/* ==========================================================================
   댄스 연습 일정 분석 — 스타일
   ========================================================================== */

:root {
  --accent: #2C3E50;
  --accent-soft: #34495E;
  --bg: #F7F9FB;
  --card-bg: #FFFFFF;
  --border: #E1E8ED;
  --muted: #7F8C8D;
  --text: #2C3E50;
  --primary: #3498DB;
  --primary-hover: #2E86C1;
  --shadow-sm: 0 1px 2px rgba(20,30,50,0.05);
  --shadow-md: 0 4px 12px rgba(20,30,50,0.08);
  --radius: 8px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "맑은 고딕", "Malgun Gothic", "Segoe UI",
    "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

h1, h2, h3 { margin: 0; font-weight: 700; }
button { font-family: inherit; cursor: pointer; }

.muted { color: var(--muted); }
.hidden { display: none !important; }

/* ---------- Header ---------- */

.app-header {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.app-header h1 {
  font-size: 22px;
  letter-spacing: -0.5px;
}
.header-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-meta .muted {
  color: rgba(255,255,255,0.7);
  font-size: 13px;
}

.primary-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 13px;
  transition: background 0.15s;
}
.primary-btn:hover { background: var(--primary-hover); }

/* ---------- Alert / Error ---------- */

.alert-banner {
  background: #FFF4E5;
  border-bottom: 2px solid #E67E22;
  color: #7E3F00;
  padding: 12px 24px;
  text-align: center;
  font-weight: 600;
}

.error {
  background: #FDECEA;
  border: 1px solid #E74C3C;
  color: #922B21;
  padding: 16px;
  border-radius: var(--radius);
  margin: 16px 24px;
}

.loading {
  padding: 40px;
  text-align: center;
  color: var(--muted);
  font-size: 15px;
}

/* ---------- Controls ---------- */

.controls {
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.controls-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  align-items: center;
}
.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 200px;
}
.control-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.threshold-readout {
  background: var(--accent);
  color: #fff;
  padding: 2px 10px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 12px;
}
.control-group input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
}

.toggle-group {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}
.toggle-btn {
  background: #fff;
  border: none;
  padding: 8px 14px;
  font-size: 13px;
  color: var(--text);
  border-right: 1px solid var(--border);
  transition: background 0.15s, color 0.15s;
}
.toggle-btn:last-child { border-right: none; }
.toggle-btn:hover { background: #F4F8FB; }
.toggle-btn.active {
  background: var(--accent);
  color: #fff;
}

/* ---------- Sections ---------- */

main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}
.output-section {
  margin-bottom: 40px;
}
.output-section > h2 {
  font-size: 18px;
  margin-bottom: 4px;
  color: var(--accent);
}
.section-desc {
  color: var(--muted);
  margin: 4px 0 16px 0;
  font-size: 13px;
}

/* ---------- Song card ---------- */

.song-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.song-header {
  padding: 14px 18px;
  background: linear-gradient(180deg, #FAFBFC 0%, #F4F6F8 100%);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.song-header h3 {
  font-size: 16px;
  color: var(--accent);
}
.capacity-badge {
  background: var(--accent-soft);
  color: #fff;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}
.view-toggle {
  margin-left: auto;
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}

/* ---------- Heatmap table ---------- */

.heatmap-wrap {
  overflow-x: auto;
  padding: 0 4px;
}
table.heatmap {
  border-collapse: separate;
  border-spacing: 2px;
  width: 100%;
  margin: 12px 0;
  font-size: 13px;
}
table.heatmap th {
  background: #F4F6F8;
  padding: 6px 8px;
  font-weight: 600;
  font-size: 12px;
  color: var(--accent-soft);
  border-radius: 4px;
  white-space: nowrap;
}
table.heatmap th.corner { background: transparent; }
table.heatmap th.slot-label {
  background: #ECF0F1;
  text-align: right;
  min-width: 90px;
}
table.heatmap th .wd {
  font-weight: 400;
  color: var(--muted);
}

table.heatmap td.cell {
  text-align: center;
  font-weight: 700;
  font-size: 16px;
  border-radius: 4px;
  padding: 8px 6px;
  min-width: 64px;
  vertical-align: middle;
}
table.heatmap.heatmap-detailed td.cell {
  text-align: left;
  vertical-align: top;
  padding: 8px;
  min-width: 130px;
}
.cell-count {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}
.cell-members {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}

/* ---------- Member chip ---------- */

.member-chip {
  display: inline-block;
  background: rgba(255,255,255,0.55);
  color: inherit;
  border: 1px solid rgba(0,0,0,0.08);
  padding: 1px 6px;
  border-radius: 8px;
  font-size: 11px;
  font-weight: 500;
  white-space: nowrap;
}
.member-chip.mijeong {
  border-color: #B7950B;
  background: rgba(241,196,15,0.18);
}
.member-chip.partial {
  border-style: dashed;
}
.member-chip.missing {
  background: #FDECEA;
  color: #922B21;
  border-color: #E74C3C;
}

/* ---------- Summary block ---------- */

.song-summary {
  padding: 12px 18px 18px 18px;
  background: #FAFBFC;
  border-top: 1px solid var(--border);
  font-size: 13px;
}
.summary-block {
  margin-bottom: 6px;
}
.summary-block:last-child { margin-bottom: 0; }
.summary-block strong {
  color: var(--accent);
  margin-right: 6px;
}
.summary-block.muted { color: var(--muted); font-style: italic; }

/* ---------- Candidate cards ---------- */

.candidate-list {
  padding: 16px 18px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 14px;
}
.candidate-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.cand-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  padding-left: 10px;
}
.cand-title {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.cand-date {
  font-weight: 700;
  font-size: 14px;
  color: var(--accent);
}
.cand-time {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}
.cand-dur {
  font-size: 12px;
  color: var(--muted);
}
.cand-badge {
  padding: 6px 10px;
  border-radius: 16px;
  font-weight: 700;
  font-size: 13px;
  flex-shrink: 0;
  white-space: nowrap;
}
.cand-details {
  font-size: 12px;
}
.cand-details > summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent-soft);
  padding: 4px 0;
  list-style: revert;
}
.cand-members {
  margin-top: 6px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

/* ---------- Footer & misc ---------- */

.app-footer {
  text-align: center;
  color: var(--muted);
  padding: 24px;
  font-size: 12px;
}

.empty {
  padding: 16px;
  color: var(--muted);
  font-style: italic;
  text-align: center;
}

/* ---------- Responsive ---------- */

@media (max-width: 720px) {
  .header-inner { padding: 12px 16px; }
  .app-header h1 { font-size: 18px; }
  .controls-inner { padding: 12px 16px; gap: 16px; }
  main { padding: 16px; }
  .control-group { min-width: 100%; }
  .candidate-list { grid-template-columns: 1fr; padding: 12px; }
  .song-header { padding: 12px; }
  .song-header h3 { font-size: 15px; }
  .view-toggle { margin-left: 0; }
  table.heatmap td.cell { min-width: 48px; font-size: 14px; padding: 6px 4px; }
  table.heatmap.heatmap-detailed td.cell { min-width: 110px; }
}