:root {
  --bg: #fbfbfa;
  --panel: #ffffff;
  --panel-2: #f4f4f2;
  --line: #e4e3df;
  --line-strong: #d3d2cc;
  --ink: #1c1c1a;
  --ink-dim: #6b6b64;
  --ink-faint: #9d9c95;
  --accent: #059669;
  --accent-ink: #fff;
  --accent-soft: #ecfdf5;
  --teal: #0ea88e;
  --teal-soft: #e3f7f2;
  --red: #d64545;
  --red-soft: #fbeaea;
  --radius: 12px;
  --disp: 'Space Grotesk', sans-serif;
  --body: 'IBM Plex Sans', sans-serif;
  --mono: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--ink); font-family: var(--body); }
::selection { background: var(--accent-soft); color: var(--accent); }

.wrap { max-width: 960px; margin: 0 auto; }

/* ---- top actions ---- */
.top-actions { display: flex; justify-content: flex-end; margin-bottom: -6px; }

/* ---- cards ---- */
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 18px;
  box-shadow: 0 1px 2px rgba(20,20,15,.03);
  display: none;
}
.card.visible { display: block; }
.card h2 { font-family: var(--disp); font-size: 15px; font-weight: 600; margin-bottom: 16px; }

/* ---- meta grid ---- */
.meta-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px 20px; }
@media (max-width: 560px) { .meta-grid { grid-template-columns: repeat(2, 1fr); } }
.meta-item .label {
  font-family: var(--mono); font-size: 10px; letter-spacing: 1px;
  text-transform: uppercase; color: var(--ink-faint); margin-bottom: 3px;
}
.meta-item .value {
  font-family: var(--mono); font-size: 13px; font-weight: 600; color: var(--ink);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* ---- waveform ---- */
.wave-box {
  border: 1px solid var(--line); border-radius: 9px;
  background: var(--panel-2); margin-top: 14px; overflow: hidden;
}
.wave-canvas { display: block; width: 100%; }

/* ---- section blocks ---- */
.section-block { margin-bottom: 22px; }
.section-block:last-child { margin-bottom: 0; }
.section-eyebrow {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 1px;
  text-transform: uppercase; color: var(--ink-faint); margin-bottom: 12px; display: block;
}

/* ---- preset pills ---- */
.preset-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.preset-pill {
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  padding: 7px 14px; border-radius: 20px;
  border: 1px solid var(--line-strong);
  background: var(--panel); color: var(--ink-dim);
  cursor: pointer; transition: all .12s ease;
}
.preset-pill:hover { border-color: var(--accent); color: var(--accent); }
.preset-pill.active { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

/* ---- mode tabs ---- */
.mode-section { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.mode-section .section-eyebrow { margin-bottom: 0; }
.mode-tabs { display: flex; gap: 8px; }
.mode-tab {
  font-family: var(--mono); font-size: 11.5px; font-weight: 700;
  padding: 8px 20px; border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: var(--panel); color: var(--ink-dim);
  cursor: pointer; transition: all .12s ease;
}
.mode-tab:hover { border-color: var(--accent); color: var(--accent); }
.mode-tab.active { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

/* ---- crossover controls ---- */
.xover-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 600px) { .xover-row { grid-template-columns: 1fr; } }
.xover-label {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .5px;
  text-transform: uppercase; color: var(--ink-faint);
  display: block; margin-bottom: 8px;
}
.xover-ctrl { display: flex; align-items: center; gap: 10px; }
.xover-ctrl input[type=range] { flex: 1; }
.xover-val {
  font-family: var(--mono); font-size: 12px; font-weight: 700;
  color: var(--accent); white-space: nowrap; min-width: 56px; text-align: right;
}

/* ---- bands grid ---- */
.bands-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 22px;
}
.bands-row.bands-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 720px) { .bands-row { grid-template-columns: repeat(2, 1fr) !important; } }
@media (max-width: 420px) { .bands-row { grid-template-columns: 1fr !important; } }

/* ---- band panel ---- */
.band-panel {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: var(--panel);
  animation: panelIn .2s ease both;
}
@keyframes panelIn {
  from { opacity: 0; transform: translateY(8px) scale(.98); }
  to   { opacity: 1; transform: none; }
}

.band-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px 8px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
}
.band-name-col { display: flex; flex-direction: column; gap: 1px; }
.band-name {
  font-family: var(--disp); font-size: 12px; font-weight: 700;
  color: var(--ink); display: flex; align-items: center; gap: 6px;
}
.band-dot {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
}
.band-range-label {
  font-family: var(--mono); font-size: 9.5px; color: var(--ink-faint);
  padding-left: 14px;
}
.solo-btn {
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  width: 24px; height: 24px; border-radius: 6px;
  border: 1px solid var(--line-strong);
  background: var(--panel); color: var(--ink-faint);
  cursor: pointer; flex-shrink: 0; display: flex;
  align-items: center; justify-content: center;
  transition: all .1s ease;
}
.solo-btn:hover { border-color: #f59e0b; color: #f59e0b; }
.solo-btn.active { background: #f59e0b; border-color: #f59e0b; color: #fff; }

/* GR meter row */
.gr-row {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-bottom: 1px solid var(--line);
  background: var(--panel-2);
}
.gr-label-text {
  font-family: var(--mono); font-size: 9.5px;
  color: var(--ink-faint); flex-shrink: 0; width: 20px;
}
.gr-track {
  flex: 1; height: 5px; background: var(--line);
  border-radius: 3px; overflow: hidden;
}
.gr-fill {
  height: 100%; width: 0%;
  background: linear-gradient(to right, #10b981, #f59e0b 55%, #ef4444);
  transition: width .3s ease;
  border-radius: 3px;
}
.gr-val {
  font-family: var(--mono); font-size: 10px;
  color: var(--ink-faint); width: 44px; text-align: right; flex-shrink: 0;
}

/* Band body sliders */
.band-body { padding: 12px; display: flex; flex-direction: column; gap: 12px; }

.bctrl {}
.bctrl-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 5px;
}
.bctrl-label {
  font-family: var(--mono); font-size: 9.5px; letter-spacing: .5px;
  text-transform: uppercase; color: var(--ink-faint);
}
.bctrl-val {
  font-family: var(--mono); font-size: 11px; font-weight: 700; color: var(--accent);
}

/* ---- range inputs ---- */
input[type=range] {
  -webkit-appearance: none; width: 100%;
  height: 4px; border-radius: 2px;
  background: var(--line-strong); outline: none;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); cursor: pointer;
  border: 2px solid #fff; box-shadow: 0 0 0 1px var(--accent);
}
input[type=range]::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); cursor: pointer;
  border: 2px solid #fff; box-shadow: 0 0 0 1px var(--accent);
}

/* ---- export row ---- */
.export-row {
  display: flex; align-items: flex-end; gap: 16px;
  flex-wrap: wrap; margin-bottom: 0;
}
.export-left { flex: 0 0 auto; }
.out-select {
  font-family: var(--mono); font-size: 13px;
  padding: 9px 12px; border: 1px solid var(--line-strong);
  border-radius: 8px; background: var(--panel); color: var(--ink);
  width: 140px; cursor: pointer; outline: none;
}
.out-select:focus { border-color: var(--accent); }

/* ---- buttons ---- */
.btn {
  font-family: var(--mono); font-size: 12.5px; font-weight: 700;
  letter-spacing: .4px; padding: 13px 22px; border-radius: 8px;
  border: none; background: var(--accent); color: var(--accent-ink);
  cursor: pointer; display: flex; align-items: center;
  justify-content: center; gap: 8px;
}
.btn:hover { filter: brightness(1.08); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.ghost {
  background: transparent; color: var(--ink-dim);
  border: 1px solid var(--line-strong); width: auto;
}
.btn.ghost:hover { border-color: var(--red); color: var(--red); }
.btn.download { background: var(--teal); }

/* ---- progress ---- */
.bar {
  height: 4px; background: var(--line); border-radius: 2px;
  margin-top: 16px; overflow: hidden; display: none;
}
.bar.show { display: block; }
.bar > i {
  display: block; height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--teal), var(--accent));
  transition: width .15s ease;
}
.status-line { display: none; margin-top: 10px; font-family: var(--mono); font-size: 11.5px; color: var(--ink-faint); }
.status-line.show { display: block; }

/* ---- info box ---- */
.info-box {
  font-size: 12.5px; line-height: 1.55;
  padding: 14px 16px; border-radius: 9px;
  background: var(--accent-soft); color: #065f46;
}

/* ---- result ---- */
.result-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; margin-bottom: 12px;
}
.status-pill {
  display: flex; align-items: center; gap: 7px;
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  color: var(--teal); text-transform: uppercase;
}
.status-pill .pip { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); }