:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-2: #242936;
  --border: #2e3442;
  --text: #e6e9f0;
  --muted: #9aa3b5;
  --accent: #4f7cff;
  --accent-2: #56b879;
  --danger: #ff6b6b;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hero {
  text-align: center;
  padding: 3rem 1rem 2rem;
  background: linear-gradient(135deg, #12162a 0%, #1a1d27 60%, #0f1117 100%);
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: 2.2rem;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.hero p {
  color: var(--text);
  font-size: 1.05rem;
}

.hero .sub {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.3rem;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1rem;
  flex: 1;
  width: 100%;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card h2 {
  margin-bottom: 0.75rem;
  font-size: 1.4rem;
}

.card label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--muted);
}

textarea {
  width: 100%;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  font-size: 1rem;
  resize: vertical;
  font-family: inherit;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
}

h3 {
  margin: 1.25rem 0 0.75rem;
  font-size: 1.1rem;
}

.persona-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.75rem;
}

.persona-chip {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.75rem;
  border-radius: 10px;
  cursor: pointer;
  text-align: center;
  transition: all 0.15s ease;
  font-size: 0.95rem;
}

.persona-chip:hover {
  border-color: var(--accent);
}

.persona-chip.selected {
  background: rgba(79, 124, 255, 0.18);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.persona-chip .emoji {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 0.3rem;
}

.persona-chip .desc {
  font-size: 0.75rem;
  color: var(--muted);
  display: block;
  margin-top: 0.2rem;
}

.actions {
  margin-top: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.7rem 1.4rem;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn.primary:hover:not(:disabled) {
  filter: brightness(1.15);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.status {
  color: var(--muted);
  font-size: 0.9rem;
}

.hidden {
  display: none;
}

.summary {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

.summary strong {
  color: var(--accent-2);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.result-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}

.result-card .persona-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.6rem;
  font-weight: 600;
}

.result-card .persona-head .emoji {
  font-size: 1.4rem;
}

.result-card .answer {
  font-size: 0.92rem;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
}

.result-card .meta {
  margin-top: 0.75rem;
  font-size: 0.75rem;
  color: var(--muted);
}

footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}

footer .disclaimer {
  color: var(--danger);
  margin-top: 0.4rem;
  font-size: 0.75rem;
}

.skeleton {
  opacity: 0.5;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}

/* === Quiz (육하원칙 질문지) === */
.hint {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.quiz-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}

.quiz-item .q-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 0.75rem;
}

.quiz-item .q-label .q-badge {
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  white-space: nowrap;
}

.quiz-item .q-title {
  color: var(--text);
}

.options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.option {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem 0.9rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.12s ease;
}

.option:hover {
  border-color: var(--accent);
}

.option.selected {
  background: rgba(79, 124, 255, 0.18);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

.option.other-option {
  border-style: dashed;
  color: var(--success, #56b879);
}

.option.other-option.selected {
  background: rgba(86, 184, 121, 0.15);
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.other-input {
  margin-top: 0.75rem;
  width: 100%;
}

/* === 트리 구조 === */
.hint-inline {
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 400;
}

.tree-level {
  margin-top: 0.75rem;
  padding-left: 0.75rem;
  border-left: 2px solid var(--border);
}

.tree-level .level-label {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 700;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.tree-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tree-option {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.88rem;
  transition: all 0.12s ease;
}

.tree-option:hover {
  border-color: var(--accent);
}

.tree-option.selected {
  background: rgba(79, 124, 255, 0.18);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

.tree-option.other-option {
  border-style: dashed;
}

.tree-option.other-option.selected {
  background: rgba(86, 184, 121, 0.15);
  border-color: var(--accent-2);
  color: var(--accent-2);
}

/* ============================================================
   핵심축(Core Axes) — 표본 정의
   ============================================================ */
.core-axes {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 0.5rem;
}

.axis-group {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
}

.axis-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}

.axis-tag {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--accent-2);
  background: rgba(86, 184, 121, 0.15);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
}

.axis-label {
  font-weight: 600;
  font-size: 0.95rem;
}

.axis-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.axis-chip {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.12s ease;
}

.axis-chip:hover {
  border-color: var(--accent);
}

.axis-chip.selected {
  background: rgba(79, 124, 255, 0.18);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

.axis-chip.small {
  font-size: 0.78rem;
  padding: 0.28rem 0.7rem;
}

.axis-country-box {
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.axis-country-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding-left: 0.75rem;
  border-left: 2px solid var(--border);
}

.axis-country-group.hidden {
  display: none;
}

/* ============================================================
   리서치 패널 — 파생축
   ============================================================ */
.research-panel {
  margin-top: 0.75rem;
}

.research-details summary {
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--accent-2);
  font-weight: 600;
  padding: 0.5rem 0;
}

.rp-body {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.rp-row .rp-head {
  font-size: 0.88rem;
}

.rp-examples {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.15rem;
}

.rp-footnote {
  font-size: 0.78rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 0.6rem;
  margin-top: 0.2rem;
}

/* ============================================================
   표본 크기 슬라이더
   ============================================================ */
.sample-size-control {
  margin-top: 0.5rem;
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.slider-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}

.slider-value {
  font-weight: 700;
  color: var(--accent);
  min-width: 3.5rem;
  text-align: right;
}

.combo-space-info {
  margin-top: 0.6rem;
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
}

.combo-warning {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--danger);
}

.combo-info {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--accent);
}

/* ============================================================
   표본 미리보기
   ============================================================ */
.sample-preview {
  margin-top: 0.5rem;
}

.sampling-method-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.75rem;
}

.sampling-method-row select {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.3rem 0.5rem;
  font-size: 0.85rem;
}

.dist-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.dist-label {
  width: 90px;
  flex-shrink: 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.dist-bar {
  flex: 1;
  display: flex;
  border-radius: 6px;
  overflow: hidden;
  height: 1.6rem;
  background: var(--surface);
}

.dist-seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  background: var(--accent);
}

.dist-seg:nth-child(4n+2) { background: var(--accent-2); }
.dist-seg:nth-child(4n+3) { background: #a86dff; }
.dist-seg:nth-child(4n+4) { background: #ff9f5b; }

.example-persons {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.example-person {
  font-size: 0.82rem;
  color: var(--muted);
}

/* ============================================================
   리포팅 축 확인
   ============================================================ */
.report-axes-preview {
  margin-top: 0.5rem;
  background: rgba(79, 124, 255, 0.08);
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
}

.report-row {
  margin-bottom: 0.4rem;
}

.report-key {
  display: inline-block;
  min-width: 90px;
  font-weight: 600;
  color: var(--accent);
}

.btn.small {
  font-size: 0.78rem;
  padding: 0.35rem 0.75rem;
}