:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --ink: #2b3040;
  --ink-soft: #5b6275;
  --accent: #6c8cbf;
  --accent-deep: #4a6da7;
  --accent-soft: #e3ebf7;
  --mint: #dff2e9;
  --mint-ink: #2e7d5b;
  --amber: #fdf3d8;
  --amber-ink: #9a7413;
  --rose: #fde5e5;
  --rose-ink: #b04a4a;
  --violet: #ece6f8;
  --violet-ink: #6a4fa3;
  --border: #dfe3ee;
  --radius: 14px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-size: 17px;
  min-height: 100vh;
}
.wrap { max-width: 1180px; margin: 0 auto; padding: 24px 20px 60px; }
.screen { display: none; }
.screen.active { display: block; }

h1 { font-size: 1.7rem; letter-spacing: -0.5px; }
h2 { font-size: 1.25rem; }
.subtitle { color: var(--ink-soft); font-size: 1.06rem; margin-top: 6px; }

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 20px;
}

label { font-weight: 700; display: block; margin-bottom: 8px; }
.hint { font-size: 0.92rem; color: var(--ink-soft); margin-top: 8px; }
a { color: var(--accent-deep); }

.key-row { display: flex; gap: 8px; }
input[type="password"], input[type="text"], textarea {
  width: 100%;
  font: inherit;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: #fcfcfe;
  color: var(--ink);
}
input:focus, textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
textarea { resize: vertical; min-height: 92px; }

.eye-btn {
  flex: 0 0 auto;
  width: 52px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: #fcfcfe;
  font-size: 1.2rem;
  cursor: pointer;
}
.eye-btn:hover { background: var(--accent-soft); }

.notice {
  background: var(--accent-soft);
  border-radius: 10px;
  padding: 14px 16px;
  margin-top: 16px;
  font-size: 0.97rem;
  color: #33456b;
}
.notice strong { color: var(--accent-deep); }

.check-row { display: flex; align-items: center; gap: 10px; margin-top: 16px; font-size: 0.97rem; }
.check-row input { width: 20px; height: 20px; accent-color: var(--accent-deep); }

.btn {
  font: inherit;
  font-weight: 700;
  border: none;
  border-radius: 12px;
  padding: 13px 24px;
  cursor: pointer;
  background: var(--accent-deep);
  color: #fff;
  transition: background 0.15s;
}
.btn:hover:not(:disabled) { background: #3c5a8c; }
.btn:disabled { background: #b9c2d4; cursor: not-allowed; }
.btn.big { width: 100%; margin-top: 20px; font-size: 1.08rem; padding: 15px; }
.btn.ghost {
  background: var(--card);
  color: var(--accent-deep);
  border: 1.5px solid var(--accent-deep);
}
.btn.ghost:hover { background: var(--accent-soft); }
.btn.small { padding: 8px 16px; font-size: 0.92rem; border-radius: 10px; }

/* ===== 상단 탭 내비게이션 ===== */
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0;
}
.nav-tab {
  font: inherit;
  font-weight: 700;
  font-size: 0.98rem;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--ink-soft);
  padding: 10px 16px;
  cursor: pointer;
  margin-bottom: -2px;
}
.nav-tab:hover { color: var(--accent-deep); }
.nav-tab.active { color: var(--accent-deep); border-bottom-color: var(--accent-deep); }
.nav-side { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== 예시 질문 칩 ===== */
.example-group { margin-top: 16px; }
.example-cat { font-size: 0.9rem; font-weight: 700; color: var(--ink-soft); margin: 12px 0 6px; }
.chip {
  font: inherit;
  font-size: 0.94rem;
  background: var(--accent-soft);
  color: #33456b;
  border: 1px solid #cdd9ec;
  border-radius: 999px;
  padding: 8px 16px;
  cursor: pointer;
  margin: 3px 6px 3px 0;
  text-align: left;
}
.chip:hover { background: #d3e0f2; }
.chip.trick { background: var(--amber); border-color: #ecd9a0; color: var(--amber-ink); }
.chip.trick:hover { background: #f8e9bd; }
.chip.coach { background: var(--violet); border-color: #d4c8ee; color: var(--violet-ink); display: block; width: 100%; margin: 6px 0; }
.chip.coach:hover { background: #ddd2f0; }

/* ===== 슬라이더 ===== */
.slider-block { margin-top: 24px; }
.slider-desc {
  font-size: 0.94rem;
  color: var(--accent-deep);
  background: var(--accent-soft);
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 10px;
}
input[type="range"] { width: 100%; accent-color: var(--accent-deep); height: 34px; }
.slider-ends { display: flex; justify-content: space-between; font-size: 0.85rem; color: var(--ink-soft); }

/* ===== 한계 체험 / 질문 코치 박스 ===== */
.limit-box, .coach-box {
  display: none;
  margin-top: 14px;
  border-radius: 12px;
  padding: 16px;
}
.limit-box { background: var(--amber); border: 1px solid #ecd9a0; }
.coach-box { background: var(--violet); border: 1px solid #d4c8ee; }
.limit-box.open, .coach-box.open { display: block; }
.limit-box p { font-size: 0.94rem; color: var(--amber-ink); margin-bottom: 8px; }
.coach-box p { font-size: 0.94rem; color: var(--violet-ink); margin-bottom: 8px; }
.limit-box .chip { display: block; width: 100%; margin: 6px 0; }

/* ===== 결과 영역 ===== */
.result-block { margin-top: 26px; }
.question-echo {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 1rem;
}
.question-echo b { color: var(--accent-deep); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  border-radius: 999px;
  padding: 8px 18px;
  margin-top: 14px;
  font-size: 0.98rem;
}
.badge .dot { width: 12px; height: 12px; border-radius: 50%; }
.badge.green { background: var(--mint); color: var(--mint-ink); }
.badge.green .dot { background: #3aa876; }
.badge.yellow { background: var(--amber); color: var(--amber-ink); }
.badge.yellow .dot { background: #dcae2f; }
.badge.red { background: var(--rose); color: var(--rose-ink); }
.badge.red .dot { background: #d96a6a; }

.trick-notice {
  display: none;
  margin-top: 14px;
  background: var(--amber);
  border: 1px solid #ecd9a0;
  border-radius: 12px;
  padding: 14px 18px;
  color: var(--amber-ink);
  font-size: 0.97rem;
}
.trick-notice.show { display: block; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
  margin-top: 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  min-height: 170px;
}
.card-label {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--accent-deep);
  background: var(--accent-soft);
  align-self: flex-start;
  border-radius: 999px;
  padding: 3px 12px;
  margin-bottom: 10px;
}
.card-label.cool { color: #2b6f8f; background: #ddf0f7; }
.card-label.hot { color: #b0653a; background: #fdeadd; }
.card-body { font-size: 0.94rem; white-space: pre-wrap; word-break: break-word; }
.card-body.error { color: var(--rose-ink); }
.spinner-wrap { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 28px 0; color: var(--ink-soft); font-size: 0.9rem; }
.spinner {
  width: 30px; height: 30px;
  border: 4px solid var(--accent-soft);
  border-top-color: var(--accent-deep);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== AI 비교 분석 ===== */
.analysis-box {
  display: none;
  margin-top: 16px;
  background: var(--violet);
  border: 1px solid #d4c8ee;
  border-radius: var(--radius);
  padding: 20px;
}
.analysis-box.show { display: block; }
.analysis-box h3 { color: var(--violet-ink); font-size: 1.08rem; margin-bottom: 8px; }
.analysis-body { white-space: pre-wrap; font-size: 0.96rem; background: #fff; border-radius: 10px; padding: 14px 16px; }
.analysis-warn { font-size: 0.88rem; color: var(--violet-ink); margin-top: 10px; }

/* ===== 생각해보기 ===== */
.reflect { background: #f0f4ec; border: 1px solid #d9e3d0; }
.reflect h2 { font-size: 1.15rem; color: #4a6b3a; margin-bottom: 12px; }
.reflect ul { padding-left: 22px; }
.reflect li { margin: 8px 0; }
.reflect textarea { margin-top: 12px; background: #fff; }

/* ===== 온도 대결 ===== */
.battle-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 18px;
}
.battle-col { border-radius: var(--radius); padding: 16px; }
.battle-col.cool { background: #eaf6fb; border: 1px solid #c8e4f0; }
.battle-col.hot { background: #fdf1e7; border: 1px solid #f0d8c0; }
.battle-col h3 { font-size: 1.05rem; margin-bottom: 4px; }
.battle-col.cool h3 { color: #2b6f8f; }
.battle-col.hot h3 { color: #b0653a; }
.battle-col .col-desc { font-size: 0.88rem; color: var(--ink-soft); margin-bottom: 10px; }
.battle-col .card { margin-top: 10px; min-height: 110px; }
@media (max-width: 760px) { .battle-columns { grid-template-columns: 1fr; } }

/* ===== 확률 놀이터 ===== */
.sentence-display {
  font-size: 1.35rem;
  font-weight: 700;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  margin-top: 14px;
  min-height: 70px;
}
.sentence-display .picked { color: var(--accent-deep); }
.sentence-display .cursor { color: var(--ink-soft); font-weight: 400; font-size: 1rem; }

.prob-bars { margin-top: 16px; }
.prob-row {
  display: grid;
  grid-template-columns: 150px 1fr 64px;
  align-items: center;
  gap: 10px;
  margin: 8px 0;
  font-size: 0.96rem;
}
.prob-word { font-weight: 700; text-align: right; }
.prob-track { background: #edf0f7; border-radius: 999px; height: 26px; overflow: hidden; }
.prob-fill {
  height: 100%;
  background: linear-gradient(90deg, #8fabd6, #4a6da7);
  border-radius: 999px;
  transition: width 0.35s ease;
  min-width: 2px;
}
.prob-row.chosen .prob-fill { background: linear-gradient(90deg, #58b58c, #2e7d5b); }
.prob-row.chosen .prob-word { color: var(--mint-ink); }
.prob-pct { font-variant-numeric: tabular-nums; color: var(--ink-soft); font-size: 0.9rem; }

.hist-row .prob-fill { background: linear-gradient(90deg, #d8b064, #b98a1e); }

.playground-controls { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.pg-note {
  margin-top: 16px;
  background: var(--mint);
  border: 1px solid #c4e2d3;
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 0.96rem;
  color: var(--mint-ink);
}

/* ===== 실험 노트 ===== */
.note-entry {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-top: 12px;
}
.note-entry .note-meta { font-size: 0.85rem; color: var(--ink-soft); }
.note-entry .note-q { font-weight: 700; margin: 4px 0; }
.note-entry details { margin-top: 8px; font-size: 0.92rem; }
.note-entry summary { cursor: pointer; color: var(--accent-deep); font-weight: 700; font-size: 0.92rem; }
.note-entry .note-a { white-space: pre-wrap; background: var(--bg); border-radius: 8px; padding: 10px 12px; margin-top: 8px; }
.note-empty { color: var(--ink-soft); margin-top: 14px; }

.top-bar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.small-note { font-size: 0.85rem; color: var(--ink-soft); }
.section-desc { color: var(--ink-soft); font-size: 0.98rem; margin-top: 8px; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  .wrap { padding: 16px 14px 50px; }
  .panel { padding: 18px; }
  h1 { font-size: 1.4rem; }
  .prob-row { grid-template-columns: 104px 1fr 54px; font-size: 0.88rem; }
  .sentence-display { font-size: 1.1rem; }
}