/* =========================================================
   Theme + Globals
   ========================================================= */
:root {
  --bg: #0b0b0b;
  --panel: #151515;
  --muted: #8b8b8b;
  --text: #f2f2f2;
  --topbar-h: 64px;   /* sticky top bar height */
  --dropbar-h: 72px;  /* sticky footer height */
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  /* keep content clear of sticky bars */
  padding-top: var(--topbar-h);
  padding-bottom: calc(var(--dropbar-h) + env(safe-area-inset-bottom));
}

.hidden { display: none; }

/* =========================================================
   Top Bar (sticky)
   ========================================================= */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid #222;
  background: var(--bg);
}

.topbar.top-fixed {
  position: fixed;
  inset: 0 0 auto 0;               /* top:0; left:0; right:0 */
  z-index: 10000;
  background: rgba(11,11,11,0.92);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid #222;
}

.brand { display: flex; align-items: center; gap: 12px; }
.logo  {
  width: 36px; height: 36px; background:#1f1f1f;
  border-radius: 12px; display: grid; place-items: center;
  box-shadow: 0 2px 8px rgba(0,0,0,.35);
}
.topbar h1 { margin: 0; font-size: 18px; font-weight: 600; }
.topbar p  { margin: 0; color: var(--muted); font-size: 12px; }

.actions-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.format { display: flex; align-items: center; gap: 6px; font-size: 13px; color: #d0d0d0; }
.format select {
  background: #1f1f1f; color: var(--text);
  border: 1px solid #333; border-radius: 8px; padding: 6px 10px;
}

/* =========================================================
   Layout + Panels
   ========================================================= */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 20px;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 14px;
}

.panel {
  background: var(--panel);
  border: 1px solid #212121;
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,.35);
}

.panel h2 { margin: 0 0 10px; font-size: 14px; font-weight: 600; }

/* =========================================================
   Player (waveform + transport)
   ========================================================= */
.player { grid-column: 1 / -1; }

.now-playing {
  text-align: center;
  margin: 0 0 8px;
  font-weight: 600;
}

/* Canvas is CSS-sized; JS syncs its bitmap */
.wave {
  width: 100%;
  height: 130px;                 /* reduced from 180px */
  display: block;
  background: #0f0f0f;
  border-radius: 14px;
}

/* Transport row */
.scrub {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;               /* balanced spacing above play row */
}
.scrub span { font-size: 12px; color: var(--muted); }

/* Generic progress bar (thin for transport, thick for exporter) */
.progress {
  width: 100%;
  border-radius: 999px;
  overflow: hidden;
  background: #0d0d0d;
  border: 1px solid #2a2a2a;
}
.progress.thin { height: 8px; }

.bar { height: 100%; background: #f2f2f2; }

/* Global Play/Pause row */
.player-controls-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px;
  margin-top: 4px;               /* small gap above row */
}

#globalPlayPause.btn {
  min-width: 84px;
  padding: 8px 14px;
}

/* =========================================================
   Controls + Presets
   ========================================================= */
.controls { grid-column: 1 / span 1; }
.presets  { grid-column: 2 / span 1; }

.slider { display: block; margin-bottom: 14px; }
.slider span   { display: block; font-size: 13px; margin-bottom: 6px; color: #d0d0d0; }
.slider small  { color: var(--muted); }
.slider input[type="range"] { width: 100%; }

.preset-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
.preset-grid .btn { width: 100%; text-align: center; }

/* Buttons / links */
.btn {
  background: rgba(255,255,255,.08);
  color: var(--text);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 12px;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 14px;
}
.btn:hover   { background: rgba(255,255,255,.15); }
.btn:disabled{ opacity: .5; cursor: not-allowed; }

.link {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
}
.link:hover { color: var(--text); text-decoration: underline; }

/* save preset button variant */
.btn.btn-alt {
  background: #1f1f1f;   /* slightly lighter/different grey than other .btn */
  color: #f2f2f2;
  border: 1px solid #3a3a3a;
}
.btn.btn-alt:hover { filter: brightness(1.1); }
.user-preset { /* optional: subtle look for user presets */
  background: #1f1f1f;
  border: 1px solid #1f1f1f;;
  border: 1px solid #3a3a3a;
}
.user-preset:hover { filter: brightness(1.07); }

.preset-hint {
  grid-column: 1 / -1;      /* span full width of the grid */
  font-size: 14px;
  color: rgb(240, 113, 113);
  margin-top: 8px;
  text-align: center;
  opacity: 0.8;
}

/* =========================================================
   Files (full width; space outside panel for sticky footer)
   ========================================================= */
.files-header { display: flex; align-items: center; justify-content: space-between; }

.files-panel {
  grid-column: 1 / -1;                                   /* span full width */
  margin-bottom: calc(var(--dropbar-h) + 24px);          /* breathing room OUTSIDE panel */
}

.file-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.file {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #111;
  border: 1px solid #222;
  border-radius: 12px;
  padding: 10px;
}
.file .meta { display: flex; align-items: center; gap: 10px; }
.file .name {
  font-size: 14px;
  max-width: 42ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file .size    { font-size: 12px; color: var(--muted); }
.file .actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* =========================================================
   Sticky Export Progress (under top bar)
   ========================================================= */
.progress-fixed {
  position: fixed;
  top: var(--topbar-h);
  left: 0; right: 0;
  z-index: 9999;
  padding: 14px 20px;
  background: rgba(10,10,10,0.78);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid #222;
  transition: transform .25s ease, opacity .25s ease;
}
.progress-fixed.hidden {
  transform: translateY(-10px);
  opacity: 0;
  pointer-events: none;
}

.progress-inner {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* exporter bar reuses .progress/.bar; only height differs */
.progress-inner .progress { height: 10px; }
.progress-inner .muted    { margin: 0; text-align: center; }

/* =========================================================
   Sticky Drop Footer (drag & drop pill)
   ========================================================= */
.drop-footer {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 9000;
  /* padding: 8px 16px calc(8px + env(safe-area-inset-bottom)); */
  background: transparent;
  pointer-events: none;            /* only the pill can interact */
}
.drop-footer .drop-footer-inner {
  max-width: 1240px;
  margin: 0 auto;
}

/* Footer pill uses the same visual language as panels */
.dropzone.dropzone-footer {
  pointer-events: auto;
  min-height: var(--dropbar-h);
  padding: 10px 18px;
  border-radius: 16px;
  border: 2px dashed rgba(255,255,255,.25);
  background: #121212;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text);
  user-select: none;
  cursor: pointer;
}
.dropzone.dropzone-footer.hover {
  border-color: rgba(255,255,255,.8);
  background: rgba(255,255,255,.06);
}
.dropzone.dropzone-footer:focus-visible {
  outline: 2px solid #6b6bff;
  outline-offset: 3px;
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 840px) {
  .container { grid-template-columns: 1fr; }
  .controls, .presets, .files-panel { grid-column: 1 / span 1; }
}