:root {
  --bg: #f6f6f4;
  --surface: #ffffff;
  --surface-hover: #fbfbfa;
  --border: #e6e4de;
  --border-strong: #d9d6cf;
  --text: #17181a;
  --text-dim: #6b6e73;
  --text-faint: #9b9da1;
  --accent: #3a5ceb;
  --accent-soft: #eef1fd;
  --danger: #d64545;
  --shadow-sm: 0 1px 2px rgba(16, 20, 24, 0.04);
  --shadow-md: 0 2px 6px rgba(16, 20, 24, 0.05), 0 1px 2px rgba(16, 20, 24, 0.04);
  --shadow-lg: 0 12px 28px rgba(16, 20, 24, 0.10), 0 2px 6px rgba(16, 20, 24, 0.05);
  --radius: 16px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 44px 0 32px;
}

.header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.site-header h1 {
  margin: 0 0 8px;
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.tagline {
  margin: 0;
  color: var(--text-dim);
  font-size: 1rem;
  max-width: 560px;
}

main {
  padding: 32px 0 64px;
}

.toolbar {
  margin-bottom: 22px;
}

#search {
  width: 100%;
  padding: 13px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.95rem;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

#search::placeholder { color: var(--text-faint); }

#search:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.dance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 16px;
}

.dance-card-wrap {
  position: relative;
}

.dance-card {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
  text-align: left;
  box-shadow: var(--shadow-sm);
}

.dance-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg);
}

.dance-card h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  padding-right: 60px;
}

.dance-card .meta {
  font-size: 0.83rem;
  color: var(--text-dim);
  margin-bottom: 2px;
}

.badge {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  margin-top: 12px;
  letter-spacing: 0.01em;
}

.hidden { display: none !important; }

.back-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  padding: 8px 0;
  margin-bottom: 16px;
  transition: color 0.15s ease;
}

.back-btn:hover { color: var(--accent); }

#dance-detail h2 {
  margin: 0 0 6px;
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.detail-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

#dance-detail .detail-meta {
  color: var(--text-dim);
  margin-bottom: 20px;
  font-size: 0.9rem;
}

.move-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.move-row {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.move-row:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateX(2px);
}

.move-row .count-tag {
  font-family: "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 3px 8px;
  border-radius: 6px;
  min-width: 44px;
  text-align: center;
}

.move-row .move-label {
  flex: 1;
  font-size: 0.97rem;
}

.diagram-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-left: 8px;
  vertical-align: middle;
}

.move-row .play-icon {
  color: var(--text-faint);
  font-size: 0.82rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.move-row:hover .play-icon {
  color: var(--accent);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 20, 22, 0.55);
  backdrop-filter: blur(2px);
}

.modal-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  max-width: 720px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 18px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  color: var(--text-dim);
  font-size: 1.3rem;
  cursor: pointer;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.modal-close:hover { color: var(--text); border-color: var(--border-strong); }

#modal-title {
  margin: 0 40px 8px 0;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

#modal-desc {
  color: var(--text-dim);
  margin-bottom: 18px;
  font-size: 0.92rem;
}

.modal-media {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
  align-items: flex-start;
}

.diagram-frame {
  flex: 0 0 200px;
  width: 200px;
}

.diagram-frame img {
  display: block;
  width: 100%;
  height: 200px;
  border-radius: 14px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.diagram-legend {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 8px;
  font-size: 0.76rem;
  color: var(--text-dim);
}

.diagram-legend span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.diagram-legend .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
}

.dot-r { background: #3a5ceb; }
.dot-l { background: #e08a3e; }

.video-frame {
  position: relative;
  width: 100%;
  flex: 1;
  padding-top: 56.25%;
  background: #000;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

@media (max-width: 560px) {
  .modal-media {
    flex-direction: column;
  }
  .diagram-frame {
    flex: none;
    width: 100%;
  }
  .diagram-frame img {
    height: auto;
    aspect-ratio: 1 / 1;
  }
}

#modal-yt-link {
  display: inline-block;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
}

#modal-yt-link:hover { text-decoration: underline; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 48px;
  color: var(--text-faint);
  font-size: 0.8rem;
}

/* ---------- auth / accounts ---------- */

.auth-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 4px;
}

.auth-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  white-space: nowrap;
}

.auth-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }

.auth-account {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.auth-email {
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: 500;
}

.link-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}

.link-btn:hover { text-decoration: underline; }

.link-btn.danger { color: var(--danger); }

/* ---------- auth modal / page modal ---------- */

.auth-modal-card {
  max-width: 380px;
}

.auth-tabs {
  display: flex;
  gap: 6px;
  margin: 0 40px 20px 0;
  border-bottom: 1px solid var(--border);
}

.auth-tab {
  background: none;
  border: none;
  padding: 8px 4px 12px;
  margin-right: 16px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-faint);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transform: translateY(1px);
}

.auth-tab.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

.field-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-dim);
  margin: 14px 0 6px;
}

.field-input {
  width: 100%;
  padding: 11px 13px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
}

.field-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.auth-error {
  color: var(--danger);
  font-size: 0.85rem;
  margin: 12px 0 0;
}

.auth-submit {
  width: 100%;
  margin-top: 20px;
  padding: 12px;
}

/* ---------- save button ---------- */

.save-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 10px;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

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

.save-btn.saved {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.detail-title-row .save-btn {
  position: static;
}

/* ---------- add to page ---------- */

.add-to-page {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
  margin-bottom: 20px;
  font-size: 0.88rem;
}

.field-label-inline {
  display: block;
  font-weight: 600;
  color: var(--text-dim);
  font-size: 0.78rem;
  margin-bottom: 8px;
}

.page-check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  cursor: pointer;
}

.text-faint { color: var(--text-faint); }

/* ---------- pages ---------- */

.pages-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.pages-header h2 {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.pages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.empty-note {
  color: var(--text-faint);
  font-size: 0.92rem;
  margin-top: 20px;
}

#my-dances-view h2,
#page-detail-view h2 {
  margin: 0 0 18px;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}