/* PulseGrid — style.css
 * Dark studio theme. System font stack only — works fully offline.
 */

:root {
  --bg: #0a0c10;
  --panel: #10141c;
  --panel-2: #151a24;
  --line: #232b3a;
  --text: #e7ecf5;
  --muted: #8a94a8;
  --accent: #22d3ee;
  --accent-2: #f43f5e;
  --radius: 10px;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  overscroll-behavior: none;   /* pull-to-refresh has no business in a drum machine */
  margin: 0;
  padding: 0;
  background:
    radial-gradient(1100px 500px at 50% -120px, rgba(34, 60, 120, 0.28), transparent 70%),
    var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  min-height: 100vh;
}

/* ---------- top bar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px 20px;
  padding: 10px 18px;
  background: rgba(13, 16, 23, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

/* i18n layout stability — stop EN<->ZH text-length changes from nudging the toolbar */
button.mini, .btn-play { white-space: nowrap; }
#btnLang { min-width: 64px; text-align: center; }
#btnCopy { min-width: 58px; text-align: center; }
#btnClear { min-width: 58px; text-align: center; }
#btnReset { min-width: 70px; text-align: center; }

.brand { display: flex; align-items: center; gap: 10px; margin-right: 6px; }
.brand-name { font-size: 18px; font-weight: 700; letter-spacing: 0.4px; }
.brand-tag {
  font-size: 11px; color: var(--muted); text-transform: uppercase;
  letter-spacing: 1.6px; margin-left: 2px;
}

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

.btn-play {
  display: inline-flex; align-items: center; gap: 8px;
  min-width: 96px; justify-content: center;
  padding: 9px 16px;
  font-size: 14px; font-weight: 600; color: #06121a;
  background: linear-gradient(135deg, #22d3ee, #6366f1);
  border: none; border-radius: 999px;
  cursor: pointer;
  transition: transform 0.08s ease, box-shadow 0.2s ease;
}
.btn-play:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(56, 189, 248, 0.35); }
.btn-play:active { transform: translateY(0); }
.btn-play.playing {
  background: linear-gradient(135deg, #f43f5e, #f97316);
  color: #fff;
  animation: pulse 1.1s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(244, 63, 94, 0.45); }
  50%      { box-shadow: 0 0 0 9px rgba(244, 63, 94, 0); }
}

.btn-stop {
  width: 38px; height: 38px;
  font-size: 13px; color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 999px;
  cursor: pointer;
}
.btn-stop:hover { background: #1c2330; }

/* ---------- generic controls ---------- */

.ctrl { display: flex; align-items: center; gap: 8px; }
.ctrl label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 1px; }

input[type="number"] {
  width: 62px; padding: 6px 8px;
  font: 600 14px var(--mono);
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 8px;
  text-align: center;
}
input[type="number"]:focus { outline: 1px solid var(--accent); }

select {
  padding: 6px 10px;
  color: var(--text); background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 8px;
  cursor: pointer;
}

output { font: 12px var(--mono); color: var(--muted); min-width: 38px; }

input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 110px; height: 4px;
  background: linear-gradient(90deg, var(--accent) 0%, #3b4a63 0%);
  border-radius: 2px; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 14px; height: 14px; border-radius: 50%;
  background: #e7ecf5;
  border: 2px solid var(--accent);
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.5);
}
input[type="range"]::-moz-range-thumb {
  width: 12px; height: 12px; border-radius: 50%;
  background: #e7ecf5; border: 2px solid var(--accent);
}
input[type="range"]::-moz-range-track {
  height: 4px; border-radius: 2px; background: #3b4a63;
}
input[type="range"]::-moz-range-progress {
  height: 4px; border-radius: 2px; background: var(--accent);
}

button { touch-action: manipulation; }

select.rate-sel { padding: 5px 6px; width: auto; }

button.mini {
  padding: 5px 10px;
  font-size: 11px; font-weight: 600; letter-spacing: 0.5px;
  color: var(--muted);
  background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 7px;
  cursor: pointer;
  transition: all 0.12s ease;
}
button.mini:hover { color: var(--text); border-color: #35415a; }
button.mini:disabled { opacity: 0.5; cursor: wait; }
button.mini.active { color: #06121a; background: var(--accent); border-color: var(--accent); }
button.mini.armed { color: #fff; background: var(--accent-2); border-color: var(--accent-2); }

button.mini.tapped { animation: tappulse 0.3s ease-out; }
@keyframes tappulse {
  0% { background: var(--accent); color: #06121a; }
  100% { background: var(--panel-2); color: var(--muted); }
}

.patterns { display: flex; gap: 6px; }
.patterns .pat { position: relative; }
.patterns .pat.has::after {
  content: '';
  position: absolute; right: 3px; bottom: 3px;
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--accent); opacity: 0.85;
}
.patterns .pat.active {
  color: #fff; background: linear-gradient(135deg, #6366f1, #a855f7);
  border-color: transparent;
  box-shadow: 0 0 12px rgba(129, 140, 248, 0.45);
}

/* ---------- visualizer ---------- */

.vizwrap { padding: 12px 18px 0; }
#viz {
  display: block;
  width: 100%; height: 110px;
  background: #0b0e14;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

/* ---------- main panels ---------- */

main { padding: 14px 18px 30px; display: flex; flex-direction: column; gap: 16px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px 16px;
  overflow-x: auto;
}

h2 {
  margin: 0 0 12px;
  font-size: 12px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1.8px;
  color: var(--muted);
}
h2 .hint { font-weight: 400; text-transform: none; letter-spacing: 0.2px; opacity: 0.75; }

/* ---------- drum lanes ---------- */

.lane {
  display: flex; align-items: center; gap: 10px;
  padding: 4px 0;
}

.lane-ctl {
  display: grid;
  grid-template-columns: repeat(2, 26px) 10px 74px 64px;
  align-items: center; gap: 5px;
  flex: 0 0 220px;
}
.lane-ctl .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--c); box-shadow: 0 0 8px var(--c); }
.lane-name { font-size: 12.5px; font-weight: 600; white-space: nowrap; }
.lane-vol { width: 64px !important; }

.lane-grid {
  display: grid;
  grid-template-columns: repeat(16, minmax(30px, 1fr));
  gap: 5px;
  flex: 1 1 auto;
  min-width: 560px;
}

.step {
  position: relative;
  height: 34px;
  border-radius: 7px;
  border: 1px solid #1d2534;
  background: #12182366;
  cursor: pointer;
  transition: background 0.07s ease, box-shadow 0.07s ease, transform 0.05s ease;
  -webkit-user-select: none; user-select: none;
  touch-action: none;
}
.step.beat-1 { border-color: #26304433; }
.step:hover { background: #1b243499; }
.step.col-hi, .roll-cell.col-hi { background: #1c2635; }
.step.on.col-hi, .roll-cell.on.col-hi { filter: brightness(1.18); }
.step.on {
  /* fallbacks first: browsers without color-mix() keep a solid lit cell */
  background: var(--c);
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.18), inset 0 -6px 10px rgba(0, 0, 0, 0.25);
  background: linear-gradient(180deg, color-mix(in srgb, var(--c) 88%, white 12%), var(--c));
  border-color: transparent;
  box-shadow: 0 0 12px color-mix(in srgb, var(--c) 55%, transparent), inset 0 -6px 10px rgba(0, 0, 0, 0.25);
}
.step.ph { outline: 2px solid rgba(235, 244, 255, 0.85); outline-offset: 0.5px; }
.step.on.ph { filter: brightness(1.45); }
.step.acc { filter: brightness(1.32) saturate(1.2); }
.step.acc::after {
  content: '';
  position: absolute; top: 3px; right: 3px;
  width: 5px; height: 5px; border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 5px rgba(255, 255, 255, 0.9);
}

/* ---------- REC + help overlay ---------- */

.btn-rec {
  width: 38px; height: 38px;
  font-size: 15px; color: var(--muted);
  background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 999px;
  cursor: pointer;
  line-height: 1;
}
.btn-rec:hover { color: var(--text); border-color: #35415a; }
.btn-rec.active {
  color: #fff;
  background: linear-gradient(135deg, #f43f5e, #fb7185);
  border-color: transparent;
  animation: pulse 1.1s ease-in-out infinite;
}

.btn-click {
  width: auto; height: 38px; padding: 0 10px;
  font-size: 11px; font-weight: 700; letter-spacing: 1px;
  color: var(--muted);
  background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 999px;
  cursor: pointer;
}
.btn-click:hover { color: var(--text); border-color: #35415a; }
.btn-click.active {
  color: #06121a;
  background: linear-gradient(135deg, #a3e635, #22d3ee);
  border-color: transparent;
}

.song-chip.insert-before { box-shadow: -5px 0 0 var(--accent); }

.step.rec-flash { animation: recflash 0.35s ease-out; }
@keyframes recflash {
  0% { box-shadow: 0 0 0 0 rgba(244, 63, 94, 0.9); }
  100% { box-shadow: 0 0 0 14px rgba(244, 63, 94, 0); }
}

#dropzone {
  position: fixed; inset: 0;
  display: none;
  align-items: center; justify-content: center;
  background: rgba(8, 22, 30, 0.72);
  z-index: 70;
  pointer-events: none;
}
#dropzone.open { display: flex; }
.drop-hint {
  padding: 26px 40px;
  font-size: 16px; font-weight: 600;
  color: var(--text);
  background: var(--panel);
  border: 2px dashed var(--accent);
  border-radius: 14px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}

#help {
  position: fixed; inset: 0;
  display: none;
  align-items: center; justify-content: center;
  background: rgba(5, 8, 14, 0.7);
  backdrop-filter: blur(4px);
  z-index: 60;
}
#help.open { display: flex; }
.help-panel {
  width: min(420px, calc(100vw - 40px));
  background: var(--panel);
  border: 1px solid #33405a;
  border-radius: 12px;
  padding: 16px 18px 18px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}
.help-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.help-head h3 { margin: 0; font-size: 15px; }
.help-table { width: 100%; border-collapse: collapse; }
.help-table td { padding: 6px 4px; font-size: 13px; color: var(--muted); border-bottom: 1px solid #1b2330; }
.help-table td:first-child { width: 110px; }
.help-tip { margin: 12px 0 0; font-size: 12.5px; color: var(--muted); }

/* ---------- 32-step patterns ---------- */

.app-32 .lane-grid { grid-template-columns: repeat(32, minmax(20px, 1fr)); }
.app-32 .step[data-s="16"],
.app-32 .roll-cell[data-s="16"] {
  margin-left: 7px;
  border-left: 2px solid #33415a;
}

/* ---------- generator ---------- */

.gen-row { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 24px; padding: 2px; }
.gen-row label {
  display: flex; align-items: center; gap: 10px;
  color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 1px;
}
.btn-gen {
  padding: 8px 18px;
  font-size: 13px; font-weight: 700; color: #06121a;
  background: linear-gradient(135deg, #a3e635, #22d3ee);
  border: none; border-radius: 8px;
  cursor: pointer;
  transition: transform 0.08s ease, box-shadow 0.15s ease;
}
.btn-gen:hover { transform: translateY(-1px); box-shadow: 0 4px 14px rgba(163, 230, 53, 0.35); }
.btn-gen:active { transform: translateY(0); }

/* ---------- vibe prompt generator ---------- */

.vibe-row {
  display: flex; align-items: center; flex-wrap: wrap; gap: 10px 14px;
  margin-top: 12px; padding-top: 12px;
  border-top: 1px dashed var(--line);
}
.vibe-spark { font-size: 16px; filter: drop-shadow(0 0 6px rgba(129, 140, 248, 0.6)); }
.vibe-input {
  flex: 1 1 280px; min-width: 200px;
  padding: 9px 14px;
  font-size: 13.5px; color: var(--text);
  background: #0c1018;
  border: 1px solid #2a3550; border-radius: 999px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.vibe-input::placeholder { color: #59637a; }
.vibe-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.18);
}
.vibe-caps { display: flex; flex-wrap: wrap; gap: 6px; }
.vibe-cap {
  padding: 5px 12px;
  font-size: 11.5px; font-weight: 600; letter-spacing: 0.3px;
  color: #c3cce0;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.18), rgba(34, 211, 238, 0.12));
  border: 1px solid #2a3550; border-radius: 999px;
  cursor: pointer;
  transition: all 0.12s ease;
}
.vibe-cap:hover {
  color: #fff; border-color: var(--accent);
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.35);
  transform: translateY(-1px);
}
.vibe-status {
  flex-basis: 100%;
  font: 12px var(--mono);
  color: var(--accent);
  min-height: 0; max-height: 0; overflow: hidden;
  opacity: 0; transition: opacity 0.2s ease, max-height 0.2s ease;
}
.vibe-status.show { min-height: 16px; max-height: 24px; opacity: 1; }

/* ---------- visualizer controls + performance mode ---------- */

.vizwrap { position: relative; }
.viz-ctrls {
  position: absolute; top: 20px; right: 28px;
  display: flex; gap: 6px;
  opacity: 0.35; transition: opacity 0.18s ease;
}
.vizwrap:hover .viz-ctrls, .viz-ctrls:focus-within { opacity: 1; }
.viz-btn {
  width: 30px; height: 30px;
  font-size: 14px; line-height: 1;
  color: var(--muted);
  background: rgba(16, 20, 28, 0.8);
  border: 1px solid var(--line); border-radius: 8px;
  cursor: pointer;
  transition: all 0.12s ease;
}
.viz-btn:hover { color: var(--text); border-color: #35415a; }
.viz-btn.active {
  color: #06121a; background: var(--accent); border-color: var(--accent);
  box-shadow: 0 0 10px rgba(34, 211, 238, 0.5);
}
#vizPerf.active { color: #06121a; background: linear-gradient(135deg, #a3e635, #22d3ee); border-color: transparent; }

body.viz-perf { overflow: hidden; background: #05070b; }
body.viz-perf #viz {
  position: fixed; inset: 0;
  width: 100vw; height: 100vh;
  z-index: 80; border: none; border-radius: 0;
  background: #05070b;
}
body.viz-perf .viz-ctrls { position: fixed; top: 18px; right: 22px; z-index: 81; opacity: 1; }
body.viz-perf main, body.viz-perf .topbar, body.viz-perf footer { filter: blur(2px); opacity: 0.25; }

/* ---------- song mode ---------- */

.song-row { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; padding: 2px; }
.song-chain { display: flex; flex-wrap: wrap; gap: 6px; }
.song-chip {
  min-width: 34px; height: 30px; padding: 0 8px;
  touch-action: none;
  font-size: 13px; font-weight: 700;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 7px;
  cursor: pointer;
  transition: border-color 0.1s ease;
}
.song-chip:hover { border-color: #35415a; }
.song-chip.dragging { opacity: 0.45; }
.song-chip.drag-over { outline: 2px dashed var(--accent); outline-offset: 1px; }
.song-chip.playing {
  outline: 2px solid rgba(235, 244, 255, 0.85);
  background: linear-gradient(135deg, #6366f1, #a855f7);
  border-color: transparent;
}
.song-empty { color: var(--muted); font-size: 12px; }
.song-pos {
  font: 12px var(--mono);
  color: var(--muted);
  min-width: 70px;
}
.song-pos:empty { min-width: 0; }

/* ---------- sound design ---------- */

.sound-row { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 22px; padding: 2px; }
.sound-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.sound-chip {
  padding: 5px 11px;
  font-size: 12px; font-weight: 600;
  color: var(--muted);
  background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 999px;
  cursor: pointer;
  transition: all 0.1s ease;
}
.sound-chip:hover { color: var(--text); border-color: var(--c); }
.sound-chip.active {
  color: #06121a;
  background: var(--c);
  border-color: transparent;
  box-shadow: 0 0 10px rgba(129, 140, 248, 0.35);
  box-shadow: 0 0 10px color-mix(in srgb, var(--c) 55%, transparent);
}
.sound-ctrl { display: flex; flex-direction: column; gap: 7px; }
.sound-ctrl label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 1px; }
.sound-ctrl label output { color: var(--text); font-family: var(--mono); }

/* ---------- bass roll ---------- */

.bass-bar { padding: 2px 0 8px; }
.lead-bar .lane-ctl { grid-template-columns: repeat(3, 26px) 10px 40px 48px; }

.roll-row {
  display: flex; align-items: center; gap: 8px;
  padding: 1.5px 0;
}
.roll-row.sharp .roll-label { color: #5b6577; }
.roll-label {
  flex: 0 0 220px;
  font: 11px var(--mono);
  color: var(--muted);
  text-align: right; padding-right: 6px;
}
.roll-row .lane-grid { min-width: 560px; }

.roll-cell {
  height: 20px;
  border-radius: 5px;
  border: 1px solid #1d2534;
  background: #12182366;
  cursor: pointer;
  transition: background 0.07s ease, box-shadow 0.07s ease;
  -webkit-user-select: none; user-select: none;
  /* without this, the phone's double-tap zoom swallows the 3-state click */
  touch-action: manipulation;
}

.step:focus-visible,
.roll-cell:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.roll-cell:hover { background: #1b243499; }
.roll-cell.on {
  background: linear-gradient(180deg, #67e8f9, #22d3ee);
  border-color: transparent;
  box-shadow: 0 0 10px rgba(34, 211, 238, 0.5);
}
.roll-cell.acc {
  background: linear-gradient(180deg, #fb7185, #f43f5e);
  box-shadow: 0 0 14px rgba(244, 63, 94, 0.65);
}
.roll-cell.ph { outline: 1.5px solid rgba(235, 244, 255, 0.7); }
.roll-cell.lead-cell.acc {
  background: linear-gradient(180deg, #fde68a, #f59e0b);
  box-shadow: 0 0 14px rgba(245, 158, 11, 0.65);
}

/* ---------- FX rack ---------- */

.fx-rack { display: flex; flex-wrap: wrap; gap: 26px 48px; padding: 4px 2px; }
.fx-unit { display: flex; flex-direction: column; gap: 8px; }
.fx-unit label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 1px; }
.fx-unit label output { color: var(--text); }
.fx-unit input[type="range"] { width: 200px; }

/* ---------- footer / toast ---------- */

footer {
  display: flex; flex-wrap: wrap; gap: 10px 28px;
  padding: 8px 18px 26px;
  color: var(--muted); font-size: 12px;
}
footer a { color: var(--muted); }
kbd {
  font: 11px var(--mono);
  background: var(--panel-2);
  border: 1px solid var(--line); border-bottom-width: 2px;
  border-radius: 4px; padding: 1px 5px;
}

#toast {
  position: fixed; left: 50%; bottom: 28px;
  transform: translateX(-50%) translateY(16px);
  padding: 10px 18px;
  font-size: 13px;
  background: #1b2230f2;
  border: 1px solid #33405a;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  opacity: 0; pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
  z-index: 50;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .lane-ctl { flex-basis: 190px; grid-template-columns: repeat(2, 24px) 8px 64px 48px; }
  .roll-label { flex-basis: 190px; }
  main { padding: 12px 10px 26px; }
  .topbar { padding: 10px 12px; }
  .vizwrap { padding: 10px 10px 0; }
}

/* ---------- phone layout: lanes stack, grids go full width ---------- */

@media (max-width: 720px) {
  .topbar { gap: 8px 12px; padding: 8px 10px; }
  /* the utility cluster (lang / undo / copy / clear / reset / export) is a
     single nowrap flex row ~790px wide; let it wrap instead of widening <body> */
  .ctrl.actions { flex-wrap: wrap; }
  .brand-tag { display: none; }
  .btn-play { min-width: 84px; padding: 8px 12px; }
  .ctrl input[type="range"] { width: 84px; }
  .vizwrap { padding: 8px 8px 0; }
  #viz { height: 78px; }
  main { padding: 10px 8px 22px; gap: 10px; }
  .panel { padding: 10px 10px 12px; border-radius: 8px; }
  .gen-row, .sound-row, .song-row { gap: 8px 14px; }

  .lane { flex-direction: column; align-items: stretch; gap: 5px; padding: 6px 0; }
  .lane-ctl { flex-basis: auto; grid-template-columns: repeat(2, 30px) 10px 1fr 76px; }
  .lane-vol { width: 100% !important; }
  .lane-grid { min-width: 0; grid-template-columns: repeat(16, minmax(18px, 1fr)); gap: 3px; }
  /* .roll-row .lane-grid sets 560px later in the file; without this the piano
     roll widens <body> and every panel overflows on a phone. */
  .roll-row .lane-grid { min-width: 0; }
  .step { height: 30px; border-radius: 5px; }

  .roll-row { gap: 4px; }
  .roll-label { flex-basis: auto; width: 30px; text-align: left; padding: 0; align-self: center; }
  .roll-cell { height: 17px; border-radius: 4px; }

  .fx-unit input[type="range"] { width: 100%; }
  .fx-rack { gap: 14px 22px; }
  footer { gap: 6px 16px; padding: 6px 10px 20px; }

  /* 32-step grids scroll horizontally on phones instead of shrinking to dots */
  .app-32 .lane-grid { min-width: 620px; }
}