/* ============================================================
   mai_sync_selector — Arcade Native
   hot pink × cyan on warm ink, glow as data
   ============================================================ */

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

:root {
  /* Surface ladder, warm ink */
  --bg-base: #0b0814;
  --bg-surface: #15101f;
  --bg-elevated: #1f1830;
  --bg-hover: #2a2142;
  --bg-input: #120d1c;

  --line: rgba(255,255,255,0.07);
  --line-strong: rgba(255,255,255,0.14);

  --ink: #f6f3ff;
  --ink-soft: #c5bfde;
  --ink-mute: #7a7290;
  --ink-faint: #4a435c;

  /* Brand signature */
  --p1: #ff2c81;
  --p1-soft: #ff5fa3;
  --p1-glow: rgba(255,44,129,0.45);
  --p1-wash: rgba(255,44,129,0.12);

  --p2: #22d3ee;
  --p2-soft: #67e8f9;
  --p2-glow: rgba(34,211,238,0.45);
  --p2-wash: rgba(34,211,238,0.12);

  /* Difficulty (game-strict) */
  --d-basic: #6fd96f;
  --d-advanced: #ffc23a;
  --d-expert: #ff5d5d;
  --d-master: #b06bff;
  --d-remaster-a: #ffd6f4;
  --d-remaster-b: #d6e7ff;

  --r-pill: 999px;
  --r-md: 10px;
  --r-sm: 6px;
  --r-card: 16px;

  --shadow-card: 0 1px 0 rgba(255,255,255,0.04) inset, 0 8px 24px rgba(0,0,0,0.35);
  --shadow-bloom: 0 0 0 1px rgba(255,255,255,0.04), 0 12px 36px rgba(0,0,0,0.45);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --font-display: "Sora", "Space Grotesk", ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

html, body { height: 100%; }
body {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.45;
  color: var(--ink);
  background: var(--bg-base);
  background-image:
    radial-gradient(900px 500px at 12% -10%, rgba(255,44,129,0.10), transparent 60%),
    radial-gradient(900px 500px at 92% -8%, rgba(34,211,238,0.10), transparent 60%);
  background-attachment: fixed;
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ===== App shell ===== */
.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
  padding-top: max(20px, env(safe-area-inset-top, 0px));
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
  padding-bottom: max(28px, env(safe-area-inset-bottom, 0px));
}

/* ===== Header / brand ===== */
.header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 4px 0 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
  flex: 1 1 auto;
}
.brand-glyph {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--p1) 0%, var(--p2) 100%);
  color: #0b0814;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.04em;
  box-shadow: 0 8px 24px rgba(255,44,129,0.35), 0 8px 24px rgba(34,211,238,0.25);
  align-self: center;
}
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.015em;
  background: linear-gradient(92deg, #ffd6e9 0%, var(--p1-soft) 35%, var(--p2-soft) 75%, #d8f6fb 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand-version {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-mute);
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
}
.header-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.icon-btn, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  background: var(--bg-elevated);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  transition: transform 0.15s var(--ease), background 0.15s, border-color 0.15s, box-shadow 0.2s;
  touch-action: manipulation;
}
.icon-btn { width: 38px; padding: 0; color: var(--ink-soft); }
.icon-btn:hover, .btn:hover { background: var(--bg-hover); border-color: var(--p1); box-shadow: 0 0 0 3px var(--p1-wash); }
.icon-btn:active, .btn:active { transform: scale(0.97); }

.btn-primary {
  border: 1px solid transparent;
  background:
    linear-gradient(var(--bg-elevated), var(--bg-elevated)) padding-box,
    linear-gradient(120deg, var(--p1) 0%, var(--p2) 100%) border-box;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: 0.01em;
  position: relative;
}
.btn-primary:hover { box-shadow: 0 0 0 3px var(--p1-wash), 0 0 24px var(--p2-wash); }
.btn-primary.is-syncing { animation: pulse 1.4s var(--ease) infinite; pointer-events: none; opacity: 0.85; }
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--p1-glow); }
  50%      { box-shadow: 0 0 0 6px transparent; }
}

/* ===== Player tabs (1P/2P) ===== */
.player-tabs {
  position: relative;
  display: none;
  padding: 4px;
  margin-bottom: 16px;
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
}
.player-tab {
  position: relative;
  z-index: 1;
  flex: 1;
  height: 40px;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.04em;
  transition: color 0.25s var(--ease);
  touch-action: manipulation;
}
.player-tab.is-active { color: #0b0814; }
.player-indicator {
  position: absolute;
  top: 4px; bottom: 4px;
  left: 4px;
  width: calc(50% - 4px);
  border-radius: var(--r-pill);
  background: linear-gradient(120deg, var(--p1) 0%, var(--p1-soft) 100%);
  box-shadow: 0 4px 16px var(--p1-glow);
  transition: transform 0.4s var(--ease), background 0.4s var(--ease), box-shadow 0.4s var(--ease);
  z-index: 0;
}
.player-tabs[data-active="2"] .player-indicator {
  transform: translateX(100%);
  background: linear-gradient(120deg, var(--p2) 0%, var(--p2-soft) 100%);
  box-shadow: 0 4px 16px var(--p2-glow);
}

/* ===== Filters ===== */
.filters-viewport {
  margin-bottom: 18px;
}
.filters-track {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.filter-card {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 18px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.filter-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  border-radius: var(--r-card) var(--r-card) 0 0;
  opacity: 0.85;
}
.filter-card[data-player="1"]::before { background: linear-gradient(90deg, var(--p1) 0%, transparent 70%); }
.filter-card[data-player="2"]::before { background: linear-gradient(90deg, var(--p2) 0%, transparent 70%); }

.filter-card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.filter-card-tag {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 9px;
  border-radius: var(--r-pill);
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.filter-card[data-player="1"] .filter-card-tag {
  background: var(--p1-wash);
  color: var(--p1-soft);
  box-shadow: inset 0 0 0 1px rgba(255,44,129,0.35);
}
.filter-card[data-player="2"] .filter-card-tag {
  background: var(--p2-wash);
  color: var(--p2-soft);
  box-shadow: inset 0 0 0 1px rgba(34,211,238,0.35);
}
.filter-card-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: var(--ink);
}

.filter-row { margin-bottom: 14px; }
.filter-row:last-child { margin-bottom: 0; }
.filter-row-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 8px;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  max-height: 132px;
  overflow-y: auto;
  padding: 2px;
  scrollbar-width: thin;
  scrollbar-color: var(--bg-hover) transparent;
}
.chip-list::-webkit-scrollbar { width: 6px; }
.chip-list::-webkit-scrollbar-thumb { background: var(--bg-hover); border-radius: 3px; }
.chip {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  background: var(--bg-elevated);
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 12px;
  user-select: none;
  transition: background 0.12s, border-color 0.12s, color 0.12s, box-shadow 0.18s;
  touch-action: manipulation;
}
.chip input { display: none; }
.chip:hover { color: var(--ink); border-color: rgba(255,255,255,0.25); }
.filter-card[data-player="1"] .chip.is-checked {
  background: var(--p1-wash);
  border-color: var(--p1);
  color: #ffe1ee;
  box-shadow: 0 0 0 3px rgba(255,44,129,0.10);
}
.filter-card[data-player="2"] .chip.is-checked {
  background: var(--p2-wash);
  border-color: var(--p2);
  color: #d4f7fc;
  box-shadow: 0 0 0 3px rgba(34,211,238,0.10);
}

.range-row { display: flex; align-items: center; gap: 10px; }
.range-sep {
  flex-shrink: 0;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 12px;
}
.range-input, .level-select {
  flex: 1 1 0;
  min-width: 0;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  background: var(--bg-input);
  color: var(--ink);
  font: inherit;
  font-family: var(--font-mono);
  font-size: 13px;
  text-align: center;
  transition: border-color 0.15s, box-shadow 0.18s;
}
.level-select { font-family: var(--font-body); text-align: left; }
.range-input:focus, .level-select:focus {
  outline: none;
  border-color: var(--p1);
  box-shadow: 0 0 0 3px var(--p1-wash);
}
.filter-card[data-player="2"] .range-input:focus,
.filter-card[data-player="2"] .level-select:focus {
  border-color: var(--p2);
  box-shadow: 0 0 0 3px var(--p2-wash);
}
.range-input::-webkit-outer-spin-button,
.range-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.range-input { -moz-appearance: textfield; }

/* ===== Result list ===== */
.result-card {
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.result-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 16px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}
.result-title-block {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex: 1 1 auto;
  min-width: 0;
}
.result-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.result-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
}
.result-count strong {
  color: var(--p1-soft);
  font-weight: 700;
}

.col-toggle {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.col-toggle-btn {
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--ink-mute);
  cursor: pointer;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: all 0.12s;
  touch-action: manipulation;
}
.col-toggle-btn:hover { color: var(--ink-soft); border-color: var(--line-strong); }
.col-toggle-btn.is-on {
  background: rgba(255,255,255,0.04);
  border-color: var(--line-strong);
  color: var(--ink);
}

/* ===== Table ===== */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-x: contain;
}
.song-table { width: 100%; border-collapse: collapse; }
.song-table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.song-table td {
  padding: 10px 14px;
  font-size: 13px;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  vertical-align: middle;
}
.song-table tbody tr {
  transition: background 0.12s;
}
.song-table tbody tr:hover td {
  background: linear-gradient(90deg, var(--p1-wash), transparent 60%);
}
.song-table tbody tr:last-child td { border-bottom: none; }

/* Cells */
.cover-cell {
  display: block;
  width: 52px;
  height: 52px;
  border-radius: 10px;
  object-fit: cover;
  background: var(--bg-elevated);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06) inset, 0 4px 12px rgba(0,0,0,0.35);
  transition: transform 0.25s var(--ease);
}
.song-table tbody tr:hover .cover-cell { transform: scale(1.04); }

.title-cell {
  display: block;
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: -0.005em;
  color: var(--ink);
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.artist-cell {
  display: block;
  color: var(--ink-soft);
  font-size: 12px;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.bpm-cell, .from-cell, .genre-cell, .type-cell {
  color: var(--ink-soft);
  font-size: 12px;
}
.bpm-cell { font-family: var(--font-mono); color: var(--ink-mute); }
.genre-cell {
  display: inline-block;
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.type-cell {
  display: inline-flex;
  align-items: center;
  height: 20px;
  padding: 0 7px;
  border-radius: var(--r-pill);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  text-transform: uppercase;
}

/* Difficulty stack */
.ds-stack, .level-stack {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
}
.ds-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 22px;
  padding: 0 7px;
  border-radius: var(--r-pill);
  background: rgba(255,255,255,0.03);
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  opacity: 0.95;
}
.ds-pill.basic     { color: var(--d-basic); }
.ds-pill.advanced  { color: var(--d-advanced); }
.ds-pill.expert    { color: var(--d-expert); }
.ds-pill.master    { color: var(--d-master); }
.ds-pill.re_master { color: var(--d-remaster-a); }

.level-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 30px;
  height: 22px;
  padding: 0 8px;
  border-radius: var(--r-pill);
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: #0b0814;
}
.level-badge.basic     { background: var(--d-basic);     box-shadow: 0 0 12px rgba(111,217,111,0.45); }
.level-badge.advanced  { background: var(--d-advanced);  box-shadow: 0 0 12px rgba(255,194,58,0.45); }
.level-badge.expert    { background: var(--d-expert);    box-shadow: 0 0 12px rgba(255,93,93,0.45);  color: #fff; }
.level-badge.master    { background: var(--d-master);    box-shadow: 0 0 14px rgba(176,107,255,0.55); color: #fff; }
.level-badge.re_master {
  background: linear-gradient(120deg, var(--d-remaster-a) 0%, var(--d-remaster-b) 100%);
  box-shadow: 0 0 14px rgba(214,231,255,0.55);
}

/* Empty / loading rows */
.loading-row td, .empty-row td {
  text-align: center;
  padding: 56px 16px;
  color: var(--ink-mute);
  font-size: 13px;
}
.loading-row td { letter-spacing: 0.08em; text-transform: uppercase; font-family: var(--font-display); }
.loading-row td::after {
  content: "";
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  margin-left: 10px;
  vertical-align: middle;
  background: var(--p1);
  box-shadow: 0 0 12px var(--p1-glow);
  animation: blink 1s var(--ease) infinite;
}
@keyframes blink {
  0%, 100% { opacity: 0.3; }
  50%      { opacity: 1; }
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
  gap: 10px;
}
.page-size-select {
  height: 36px;
  padding: 0 32px 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  background: var(--bg-elevated);
  color: var(--ink);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--ink-mute) 50%),
                    linear-gradient(135deg, var(--ink-mute) 50%, transparent 50%);
  background-position: right 14px top 50%, right 9px top 50%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
}
.page-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; }
.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  font: inherit;
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  transition: all 0.12s;
  touch-action: manipulation;
}
.page-btn:hover:not(:disabled) {
  color: var(--ink);
  border-color: var(--line-strong);
  background: var(--bg-elevated);
}
.page-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.page-btn.is-active {
  background: linear-gradient(120deg, var(--p1) 0%, var(--p1-soft) 100%);
  border-color: transparent;
  color: #0b0814;
  font-weight: 700;
  box-shadow: 0 4px 14px var(--p1-glow);
}
.page-ellipsis { color: var(--ink-faint); padding: 0 4px; font-family: var(--font-mono); }
.page-info {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-mute);
}

/* ===== Mobile (≤768px): single-player slide track ===== */
@media (max-width: 768px) {
  .app {
    padding: 14px;
    padding-top: max(14px, env(safe-area-inset-top, 0px));
    padding-left: max(14px, env(safe-area-inset-left, 0px));
    padding-right: max(14px, env(safe-area-inset-right, 0px));
    padding-bottom: max(20px, env(safe-area-inset-bottom, 0px));
  }
  .header { padding-bottom: 14px; margin-bottom: 14px; gap: 10px; }
  .brand-name { font-size: 17px; }
  .brand-glyph { width: 32px; height: 32px; font-size: 16px; }

  .player-tabs { display: flex; }

  .filters-viewport {
    overflow: hidden;
    border-radius: var(--r-card);
  }
  .filters-track {
    grid-template-columns: 1fr 1fr;
    width: 200%;
    transition: transform 0.45s var(--ease);
  }
  .filters-viewport[data-active="2"] .filters-track {
    transform: translateX(-50%);
  }
  .filter-card { border-radius: var(--r-card); }

  .icon-btn, .btn { height: 42px; }
  .icon-btn { width: 42px; }

  .col-toggle-btn { height: 30px; padding: 0 11px; font-size: 11px; }

  .song-table { min-width: 640px; }
  .song-table thead th { padding: 10px 12px; }
  .song-table td { padding: 9px 12px; font-size: 12.5px; }
  .title-cell { max-width: 38vw; }
  .artist-cell { max-width: 30vw; }

  .pagination { padding: 12px 14px; }
}

@media (max-width: 600px) {
  .cover-cell { width: 44px; height: 44px; }
}

@media (max-width: 480px) {
  .app {
    padding: 12px 10px;
    padding-top: max(12px, env(safe-area-inset-top, 0px));
    padding-left: max(10px, env(safe-area-inset-left, 0px));
    padding-right: max(10px, env(safe-area-inset-right, 0px));
  }
  .brand-version { display: none; }
  .result-head { padding: 14px 14px 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.001s !important;
    animation-duration: 0.001s !important;
  }
}