}
.sub { font-size: 22px; color: var(--dim); letter-spacing: .1em; }
.gloss { font-size: 17px; color: var(--ink); max-width: 34ch; }

.toneForm { display: flex; gap: 8px; margin-top: 8px; }
.toneForm input {
  width: 220px; padding: 12px 14px; font-size: 20px; text-align: center;
  letter-spacing: .16em;
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--panel); color: var(--ink);
}
.toneForm button, .reveal {
  padding: 12px 18px; font-size: 16px; border: 0; border-radius: 10px;
  background: var(--accent); color: #fff; cursor: pointer;
}
.reveal { background: transparent; color: var(--dim); border: 1px solid var(--line); }

/* ---- answer ---- */
.answer {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  padding: 18px; width: min(520px, 92vw);
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
}
.pinyin { font-size: 30px; letter-spacing: .04em; }
.pattern { font-size: 20px; letter-spacing: .22em; }
.pattern .hit { color: var(--ok); }
.pattern .miss { color: var(--accent); text-decoration: underline wavy; }
.meanings { margin: 0; padding: 0; list-style: none; color: var(--dim); font-size: 15px; }
.meanings li + li::before { content: "· "; }
.meanings li { display: inline; }

.grades { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-top: 6px; }
.grades button {
  padding: 10px 14px; font-size: 15px; cursor: pointer;
  border: 1px solid var(--line); border-radius: 10px;
  background: transparent; color: var(--ink);
}
.grades .primary, .primary { background: var(--accent); color: #fff; border-color: transparent; }

.empty { flex: 1; display: grid; place-content: center; gap: 14px; text-align: center; }

/* ---- settings ---- */
dialog {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); color: var(--ink); padding: 20px;
  width: min(420px, 92vw);
}
dialog::backdrop { background: rgba(0,0,0,.45); }
dialog h2 { margin: 0 0 14px; font-size: 18px; }
dialog fieldset { border: 1px solid var(--line); border-radius: 10px; margin: 0 0 12px; }
dialog legend { color: var(--dim); font-size: 13px; padding: 0 6px; }
dialog label { display: block; font-size: 15px; margin: 4px 0; }
dialog input[type=number] { width: 90px; padding: 6px 8px; margin-left: 8px;
  border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink); }
.levels { display: flex; gap: 10px; flex-wrap: wrap; }
.levels label { display: inline-flex; align-items: center; gap: 4px; }
.hint { font-size: 13px; color: var(--dim); }
dialog menu { display: flex; gap: 8px; justify-content: flex-end; padding: 0; margin: 14px 0 0; }
dialog menu button { padding: 8px 14px; border-radius: 8px; border: 1px solid var(--line);
  background: transparent; color: var(--ink); cursor: pointer; }

footer {
  padding: 14px 16px; border-top: 1px solid var(--line);
  color: var(--dim); font-size: 12px; text-align: center;
}
footer a { color: var(--dim); }

.meanings-en {
  color: var(--dim);
  font-size: 13px;
  opacity: .75;
  max-width: 42ch;
}

/* ---------------------------------------------------------- 객관식 보기 */
/* 처음 보는 성조 카드와 최소대립쌍 연습이 함께 쓴다. */
/* 2 x 2 고정. flex-wrap 으로 두면 3+1 로 접혀 버튼 크기가 제각각이 된다 —
   보기 크기가 다르면 그 자체가 힌트로 읽힌다. */
.choices {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px;
  width: min(380px, 92vw);
}
.choice {
  padding: 16px 12px; font-size: 19px; min-height: 58px;
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--panel); color: var(--ink); cursor: pointer;
}
.choice:hover:not(:disabled) { border-color: var(--accent); }
.choice:disabled { cursor: default; opacity: .95; }
.choice.right { border-color: var(--ok); color: var(--ok); font-weight: 600; }
.choice.wrong { border-color: var(--accent); color: var(--accent); text-decoration: line-through; }

/* 뜻→단어 카드에서 같은 뜻을 가진 다른 단어 */
.synonyms { color: var(--dim); font-size: 13px; max-width: 42ch; }

/* ------------------------------------------------------------- 연습 모드 */
.drill { flex: 1; display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 14px; padding: 20px 16px; text-align: center; }
.drill h2 { margin: 0; font-size: 20px; }
.drill h3 { margin: 10px 0 2px; font-size: 15px; color: var(--dim); font-weight: 600; }
.drillPick, .drillRun, .drillDone {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  width: min(560px, 100%);
}
.patterns { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; width: 100%; }
.patterns .pattern {
  padding: 10px 4px; font-size: 15px; cursor: pointer;
  border: 1px solid var(--line); border-radius: 8px;
  background: var(--panel); color: var(--ink);
}
.patterns .pattern:hover { border-color: var(--accent); }
.drillRun .meta { display: flex; align-items: center; gap: 8px; width: 100%; }
#btnDrillNext {
  padding: 14px 40px; font-size: 18px; min-width: 180px;
  border: 0; border-radius: 10px; cursor: pointer;
}
.feedback { font-size: 16px; }
.feedback.ok { color: var(--ok); }
.feedback.no { color: var(--accent); }
.score { font-size: 32px; font-weight: 600; margin: 0; }
.wrongList { color: var(--dim); font-size: 14px; max-width: 42ch; }
.drillDone menu { display: flex; gap: 8px; padding: 0; margin: 6px 0 0; flex-wrap: wrap;
  justify-content: center; }
.drillDone menu button { padding: 8px 14px; border-radius: 8px;
  border: 1px solid var(--line); background: transparent; color: var(--ink); cursor: pointer; }