/* ==========================================================================
   myDAW — Estilos
   Tema oscuro tipo DAW.
   ========================================================================== */

:root {
  --cell-w: 22px;
  --cell-h: 18px;
  --bg: #0e1114;
  --bg-2: #151a1f;
  --bg-3: #1c222a;
  --border: #262d35;
  --text: #d7dde3;
  --muted: #8a939c;
  --accent: #39d98a;
  --accent-2: #4f9cf7;
  --danger: #e05555;
  --radius: 8px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
}

[hidden] { display: none !important; }

/* ------------------------------ Botones ------------------------------ */
.btn {
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 7px 12px;
  cursor: pointer;
  font-size: 13px;
  transition: background .12s, border-color .12s;
}
.btn:hover { background: #242c34; border-color: #38424c; }
.btn:disabled { opacity: .5; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #06281a; font-weight: 600; }
.btn.accent { background: var(--accent-2); border-color: var(--accent-2); color: #04182c; font-weight: 600; }
.btn.ghost { background: transparent; }
.btn.small { padding: 4px 8px; font-size: 12px; }
.btn.danger { background: #3a1d1d; border-color: #5a2b2b; color: #f2b8b8; }
.btn.danger:hover { background: #4a2323; }

.mini {
  background: var(--bg-3);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 5px;
  width: 22px;
  height: 22px;
  line-height: 1;
  cursor: pointer;
  font-size: 11px;
  font-weight: 700;
}
.mini.active { background: var(--accent); color: #06281a; border-color: var(--accent); }
.mini.danger { color: var(--danger); }

/* ------------------------------ Auth ------------------------------ */
.auth-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(1200px 600px at 50% -10%, #16242b 0%, var(--bg) 55%);
  padding: 20px;
}
.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 30px;
  text-align: center;
}
.brand-logo { font-size: 40px; }
.auth-card h1 { margin: 6px 0 0; letter-spacing: 1px; }
.tagline { color: var(--muted); margin: 6px 0 20px; font-size: 13px; }
.auth-tabs { display: flex; gap: 6px; margin-bottom: 18px; }
.auth-tabs button {
  flex: 1;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px;
  border-radius: var(--radius);
  cursor: pointer;
}
.auth-tabs button.active { background: var(--accent); border-color: var(--accent); color: #06281a; font-weight: 600; }
#auth-form { display: flex; flex-direction: column; gap: 10px; }
#auth-form input {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 10px 12px;
  font-size: 14px;
}
#auth-form input:focus { outline: none; border-color: var(--accent); }
.error { color: var(--danger); min-height: 16px; font-size: 13px; }

/* ------------------------------ Topbar ------------------------------ */
#topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.brand { font-size: 16px; }
.project-controls { display: flex; align-items: center; gap: 6px; flex: 1; flex-wrap: wrap; }
#project-name {
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 7px 10px;
  min-width: 160px;
}
.user-controls { display: flex; align-items: center; gap: 8px; }
.user-name { color: var(--muted); font-size: 13px; }

/* ------------------------------ Transport ------------------------------ */
#transport {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 16px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.btn.play { width: 40px; font-size: 16px; }
.tgl, .num { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 13px; }
.tgl input { accent-color: var(--accent); }
.num input {
  width: 64px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 5px 8px;
}

/* ------------------------------ Layout ------------------------------ */
#main {
  display: grid;
  grid-template-columns: 320px 1fr;
  height: calc(100vh - 110px);
  min-height: 420px;
}

/* ------------------------------ Pistas ------------------------------ */
#track-list {
  border-right: 1px solid var(--border);
  background: var(--bg-2);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
#track-list-header {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  position: sticky;
  top: 0;
  background: var(--bg-2);
  z-index: 2;
}
.add-btns { display: flex; gap: 4px; }

.track-strip {
  border-bottom: 1px solid var(--border);
  padding: 8px 10px;
  cursor: pointer;
  transition: background .1s;
}
.track-strip:hover { background: var(--bg-3); }
.track-strip.selected { background: #1b2621; box-shadow: inset 3px 0 0 var(--accent); }
.track-header { display: flex; align-items: center; gap: 6px; margin-bottom: 6px; }
.track-type { font-size: 15px; }
.track-name {
  flex: 1;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text);
  font-weight: 600;
  padding: 2px 4px;
  border-radius: 4px;
  min-width: 0;
}
.track-name:hover { border-color: var(--border); }
.track-name:focus { outline: none; border-color: var(--accent); background: var(--bg-3); }
.track-controls { display: flex; flex-direction: column; gap: 4px; }
.slider { display: flex; align-items: center; gap: 8px; }
.slider-label { width: 34px; color: var(--muted); font-size: 11px; flex-shrink: 0; }
.slider input[type="range"] { flex: 1; accent-color: var(--accent); height: 18px; }
.slider select { flex: 1; background: var(--bg-3); color: var(--text); border: 1px solid var(--border); border-radius: 5px; padding: 2px 4px; }

/* ------------------------------ Editor ------------------------------ */
#editor-wrap { display: flex; flex-direction: column; overflow: hidden; }
#editor-toolbar {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-2);
  color: var(--muted);
  font-size: 13px;
}
#editor-toolbar select { background: var(--bg-3); color: var(--text); border: 1px solid var(--border); border-radius: 5px; padding: 3px 6px; }
#fx-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
  flex-wrap: wrap;
}
#fx-bar:empty { display: none; }
.fx-title { font-weight: 700; color: var(--accent); font-size: 12px; letter-spacing: 1px; }
.fx-group { display: flex; align-items: center; gap: 5px; color: var(--muted); font-size: 12px; }
.fx-group input[type="checkbox"] { accent-color: var(--accent); }
#fx-bar select { background: var(--bg-3); color: var(--text); border: 1px solid var(--border); border-radius: 5px; padding: 3px 6px; font-size: 12px; }
.fx-slider { display: flex; align-items: center; gap: 6px; }
.fx-label { color: var(--muted); font-size: 11px; min-width: 26px; }
.fx-slider input[type="range"] { width: 72px; accent-color: var(--accent); }
#btn-midi.active { background: var(--accent); border-color: var(--accent); color: #06281a; font-weight: 600; }
#editor { flex: 1; overflow: auto; background: var(--bg); }
.editor-empty { color: var(--muted); display: flex; align-items: center; justify-content: center; height: 100%; }

.grid-wrap { display: flex; min-width: max-content; }
.piano-labels { position: sticky; left: 0; z-index: 3; background: var(--bg-2); border-right: 1px solid var(--border); flex-shrink: 0; }
.piano-label {
  height: var(--cell-h);
  line-height: var(--cell-h);
  padding-right: 8px;
  font-size: 10px;
  color: var(--muted);
  text-align: right;
  border-bottom: 1px solid #181d23;
  background: var(--bg-2);
}
.piano-label.black { background: #191f26; }
.piano-label.drum-label { font-weight: 700; color: var(--text); padding: 0 8px; }

.grid { position: relative; display: grid; }
.grid-col {
  position: absolute;
  top: 0;
  bottom: 0;
  width: var(--cell-w);
  pointer-events: none;
  background: transparent;
}
.grid-col.beat { background: rgba(255, 255, 255, 0.035); }
.grid-col.playhead { background: rgba(57, 217, 138, 0.22); z-index: 1; }

.cell {
  background: #14181d;
  border: 1px solid #1c222a;
  cursor: pointer;
  border-radius: 2px;
}
.cell:hover { background: #1d252d; }
.synth-cell.note-c { background: #171c22; }
.cell.on { background: var(--accent); border-color: #1fb56e; }
.cell.start { background: #2fe28f; }
.drum-cell.on { background: var(--accent-2); border-color: #3a7fd6; }

/* ------------------------------ Audio ------------------------------ */
.audio-panel { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.audio-actions { display: flex; gap: 8px; }
.audio-info { color: var(--muted); font-size: 13px; }
.waveform { width: 100%; max-width: 900px; border: 1px solid var(--border); border-radius: var(--radius); }

/* ------------------------------ Modal ------------------------------ */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 20px;
}
.modal-card {
  width: 100%;
  max-width: 560px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}
#project-list { overflow-y: auto; padding: 8px; }
.project-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border-bottom: 1px solid var(--border);
}
.project-name { flex: 1; font-weight: 600; }
.project-meta { color: var(--muted); font-size: 12px; }
.project-empty { color: var(--muted); text-align: center; padding: 24px; }

/* ------------------------------ Toast ------------------------------ */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #1d2b24;
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
  z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { background: #3a1d1d; border-color: var(--danger); }

/* ------------------------------ Responsive ------------------------------ */
@media (max-width: 820px) {
  #main { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  #track-list { border-right: none; border-bottom: 1px solid var(--border); max-height: 40vh; }
}