:root {
  --bg: #f4f6fb;
  --bg-grad: radial-gradient(1200px 600px at 50% -10%, #dbe4ff 0%, transparent 70%);
  --surface: #ffffff;
  --surface-2: #f1f3f9;
  --text: #1b1f2a;
  --text-dim: #666e82;
  --text-faint: #98a0b3;
  --border: #e2e6f0;
  --accent: #4463f0;
  --accent-soft: #e8ecff;
  --correct: #12a05c;
  --correct-soft: #e2f6ec;
  --wrong: #db3b52;
  --wrong-soft: #fdeaed;
  --shadow: 0 10px 30px rgba(30, 40, 80, .08);
  --radius: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12141c;
    --bg-grad: radial-gradient(1200px 600px at 50% -10%, #232a4a 0%, transparent 70%);
    --surface: #1b1e29;
    --surface-2: #232735;
    --text: #eceff7;
    --text-dim: #a3abbf;
    --text-faint: #737b8f;
    --border: #2c3140;
    --accent: #7d93ff;
    --accent-soft: #262d4d;
    --correct: #3ed08b;
    --correct-soft: #163024;
    --wrong: #ff7089;
    --wrong-soft: #331920;
    --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }

/* display 를 지정한 클래스가 hidden 속성을 덮어쓰지 않도록 한다. */
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  background-image: var(--bg-grad);
  background-repeat: no-repeat;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Pretendard",
               "Noto Sans KR", "Malgun Gothic", "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

.app {
  max-width: 560px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.en { color: var(--text-faint); font-weight: 400; }

/* ── 히어로 ─────────────────────────────────────────── */
.hero { text-align: center; padding: 24px 0 20px; }
.hero-emoji { font-size: 56px; line-height: 1; }
.hero h1 {
  margin: 12px 0 6px;
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -.5px;
}
.hero-sub { margin: 0; color: var(--text-dim); font-size: 15px; }
.hero-sub .en { font-size: 13px; }

/* ── 카드 ───────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

.field { margin-bottom: 18px; }
.field-label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dim);
  margin-bottom: 8px;
}
.field-label .en { font-size: 12px; font-weight: 400; }

/* ── 칩 선택 ────────────────────────────────────────── */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-dim);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s, transform .1s;
}
.chip:hover { border-color: var(--accent); color: var(--text); }
.chip:active { transform: scale(.97); }
.chip[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.pool-info {
  margin: 4px 0 14px;
  font-size: 13px;
  color: var(--text-faint);
  text-align: center;
}

.best-record {
  margin: 12px 0 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-faint);
  min-height: 20px;
}

/* ── 버튼 ───────────────────────────────────────────── */
.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 13px 18px;
  font-size: 15px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: filter .15s, transform .1s, background .15s;
}
.btn:active { transform: scale(.985); }
.btn-block { display: block; width: 100%; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--border);
}
.btn-secondary:hover { border-color: var(--accent); }
.btn-ghost { background: transparent; color: var(--text-faint); }
.btn-ghost:hover { color: var(--text); }
.result-actions .btn + .btn { margin-top: 8px; }

/* ── 퀴즈 상단 ──────────────────────────────────────── */
.quiz-top { margin: 8px 0 18px; }
.progress-track {
  height: 8px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.progress-bar {
  height: 100%;
  width: 0;
  background: var(--accent);
  border-radius: 999px;
  transition: width .3s ease;
}
.quiz-meta {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

/* ── 문제 카드 ──────────────────────────────────────── */
.question-card { text-align: center; padding: 26px 20px; }
.question-label { margin: 0 0 10px; font-size: 13px; color: var(--text-dim); font-weight: 600; }
.question-label .en { font-size: 12px; }
.q-country {
  margin: 0;
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -1px;
  word-break: keep-all;
}
.q-country-en { margin: 4px 0 0; font-size: 15px; color: var(--text-faint); }
.q-region {
  display: inline-block;
  margin: 12px 0 0;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
}

/* ── 선택지 ─────────────────────────────────────────── */
.choices { display: grid; gap: 10px; margin-top: 16px; }
.choice {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .1s;
}
.choice:hover:not(:disabled) { border-color: var(--accent); }
.choice:active:not(:disabled) { transform: scale(.99); }
.choice:disabled { cursor: default; }
.choice-key {
  flex: none;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--surface-2);
  color: var(--text-faint);
  font-size: 12px;
  font-weight: 700;
}
.choice-text { flex: 1; }
.choice-text .en { display: block; font-size: 12px; font-weight: 400; }
.choice-mark { flex: none; font-size: 17px; }

.choice.is-correct { border-color: var(--correct); background: var(--correct-soft); }
.choice.is-correct .choice-key { background: var(--correct); color: #fff; }
.choice.is-wrong { border-color: var(--wrong); background: var(--wrong-soft); }
.choice.is-wrong .choice-key { background: var(--wrong); color: #fff; }
.choice.is-dim { opacity: .5; }

/* ── 주관식 ─────────────────────────────────────────── */
.typing { display: flex; gap: 8px; margin-top: 16px; }
.typing-input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 12px;
  padding: 13px 14px;
  font-size: 16px;
  font-family: inherit;
}
.typing-input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.typing .btn { flex: none; }

/* ── 피드백 ─────────────────────────────────────────── */
.feedback {
  margin-top: 16px;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  text-align: center;
}
.feedback.ok { border-color: var(--correct); background: var(--correct-soft); }
.feedback.no { border-color: var(--wrong); background: var(--wrong-soft); }
.feedback-title { margin: 0 0 4px; font-size: 18px; font-weight: 800; }
.feedback.ok .feedback-title { color: var(--correct); }
.feedback.no .feedback-title { color: var(--wrong); }
.feedback-answer { margin: 0 0 14px; font-size: 15px; color: var(--text-dim); }
.feedback-answer strong { color: var(--text); }

#btn-quit { margin-top: 20px; }

/* ── 결과 ───────────────────────────────────────────── */
.result-card { text-align: center; padding: 32px 20px; }
.result-emoji { font-size: 56px; line-height: 1; }
.result-title { margin: 12px 0 8px; font-size: 24px; font-weight: 800; }
.result-score {
  margin: 0;
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -1px;
  font-variant-numeric: tabular-nums;
}
.result-score #result-correct { color: var(--accent); }
.result-rate { margin: 2px 0 0; color: var(--text-dim); font-size: 14px; }
.result-new-best { margin: 10px 0 0; color: var(--correct); font-weight: 700; font-size: 14px; }
.result-actions { margin-top: 22px; }

.review { margin-top: 20px; }
.review-title {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-dim);
  padding-left: 4px;
}
.review-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 8px;
  font-size: 15px;
}
.review-item .rv-mark { flex: none; }
.review-item .rv-body { flex: 1; min-width: 0; }
.review-item .rv-country { font-weight: 700; }
.review-item .rv-en { color: var(--text-faint); font-size: 12px; margin-left: 4px; }
.review-item .rv-answer { color: var(--text-dim); font-size: 13px; }
.review-item .rv-answer strong { color: var(--text); }
.review-item .rv-yours { color: var(--wrong); }

/* ── 푸터 ───────────────────────────────────────────── */
.footer {
  margin-top: 28px;
  text-align: center;
  font-size: 12px;
  color: var(--text-faint);
  display: flex;
  gap: 8px;
  justify-content: center;
}
.footer a { color: var(--text-faint); text-decoration: none; }
.footer a:hover { color: var(--accent); text-decoration: underline; }

@media (max-width: 380px) {
  .q-country { font-size: 28px; }
  .typing { flex-direction: column; }
  .typing .btn { width: 100%; }
}