/* Bateria (/bateria): sequenciador de ritmos. Pensada primeiro para o celular,
   na mesma linguagem visual do pad. */
.drum-page {
  --drum-accent: #667eea;
  --drum-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  max-width: 760px;
  margin: 0 auto;
}
.drum-page button { touch-action: manipulation; -webkit-tap-highlight-color: transparent; }

.drum-header { text-align: center; margin: 0.5rem 0 1.25rem; }
.drum-header h1 { font-size: 1.6rem; font-weight: 800; margin: 0 0 0.25rem; }
.drum-header p { color: var(--bs-secondary-color); margin: 0; font-size: 0.95rem; }

.drum-card {
  border: 1px solid var(--bs-border-color);
  border-radius: 1rem;
  background: var(--bs-body-bg);
  padding: 1rem;
  margin-bottom: 1rem;
}
.drum-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--bs-secondary-color);
  margin-bottom: 0.5rem;
}
.drum-label-row { display: flex; justify-content: space-between; align-items: baseline; }
.drum-label-row .drum-value { color: var(--drum-accent); font-variant-numeric: tabular-nums; }
.drum-field { margin-top: 1rem; }

/* Tocando agora */
.drum-player {
  background: var(--drum-gradient);
  color: #fff;
  border: none;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.drum-play-btn {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: none;
  background: #fff;
  color: #5b4bb7;
  font-size: 1.6rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: transform 0.1s;
}
.drum-play-btn:active { transform: scale(0.95); }
.drum-play-btn .fa-play { margin-left: 4px; }
.drum-player.is-playing .drum-play-btn { animation: drum-pulse 1.2s ease-in-out infinite; }
@keyframes drum-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.4); }
  50% { box-shadow: 0 0 0 10px rgba(255, 255, 255, 0); }
}
.drum-player-info { flex: 1; min-width: 0; }
.drum-player-name {
  font-weight: 700;
  font-size: 1.1rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.drum-player-sub { font-size: 0.85rem; opacity: 0.85; }

/* Grade */
.drum-grid-card { padding: 0.75rem; }
.drum-grid-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
  min-height: 36px;
}
.drum-bar-tabs { display: flex; gap: 0.35rem; align-items: center; }
.drum-bar-tabs[hidden] { display: none; }
.drum-bar-tab {
  border: 1px solid var(--bs-border-color);
  border-radius: 2rem;
  background: transparent;
  color: var(--bs-body-color);
  font-weight: 600;
  font-size: 0.82rem;
  min-height: 36px;
  padding: 0 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.drum-bar-tab.active { border-color: var(--drum-accent); color: var(--drum-accent); background: rgba(102, 126, 234, 0.1); }
.drum-bar-tab::after {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--bs-border-color);
}
.drum-bar-tab.is-sounding::after { background: #43e97b; box-shadow: 0 0 6px #43e97b; }
.drum-clear-btn {
  margin-left: auto;
  border: none;
  background: transparent;
  color: var(--bs-secondary-color);
  font-size: 0.85rem;
  font-weight: 600;
  min-height: 36px;
  padding: 0 0.25rem;
}
.drum-clear-btn.confirming { color: #f5576c; }

.drum-grid { display: flex; flex-direction: column; gap: 3px; user-select: none; -webkit-user-select: none; }
.drum-row { display: flex; align-items: stretch; gap: 4px; }
.drum-row-label {
  width: 64px;
  flex-shrink: 0;
  border: none;
  border-radius: 0.5rem;
  background: transparent;
  color: var(--bs-body-color);
  font-size: 0.74rem;
  font-weight: 700;
  text-align: left;
  padding: 0 0.3rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-left: 3px solid var(--row-color, transparent);
}
button.drum-row-label:active { background: var(--bs-tertiary-bg); }
.drum-steps {
  flex: 1;
  min-width: 0;
  display: grid;
  grid-template-columns: repeat(var(--steps, 16), minmax(0, 1fr));
  gap: 2px;
}
.drum-tick {
  text-align: center;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--bs-secondary-color);
  line-height: 1.4;
  border-radius: 4px;
}
.drum-tick.is-now { background: var(--drum-accent); color: #fff; }
.drum-cell {
  position: relative;
  height: 38px;
  border: none;
  border-radius: 5px;
  padding: 0;
  background: rgba(127, 127, 127, 0.14);
  /* Arrastar para os lados pinta a linha; para cima e para baixo rola a página. */
  touch-action: pan-y !important;
}
/* Tempos alternados em tons diferentes: dá para contar o compasso de relance. */
.drum-cell.alt { background: rgba(127, 127, 127, 0.3); }
.drum-cell::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--row-color);
  opacity: 0;
  transition: opacity 0.08s;
}
.drum-cell.lvl-1::before { opacity: 0.5; }
.drum-cell.lvl-2::before { opacity: 1; box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.6); }
.drum-cell.is-now { box-shadow: 0 0 0 2px var(--drum-accent); z-index: 1; }
.drum-cell.is-now.lvl-1::before, .drum-cell.is-now.lvl-2::before { filter: brightness(1.25); }
.drum-cell:focus-visible { outline: 2px solid var(--drum-accent); outline-offset: 1px; }

.drum-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--bs-secondary-color);
}
.drum-legend span { display: inline-flex; align-items: center; gap: 0.35rem; }
.drum-legend i {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: var(--drum-accent);
}
.drum-legend i.soft { opacity: 0.5; }
.drum-legend i.strong { box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.6); }

/* Andamento */
.drum-bpm-row { display: flex; align-items: center; justify-content: center; gap: 0.75rem; }
.drum-bpm-value { min-width: 110px; text-align: center; line-height: 1; }
.drum-bpm-value strong { font-size: 2.6rem; font-weight: 900; color: var(--drum-accent); font-variant-numeric: tabular-nums; }
.drum-bpm-value small { display: block; font-size: 0.7rem; font-weight: 700; letter-spacing: 2px; color: var(--bs-secondary-color); }
.drum-round-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--bs-border-color);
  background: var(--bs-body-bg);
  color: var(--bs-body-color);
  font-size: 1.2rem;
  font-weight: 700;
  flex-shrink: 0;
}
.drum-tap-btn {
  width: 100%;
  min-height: 44px;
  margin-top: 0.5rem;
  border-radius: 2rem;
  border: 2px dashed var(--bs-border-color);
  background: transparent;
  color: var(--bs-secondary-color);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.drum-tap-btn:active { border-color: var(--drum-accent); color: var(--drum-accent); transform: scale(0.98); }
.drum-page input[type="range"] {
  width: 100%;
  height: 32px;
  accent-color: var(--drum-accent);
  touch-action: pan-y;
}

/* Segmentado (compasso, kit, nº de compassos) */
.drum-segment {
  display: grid;
  grid-auto-columns: 1fr;
  grid-auto-flow: column;
  gap: 0.25rem;
  background: var(--bs-tertiary-bg);
  border-radius: 0.85rem;
  padding: 0.25rem;
}
.drum-segment button {
  border: none;
  border-radius: 0.65rem;
  background: transparent;
  color: var(--bs-body-color);
  font-weight: 600;
  font-size: 0.92rem;
  min-height: 44px;
  padding: 0 0.25rem;
}
.drum-segment button.active {
  background: var(--bs-body-bg);
  color: var(--drum-accent);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}
.drum-options { display: grid; grid-template-columns: 1fr; gap: 1rem; }

/* Ritmos prontos: rolagem lateral no celular */
.drum-presets {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  margin: 0 -1rem;
  padding: 0 1rem 0.25rem;
  scrollbar-width: none;
}
.drum-presets::-webkit-scrollbar { display: none; }
.drum-chip {
  flex-shrink: 0;
  border: 1px solid var(--bs-border-color);
  border-radius: 2rem;
  background: var(--bs-body-bg);
  color: var(--bs-body-color);
  font-weight: 600;
  font-size: 0.9rem;
  min-height: 40px;
  padding: 0 0.95rem;
  white-space: nowrap;
}
.drum-chip.active { border-color: var(--drum-accent); background: rgba(102, 126, 234, 0.1); color: var(--drum-accent); }

/* Meus ritmos */
.drum-save-btn {
  width: 100%;
  min-height: 48px;
  border: none;
  border-radius: 0.85rem;
  background: var(--drum-gradient);
  color: #fff;
  font-weight: 700;
}
.drum-save-btn:disabled { opacity: 0.6; }
.drum-status { margin: 0.6rem 0 0; font-size: 0.85rem; text-align: center; color: var(--bs-secondary-color); }
.drum-status.is-error { color: #f5576c; }
.drum-status[hidden] { display: none; }
.drum-login-hint { font-size: 0.9rem; color: var(--bs-secondary-color); margin: 0 0 0.75rem; }
.drum-list { list-style: none; margin: 0.75rem 0 0; padding: 0; }
.drum-list:empty { display: none; }
.drum-list-item { display: flex; align-items: stretch; border-top: 1px solid var(--bs-border-color); }
.drum-list-load {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  color: var(--bs-body-color);
  text-align: left;
  padding: 0.6rem 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.drum-list-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--bs-tertiary-bg);
  color: var(--drum-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.drum-list-item.active .drum-list-icon { background: var(--drum-gradient); color: #fff; }
.drum-list-text { min-width: 0; }
.drum-list-name { display: block; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.drum-list-meta { display: block; font-size: 0.8rem; color: var(--bs-secondary-color); }
.drum-list-del {
  border: none;
  background: transparent;
  color: var(--bs-secondary-color);
  min-width: 44px;
  padding: 0 0.6rem;
  border-radius: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
}
.drum-list-del.confirming { background: #f5576c; color: #fff; margin: 0.5rem 0; }
.drum-empty { font-size: 0.9rem; color: var(--bs-secondary-color); margin: 0.75rem 0 0; }
.drum-empty[hidden] { display: none; }

.drum-hint { text-align: center; font-size: 0.8rem; color: var(--bs-secondary-color); margin-bottom: 1.5rem; }
.drum-hint kbd {
  background: var(--bs-border-color);
  color: var(--bs-body-color);
  padding: 0.15rem 0.4rem;
  border-radius: 0.25rem;
  font-size: 0.75rem;
  font-weight: 600;
}
@media (hover: none) { .drum-hint { display: none; } }

[data-bs-theme="dark"] .drum-page { --drum-gradient: linear-gradient(135deg, #4a3f8a 0%, #5c2d82 100%); --drum-accent: #8f9cf0; }
[data-bs-theme="dark"] .drum-play-btn { color: #4a3f8a; }

@media (min-width: 576px) {
  .drum-grid-card { padding: 1rem; }
  .drum-row-label { width: 84px; font-size: 0.85rem; }
  .drum-cell { height: 40px; border-radius: 6px; }
  .drum-steps { gap: 3px; }
  .drum-presets { flex-wrap: wrap; overflow: visible; margin: 0; padding: 0; }
  .drum-options { grid-template-columns: 1fr 1fr; }
}

/* No celular a grade vai de ponta a ponta: cada pixel vira quadradinho. */
@media (max-width: 575.98px) {
  .drum-grid-card { margin-left: -0.5rem; margin-right: -0.5rem; padding: 0.75rem 0.4rem; }
  .drum-row-label { width: 50px; font-size: 0.66rem; padding: 0 0.2rem; }
  .drum-row { gap: 3px; }
}