/* ════════════════════════════════════════════
   サクラ MIDI プレイヤー — スタイルシート
   ダークモード / グラスモーフィズム / モダンUI
   ════════════════════════════════════════════ */

/* ── デザイントークン ─────────────────────── */
:root {
  --bg-0:      #07071a;
  --bg-1:      #0f0f2a;
  --bg-2:      #14142e;
  --bg-glass:  rgba(255,255,255,0.04);
  --border:    rgba(255,255,255,0.08);
  --border-hi: rgba(255,255,255,0.18);

  --text:      #e4e9f7;
  --text-dim:  #7880a0;
  --text-xs:   #4a5070;

  --accent:    #6366f1;
  --accent-2:  #818cf8;
  --accent-3:  #a78bfa;
  --glow:      rgba(99,102,241,0.35);
  --glow-sm:   rgba(99,102,241,0.2);

  --pill-r:    9999px;
  --card-r:    12px;
  --btn-r:     8px;

  --ctrl-h:    52px;
  --header-h:  48px;

  --transition: 0.18s ease;
}

/* ── リセット ────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 13px;
  background: var(--bg-0);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

/* ── アプリレイアウト ─────────────────────── */
.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ── ヘッダー ────────────────────────────── */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 18px;
  background: rgba(12,12,30,0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
  flex-shrink: 0;
  z-index: 10;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-icon {
  font-size: 1.3rem;
  display: inline-block;
  animation: bloom 4s ease-in-out infinite;
  -webkit-text-fill-color: initial;
}
@keyframes bloom {
  0%,100% { transform: rotate(-6deg) scale(1); }
  50%      { transform: rotate( 6deg) scale(1.15); }
}

.logo h1, .logo a {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  background: linear-gradient(120deg, var(--accent-2), var(--accent-3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.7rem;
  color: var(--text-dim);
  background: var(--bg-glass);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: var(--pill-r);
  font-family: 'Inter', monospace;
  transition: color var(--transition);
}
.status-badge.ok  { color: #6ee7b7; }
.status-badge.err { color: #f87171; }

/* ── コントロールパネル ───────────────────── */
.controls-panel {
  display: flex;
  align-items: center;
  gap: 12px;
  height: var(--ctrl-h);
  padding: 0 14px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
  overflow: hidden;
}

.ctrl-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ── ファイルボタン ──────────────────────── */
.file-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: var(--btn-r);
  background: var(--bg-glass);
  cursor: pointer;
  white-space: nowrap;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
  font-size: 0.82rem;
  color: var(--text);
}
.file-btn:hover {
  border-color: var(--accent);
  background: rgba(99,102,241,0.08);
  box-shadow: 0 0 14px var(--glow-sm);
}
.btn-icon { font-size: 1rem; line-height: 1; }

/* ── トランスポートボタン ─────────────────── */
.transport { gap: 8px; }

.transport-btn {
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--bg-glass);
  color: var(--text);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
  flex-shrink: 0;
}
.transport-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: rgba(99,102,241,0.12);
  transform: scale(1.06);
}
.transport-btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  border-color: transparent;
  box-shadow: 0 0 18px var(--glow);
}
.transport-btn.primary:hover:not(:disabled) {
  box-shadow: 0 0 28px var(--glow);
  transform: scale(1.1);
}
.transport-btn:disabled { opacity: 0.35; cursor: not-allowed; }

/* ── シークバー ──────────────────────────── */
.seek-group { flex: 1; min-width: 200px; }

.time-display {
  font-family: 'Inter', monospace;
  font-size: 0.72rem;
  color: var(--text-dim);
  min-width: 32px;
  text-align: center;
  letter-spacing: 0.02em;
}

.seek-track {
  flex: 1;
  position: relative;
  height: 18px;
  display: flex;
  align-items: center;
}
.seek-bar {
  position: absolute;
  inset: 0;
  width: 100%;
  -webkit-appearance: none;
  background: transparent;
  cursor: pointer;
  z-index: 2;
}
.seek-fill {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-3));
  pointer-events: none;
  z-index: 1;
  width: 0%;
  transition: width 0.08s linear;
}
/* Webkit track */
.seek-bar::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: rgba(255,255,255,0.08);
}
.seek-bar::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent-3);
  box-shadow: 0 0 8px var(--glow);
  cursor: pointer;
  margin-top: -5px;
  transition: transform 0.1s;
}
.seek-bar::-webkit-slider-thumb:hover { transform: scale(1.3); }
/* Firefox */
.seek-bar::-moz-range-track {
  height: 4px; border-radius: 2px; background: rgba(255,255,255,0.08); border: none;
}
.seek-bar::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent-3); border: none;
  box-shadow: 0 0 8px var(--glow);
}
.seek-bar::-moz-range-progress {
  height: 4px; border-radius: 2px; background: var(--accent);
}

/* ── ズーム / 音量グループ ───────────────── */
.zoom-group { gap: 6px; }
.ctrl-label { color: var(--text-dim); font-size: 0.9rem; }
.zoom-label { font-size: 0.68rem; color: var(--text-xs); min-width: 48px; text-align: center; }

.volume-slider {
  width: 72px;
  -webkit-appearance: none;
  background: transparent;
  cursor: pointer;
}
.volume-slider::-webkit-slider-runnable-track {
  height: 3px; border-radius: 2px; background: rgba(255,255,255,0.08);
}
.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent-3); margin-top: -4.5px;
}

.icon-btn {
  min-width: 28px; height: 28px;
  padding: 0 6px;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.85rem;
  display: flex; align-items: center; justify-content: center;
  transition: border-color var(--transition), color var(--transition);
}
.icon-btn:hover { border-color: var(--accent); color: var(--text); }

/* ── MML エディタ ────────────────────────── */
.mml-editor-panel {
  display: flex;
  height: 150px;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border);
  padding: 10px;
  gap: 10px;
}
#mml-input {
  flex: 1;
  background: var(--bg-0);
  border: 1px solid var(--border);
  border-radius: var(--card-r);
  color: var(--text);
  padding: 12px;
  font-family: 'Inter', monospace;
  font-size: 0.9rem;
  resize: none;
  outline: none;
  transition: border-color var(--transition);
}
#mml-input:focus {
  border-color: var(--accent);
}
.mml-controls {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.mml-log {
  width: 30%;
  background: rgba(20, 20, 46, 0.7);
  border: 1px solid var(--border);
  border-radius: var(--card-r);
  color: #ff8e8e;
  padding: 12px;
  font-family: 'Inter', monospace;
  font-size: 0.8rem;
  resize: none;
  outline: none;
  white-space: pre-wrap;
}
.mml-log.success {
  color: #6ee7b7;
}

/* ── ピアノロール ────────────────────────── */
.roll-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--bg-0);
}
#piano-roll {
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
  outline: none;
}

/* ── ドロップオーバーレイ ────────────────── */
.drop-overlay {
  position: absolute;
  inset: 0;
  background: rgba(7,7,26,0.88);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  z-index: 20;
}
.drop-overlay.active { opacity: 1; pointer-events: all; }
.drop-message {
  text-align: center;
  border: 2px dashed var(--accent);
  border-radius: var(--card-r);
  padding: 40px 60px;
  animation: pulse-border 1.5s ease-in-out infinite;
}
.drop-message span { font-size: 3rem; display: block; margin-bottom: 12px; }
.drop-message p { font-size: 1.1rem; color: var(--accent-2); font-weight: 500; }
@keyframes pulse-border {
  0%,100% { border-color: var(--accent);  box-shadow: 0 0 18px var(--glow); }
  50%      { border-color: var(--accent-3); box-shadow: 0 0 30px var(--glow); }
}

/* ── ローディングスピナー (クラス付与時) ─── */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(7,7,26,0.82);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 30;
  gap: 16px;
}
.spinner {
  width: 44px; height: 44px;
  border: 3px solid rgba(99,102,241,0.25);
  border-top-color: var(--accent-3);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
.loading-text { color: var(--text-dim); font-size: 0.85rem; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── スクロールバー (Webkit) ─────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(99,102,241,0.3); border-radius: 3px; }