/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:       #0f0f14;
  --surface:  #1a1a24;
  --card:     #22222e;
  --border:   #2e2e3e;
  --text:     #e8e8f0;
  --muted:    #8888a0;
  --accent:   #7c6cf0;
  --accent2:  #f06c9c;
  --cute:     #f06c9c;
  --cool:     #6cacf0;
  --emo:      #b06cf0;
  --childlike:#f0d860;
  --band:     #d08040;
  --party:    #fcb040;
  --radius:   12px;
}

html { font-size: 15px; }
body {
  font-family: 'Segoe UI', 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Nav ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; gap: .5rem;
  padding: .4rem 1rem;
  background: rgba(15,15,20,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-title {
  font-weight: 700; font-size: .95rem;
  color: var(--text);
  text-decoration: none;
}
.nav-title:hover { opacity: .8; text-decoration: none; }
.nav-github { margin-right: auto; opacity: .5; color: var(--text); display: flex; align-items: center; }
.nav-github:hover { opacity: 1; }
.nav-github svg { width: 14px; height: 14px; }
.nav-btn {
  display: flex; flex-direction: column; align-items: center;
  gap: 1px; padding: .3rem .55rem;
  border-radius: 8px;
  font-size: .55rem; font-weight: 600;
  letter-spacing: .03em;
  color: var(--muted);
  text-decoration: none;
  transition: background .2s, color .2s;
}
.nav-btn svg { width: 18px; height: 18px; }
.nav-btn:hover { background: var(--card); color: var(--text); text-decoration: none; }
.nav-btn.active { background: var(--accent); color: #fff; text-decoration: none; }

/* ===== Nav Dropdown ===== */
.nav-dropdown {
  position: relative;
}
.nav-dropdown > .nav-btn {
  cursor: pointer; border: none; background: none;
  font-family: inherit;
}
.nav-dropdown > .nav-btn::after {
  content: ''; display: inline-block;
  width: 0; height: 0;
  border-left: 3px solid transparent;
  border-right: 3px solid transparent;
  border-top: 3.5px solid currentColor;
  margin-left: 2px; vertical-align: middle;
  opacity: .55;
}
.nav-dropdown-menu {
  display: none; position: absolute;
  top: calc(100% + 4px); left: 50%; transform: translateX(-50%);
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: .3rem 0;
  min-width: 130px; z-index: 200;
  box-shadow: 0 8px 24px rgba(0,0,0,.45);
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
  display: block;
}
.nav-dropdown-menu a {
  display: block; padding: .4rem .8rem;
  font-size: .75rem; font-weight: 600;
  color: var(--muted); text-decoration: none;
  white-space: nowrap; transition: background .15s, color .15s;
}
.nav-dropdown-menu a:hover {
  background: var(--surface); color: var(--text); text-decoration: none;
}
.nav-dropdown-menu a.active {
  color: var(--accent); background: var(--surface);
}

/* ===== Cards Page ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
  padding: 2rem 1.5rem;
  max-width: 1400px;
  margin: 0 auto;
}

.song-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .2s, box-shadow .2s;
}
.song-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
}

.card-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #111;
  flex-shrink: 0;
}
.card-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  max-height: 100%;
}
.card-thumb .play-icon {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.35);
  opacity: 0; transition: opacity .2s;
  font-size: 3rem; color: #fff;
}
.song-card:hover .play-icon { opacity: 1; }

.card-thumb-placeholder {
  width: 100%; aspect-ratio: 16/9;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  font-size: 1.4rem; font-weight: 700; color: #fff;
  text-align: center; padding: 1rem;
}

.card-body { padding: 1rem 1.2rem 1.2rem; }

.card-title {
  font-size: 1.25rem; font-weight: 700;
  margin-bottom: .3rem;
}
.card-meta {
  font-size: .8rem; color: var(--muted);
  margin-bottom: .8rem;
}
.card-meta span { margin-right: .8rem; }

/* Note badge */
.card-note {
  font-size: .75rem; color: var(--accent2);
  margin-bottom: .5rem;
}

/* Unscored placeholder */
.unscored {
  text-align: center; padding: 1.2rem 0;
  font-size: .85rem; color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: 8px;
  margin-bottom: .8rem;
}

/* Map coordinate badge */
.card-coord {
  display: inline-flex; align-items: center; gap: .4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .25rem .6rem;
  font-size: .75rem; color: var(--muted);
  margin-bottom: .8rem;
}
.card-coord .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
}

/* Score bars */
.score-section { margin-bottom: .8rem; }
.score-row {
  display: flex; align-items: center; gap: .5rem;
  margin-bottom: .3rem; font-size: .78rem;
}
.score-label { width: 72px; text-align: right; color: var(--muted); flex-shrink: 0; }
.score-bar-bg {
  flex: 1; height: 8px;
  background: var(--surface);
  border-radius: 4px; overflow: hidden;
}
.score-bar {
  height: 100%; border-radius: 4px;
  transition: width .4s ease;
}
.score-val { width: 28px; font-size: .75rem; color: var(--muted); }

/* Tags */
.tags { display: flex; flex-wrap: wrap; gap: .35rem; }
.tag {
  font-size: .7rem;
  padding: .15rem .55rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  white-space: nowrap;
}

/* Summary */
.card-summary {
  font-size: .75rem;
  line-height: 1.7;
  color: var(--muted);
  margin-bottom: .6rem;
  padding: .4rem 0;
  border-top: 1px solid var(--border);
}

/* Collapsible details sections */
.card-details {
  margin-top: .5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.card-details-summary {
  display: flex; align-items: center; gap: .3rem;
  padding: .35rem .7rem;
  font-size: .72rem; font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  background: var(--surface);
  list-style: none;           /* hide default marker */
}
.card-details-summary::-webkit-details-marker { display: none; }
.card-details-summary::after {
  content: '▸';
  margin-left: auto;
  font-size: .65rem;
  transition: transform .2s;
}
.card-details[open] > .card-details-summary::after {
  transform: rotate(90deg);
}

/* Harmony note */
.harmony-note {
  padding: .5rem .7rem;
  font-size: .72rem;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

/* Lyrics hooks */
.hooks-section {
  padding: .4rem .7rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .3rem;
  font-size: .68rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}
.hook {
  padding: .1rem .4rem;
  border-radius: 4px;
  background: transparent;
  border: 1px solid color-mix(in srgb, var(--muted) 30%, transparent);
  color: var(--muted);
  white-space: nowrap;
}

/* Label */
.card-label {
  margin-top: .6rem;
  font-size: .78rem;
  font-weight: 600;
  color: var(--accent2);
}

/* ===== Map Page ===== */
.map-viewport {
  position: relative;
  width: min(90vw, 900px);
  height: min(90vw, 900px);
  margin: 1rem auto;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: grab;
  touch-action: none;
}
.map-container {
  position: relative;
  width: 100%;
  height: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: visible;
  transform-origin: center center;
  transition: transform .12s ease-out;
}

/* Zoom / Pan controls */
.map-controls {
  display: flex;
  justify-content: center;
  gap: .4rem;
  margin: .5rem auto 1.5rem;
}
.map-ctrl-btn {
  font-family: inherit;
  font-size: 1.1rem;
  width: 36px; height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s, border-color .2s;
}
.map-ctrl-btn:hover {
  background: var(--card);
  border-color: var(--accent);
}

/* Axes */
.map-axis-x, .map-axis-y {
  position: absolute;
  background: var(--border);
}
.map-axis-x {
  left: 0; right: 0;
  top: 50%; height: 1px;
}
.map-axis-y {
  top: 0; bottom: 0;
  left: 50%; width: 1px;
}

/* Axis labels */
.map-label {
  position: absolute;
  font-size: .75rem;
  color: var(--muted);
  white-space: nowrap;
  pointer-events: none;
}
.map-label-left   { left: 8px;  top: 50%; transform: translateY(-50%); color: var(--cute); font-weight: 600; }
.map-label-right  { right: 8px; top: 50%; transform: translateY(-50%); color: var(--cool); font-weight: 600; }
.map-label-top    { top: 8px;   left: 50%; transform: translateX(-50%); color: var(--childlike);  font-weight: 600; }
.map-label-bottom { bottom: 8px;left: 50%; transform: translateX(-50%); color: var(--emo);  font-weight: 600; }

/* Quadrant labels */
.map-quadrant-label {
  position: absolute;
  font-size: .7rem;
  color: var(--muted);
  opacity: .4;
  pointer-events: none;
}

/* Grid lines */
.map-grid-line {
  position: absolute;
  background: var(--border);
  opacity: .3;
}
.map-grid-line.h { left: 0; right: 0; height: 1px; }
.map-grid-line.v { top: 0; bottom: 0; width: 1px; }

/* Song point */
.map-point {
  position: absolute;
  transform: translate(-50%, -50%) scale(var(--inv-zoom, 1));
  cursor: pointer;
  z-index: 10;
  transition: z-index 0s, transform .12s;
}
.map-point:hover {
  z-index: 20;
  transform: translate(-50%, -50%) scale(calc(var(--inv-zoom, 1) * 1.15));
}

.map-point-thumb {
  width: 54px; height: 54px;
  border-radius: 6px;
  overflow: hidden;
  border: 2px solid var(--accent);
  box-shadow: 0 2px 12px rgba(0,0,0,.5);
  position: relative;
}
.map-point-thumb img {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
}
.map-point-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,.45);
  color: #fff;
  font-size: 1.1rem;
  opacity: 0;
  transition: opacity .2s;
  pointer-events: none;
}
.touch .map-point-play { display: none; }
.map-point:hover .map-point-play { opacity: 1; }
.map-point-placeholder {
  width: 54px; height: 54px;
  border-radius: 6px;
  border: 2px solid var(--accent);
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex; align-items: center; justify-content: center;
  font-size: .55rem; font-weight: 700; color: #fff;
  text-align: center; padding: 2px;
}

.map-point-title {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  font-size: .68rem;
  font-weight: 600;
  margin-top: 3px;
  color: var(--text);
  text-shadow: 0 1px 4px rgba(0,0,0,.8);
  white-space: nowrap;
  pointer-events: none;
}

/* Tooltip (floating, appended to body) */
.map-tooltip {
  display: none;
  position: fixed;
  background: var(--card);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: 8px;
  padding: .6rem .8rem;
  min-width: 180px;
  max-width: 260px;
  font-size: .75rem;
  box-shadow: 0 4px 16px rgba(0,0,0,.5);
  z-index: 9999;
  pointer-events: none;
}
.map-tooltip.visible { display: block; pointer-events: auto; }
.map-tooltip .tt-header { display: flex; align-items: flex-start; justify-content: space-between; gap: .4rem; }
.map-tooltip .tt-title { font-weight: 700; font-size: .85rem; margin-bottom: .3rem; flex: 1; }
.map-tooltip .tt-close {
  display: none;
  width: 24px; height: 24px;
  border: none; background: transparent;
  color: var(--muted); font-size: 1.1rem; line-height: 1;
  cursor: pointer; padding: 0; margin: -2px -4px 0 0;
  border-radius: 4px; flex-shrink: 0;
}
.map-tooltip .tt-close:active { background: rgba(255,255,255,.1); }
.touch .map-tooltip .tt-close { display: flex; align-items: center; justify-content: center; }
.map-tooltip .tt-row { display: flex; justify-content: space-between; gap: .8rem; color: var(--muted); }
.map-tooltip .tt-youtube {
  display: none;
  margin-top: .35rem;
  font-size: .75rem;
  color: var(--accent);
  text-decoration: underline;
}
.touch .map-tooltip .tt-youtube { display: inline-block; }

/* ===== Map Tabs ===== */
/* (map-tabs removed — A/B switching is now in nav) */

.map-title {
  text-align: center;
  margin: .4rem 0 0;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1.2;
  color: var(--fg);
}

.map-subtitle {
  text-align: center;
  margin: .15rem 0 .2rem;
  font-size: .78rem;
  line-height: 1.2;
  color: var(--muted);
}

.map-wrap.hidden {
  display: none;
}

/* ===== Card coordinate badges (dual) ===== */
.card-coords {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-bottom: .8rem;
}

.dot-a { background: var(--accent) !important; }
.dot-b { background: var(--accent2) !important; }

.coord-note {
  font-size: .68rem;
  opacity: .7;
}

/* ===== Score groups ===== */
.score-group {
  margin-bottom: .4rem;
}
.score-group:last-child {
  margin-bottom: 0;
}
.score-group-label {
  font-size: .62rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: .15rem;
  opacity: .5;
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .cards-grid { grid-template-columns: 1fr; padding: 1rem; }
  .map-title { margin: .2rem 0 0; font-size: .88rem; }
  .map-subtitle { margin: .1rem 0 .15rem; font-size: .7rem; }
  .map-viewport { width: 95vw; height: 95vw; }
  .map-point-thumb, .map-point-placeholder { width: 42px; height: 42px; }
  .map-point-title { font-size: .58rem; }
  .map-ctrl-btn { width: 44px; height: 44px; font-size: 1.25rem; border-radius: 10px; }
  .map-controls { gap: .5rem; margin: .6rem auto 1rem; }
}

/* Tap feedback for touch devices */
.touch .map-point:active {
  transform: translate(-50%, -50%) scale(calc(var(--inv-zoom, 1) * 0.9));
  transition: transform 0s;
}