/* ============================================================
   VOCAL CLEANER — Beatif Studio identity
   Dual theme (dark default + light), premium glassmorphism.
   Single source of truth for all component styles.
   Accent: #FF4D9D (pink) → #5AA9FF (blue). Satoshi type.
   Theme is driven by [data-theme] on <html>. Toggle in top nav.
   NOTE: All functional IDs/classes referenced by vocal-free.js
   are preserved — this file only changes visuals.
   ============================================================ */

/* ---- Signature accent (theme-independent) ---- */
:root {
  --pink:   #FF4D9D;
  --blue:   #9B5CFF;   /* aliased to purple — no more blue in this system */
  --purple: #9B5CFF;
  --grad:   linear-gradient(120deg, #FF4D9D, #9B5CFF);

  --radius-card: 18px;
  --radius-pill: 999px;

  --led-red: #FF5A4D;
}

/* ============================================================
   DARK theme (default)
   ============================================================ */
:root,
[data-theme="dark"] {
  color-scheme: dark;

  --bg:        #16161A;
  --bg-2:      #1E1E24;
  --surface:   rgba(255,255,255,0.055);
  --surface-2: rgba(255,255,255,0.09);
  --surface-solid: #21212A;
  --border:    rgba(255,255,255,0.09);
  --border-2:  rgba(255,255,255,0.16);

  --text:      #F2F0FA;
  --dim:       #9896A8;
  --mute:      #5C5A6A;

  --shadow:    0 24px 60px -20px rgba(0,0,0,0.66);
  --shadow-sm: 0 12px 30px -14px rgba(0,0,0,0.6);

  /* glass building blocks */
  --glass-fill:      var(--surface);
  --glass-fill-deep: var(--surface-2);
  --glass-stroke:    rgba(255,255,255,0.10);
  --panel-edge:      var(--border-2);
  --inner-hi:        rgba(255,255,255,0.10);
  --track-bg:        rgba(255,255,255,0.08);

  /* ink aliases (older class names) */
  --ink:      var(--text);
  --ink-dim:  var(--text);
  --ink-mute: var(--dim);
  --ink-deep: var(--mute);

  /* accent tints */
  --blue-deep:  #5AA9FF;
  --blue-soft:  rgba(90,169,255,0.22);
  --blue-bg:    rgba(90,169,255,0.10);
  --blue-glow:  rgba(90,169,255,0.45);
  --pink-glow:  rgba(255,77,157,0.40);
  --accent-grad: var(--grad);

  /* legacy led aliases (Screen.jsx / knob may reference) */
  --led-white: var(--blue);
  --led-white-glow: var(--blue-glow);
  --led-white-soft: rgba(90,169,255,0.14);
  --led-blue: var(--blue);
  --led-blue-glow: var(--blue-glow);
  --led-blue-soft: rgba(90,169,255,0.14);
  --led-cyan: var(--blue);
  --led-amber: var(--pink);
  --led-amber-glow: var(--pink-glow);
  --led-green: var(--blue);
  --hairline: var(--border-2);
  --hairline-soft: var(--border);

  /* knob (JS-rendered) — black glass well, matches main site */
  --knob-face:   radial-gradient(72% 72% at 30% 24%, #2c2c37 0%, #18181f 42%, #0c0c11 74%, #060608 100%);
  --knob-edge:   rgba(255,255,255,0.10);
  --knob-inner-hi: rgba(255,255,255,0.18);
  --knob-track:  rgba(255,255,255,0.05);
  --tick:        rgba(255,255,255,0.45);
  --tick-2:      rgba(255,255,255,0.45);
  --knob-tick-mark: rgba(255,255,255,0.18);
  --knob-line:   #FFFFFF;
  --bk-line:     #FFFFFF;
  --dome-1: #34343f; --dome-2: #26262f; --dome-3: #1a1a22;
  --dome-edge: #131319; --knob-side: #050507;
  --dome-spec: rgba(255,255,255,0.28); --dome-shadow: rgba(0,0,0,0.65);
  --seat: rgba(255,255,255,0.05);
  --ring-faint: rgba(255,255,255,0.07);
}

/* ============================================================
   LIGHT theme
   ============================================================ */
[data-theme="light"] {
  color-scheme: light;

  --bg:        #F5F4FA;
  --bg-2:      #FDFCFF;
  --surface:   rgba(255,255,255,0.72);
  --surface-2: rgba(255,255,255,0.85);
  --surface-solid: #FFFFFF;
  --border:    rgba(20,20,30,0.07);
  --border-2:  rgba(20,20,30,0.12);

  --text:      #16161C;
  --dim:       #56565F;
  --mute:      #8C8C97;

  --shadow:    0 24px 60px -24px rgba(20,22,40,0.22);
  --shadow-sm: 0 12px 30px -16px rgba(20,22,40,0.18);

  --glass-fill:      var(--surface);
  --glass-fill-deep: var(--surface-2);
  --glass-stroke:    rgba(255,255,255,0.8);
  --panel-edge:      var(--border-2);
  --inner-hi:        rgba(255,255,255,0.7);
  --track-bg:        rgba(20,20,30,0.10);

  --ink:      var(--text);
  --ink-dim:  var(--dim);
  --ink-mute: var(--mute);
  --ink-deep: var(--mute);

  --blue-deep:  #3D8FE8;
  --blue-soft:  rgba(90,169,255,0.2);
  --blue-bg:    rgba(90,169,255,0.08);
  --blue-glow:  rgba(90,169,255,0.35);
  --pink-glow:  rgba(255,77,157,0.35);
  --accent-grad: var(--grad);

  --led-white: var(--blue);
  --led-white-glow: var(--blue-glow);
  --led-white-soft: rgba(90,169,255,0.12);
  --led-blue: var(--blue);
  --led-blue-glow: var(--blue-glow);
  --led-blue-soft: rgba(90,169,255,0.12);
  --led-cyan: var(--blue);
  --led-amber: var(--pink);
  --led-amber-glow: var(--pink-glow);
  --led-green: var(--blue);
  --hairline: var(--border-2);
  --hairline-soft: var(--border);

  /* knob — white frosted glass */
  --knob-face:   radial-gradient(72% 72% at 30% 24%, #ffffff 0%, #f6f6fb 30%, #e4e4ee 60%, #cfd0dd 82%, #c2c3d3 100%);
  --knob-edge:   rgba(255,255,255,0.9);
  --knob-inner-hi: rgba(255,255,255,0.95);
  --knob-track:  rgba(20,20,40,0.05);
  --tick:        rgba(40,40,55,0.40);
  --tick-2:      rgba(40,44,55,0.42);
  --knob-tick-mark: #D7DBE6;
  --knob-line:   #FF4DA0;
  --bk-line:     #FF4DA0;
  --dome-1: #ffffff; --dome-2: #fbfcff; --dome-3: #f3f4fa;
  --dome-edge: #e9ebf3; --knob-side: #eceef6;
  --dome-spec: rgba(255,255,255,0.95); --dome-shadow: rgba(40,44,80,0.16);
  --seat: rgba(150,154,180,0.30);
  --ring-faint: rgba(60,64,96,0.10);
}

* { box-sizing: border-box; }

/* ============================================================
   MAIN CARD (.face) — Beatif glass
   ============================================================ */
.face {
  font-family: 'Satoshi', system-ui, -apple-system, sans-serif;
  color: var(--text);
  position: relative;
  overflow: visible;
  max-width: 680px;
  margin: 0 auto;
  border-radius: 22px;
  background: var(--surface);
  backdrop-filter: blur(26px) saturate(1.7);
  -webkit-backdrop-filter: blur(26px) saturate(1.7);
  border: 1px solid var(--border-2);
  box-shadow:
    inset 0 1px 0 var(--inner-hi),
    var(--shadow);
  transition: box-shadow 0.4s cubic-bezier(0.22,1,0.36,1);
}
.face::before, .face::after { content: none; }
.face > * { position: relative; z-index: 1; }

/* ============================================================
   HEADER
   ============================================================ */
.fp-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 18px 22px 14px;
  background: transparent;
  position: relative;
}
.fp-header::after { display: none; }

/* fp-back hidden — nav already has All Tools back link */
.fp-back { display: none; }
.fp-back-UNUSED {
  display: inline-flex; align-items: center; gap: 6px;
  font: 500 13px/1 'Satoshi', sans-serif;
  color: var(--dim);
  background: var(--surface);
  border: 1px solid var(--border-2);
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: inset 0 1px 0 var(--inner-hi), var(--shadow-sm);
  transition: color 0.15s ease, border-color 0.15s ease, transform 0.08s ease;
}
.fp-back:hover { color: var(--text); border-color: rgba(90,169,255,0.5); transform: translateY(-1px); }
.fp-back:active { transform: translateY(0); }

.fp-brand { display: flex; align-items: center; gap: 10px; }
.fp-brand-mark {
  width: 32px; height: 32px;
  border-radius: 10px;
  background:
    radial-gradient(60% 60% at 30% 25%, rgba(255,255,255,0.55) 0%, transparent 65%),
    var(--grad);
  display: grid; place-items: center;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.45),
    0 6px 16px -4px var(--pink-glow);
}
.fp-brand-mark::after {
  content: "";
  width: 2px; height: 14px; border-radius: 1px;
  background: #ffffff;
  box-shadow: 0 0 6px rgba(255,255,255,0.7);
}
.fp-brand-text {
  font: 700 13px/1 'Satoshi', sans-serif;
  color: var(--text);
  letter-spacing: 0.06em;
}

.fp-mode-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font: 700 10.5px/1 'Satoshi', sans-serif;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--text);
  background: var(--surface);
  border: 1px solid transparent;
  background-image:
    linear-gradient(var(--surface-solid), var(--surface-solid)),
    var(--grad);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  box-shadow: inset 0 1px 0 var(--inner-hi);
}
.fp-mode-tag .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--pink);
  box-shadow: 0 0 8px var(--pink);
}
.fp-mode-tag.pro .dot { background: var(--blue); box-shadow: 0 0 8px var(--blue); }

/* ============================================================
   TITLE
   ============================================================ */
.fp-title {
  text-align: left;
  padding: 6px 24px 4px;
}
.fp-title h1 {
  margin: 0;
  font: 700 38px/1 'Satoshi', sans-serif;
  letter-spacing: -0.025em;
  color: var(--text);
}
.fp-title .pro-mark {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  font-weight: 700; margin-left: 6px;
}
.fp-title p {
  margin: 8px 0 0;
  font: 500 11px/1 'Satoshi', sans-serif;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
}

/* ============================================================
   BODY
   ============================================================ */
.fp-body {
  padding: 16px 22px 20px;
  display: flex; flex-direction: column;
  gap: 16px;
}

/* ============================================================
   DROPZONE
   ============================================================ */
.dropzone {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px dashed rgba(155,92,255,0.40);
  border-radius: var(--radius-card);
  box-shadow: inset 0 1px 0 var(--inner-hi), var(--shadow-sm);
  transition: border-color 0.15s ease, background 0.15s ease;
}
.dropzone:hover { border-color: rgba(155,92,255,0.65); }
.dropzone.has-file {
  border-style: solid;
  border-color: var(--border-2);
  background: var(--surface-2);
}
.dropzone .file-ico {
  width: 48px; height: 48px;
  border-radius: 14px;
  background:
    radial-gradient(60% 50% at 30% 25%, rgba(255,255,255,0.35) 0%, transparent 70%),
    var(--grad);
  display: grid; place-items: center;
  color: #ffffff;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.4), 0 6px 16px -6px var(--pink-glow);
}
.dropzone .file-meta { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.dropzone .file-name {
  font: 500 15px/1.2 'Satoshi', sans-serif;
  color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  letter-spacing: -0.01em;
}
.dropzone .file-sub {
  font: 400 12px/1.2 'Satoshi', sans-serif;
  color: var(--mute);
  letter-spacing: 0.01em;
}
.dropzone .file-cta {
  font: 500 12px/1 'Satoshi', sans-serif;
  color: var(--text);
  padding: 10px 16px;
  border: 1px solid var(--border-2);
  border-radius: var(--radius-pill);
  background: var(--surface);
  cursor: pointer;
  box-shadow: inset 0 1px 0 var(--inner-hi);
  transition: border-color 0.15s ease, transform 0.08s ease;
}
.dropzone .file-cta:hover { border-color: rgba(90,169,255,0.6); transform: translateY(-1px); }
.dropzone .file-cta:active { transform: translateY(0); }

/* ============================================================
   KNOB STAGE
   ============================================================ */
.knob-stage {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  justify-items: center;
  align-items: center;
  gap: 26px;
  padding: 22px 8px 16px;
  background:
    radial-gradient(60% 70% at 50% 0%, rgba(155,92,255,0.06), transparent 70%),
    rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: inset 0 1px 0 var(--inner-hi);
}
.knob-flank { display: flex; flex-direction: column; gap: 12px; width: 96px; align-items: center; text-align: center; }
.knob-flank.l { align-items: center; text-align: center; }
.knob-flank.r { align-items: center; text-align: center; }

.vu {
  display: flex; flex-direction: column-reverse; gap: 3px;
  width: 26px; height: 160px;
  padding: 6px 4px;
  background: var(--track-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.25);
}
.vu .seg { flex: 1; border-radius: 1px; background: rgba(128,128,150,0.18); }
.vu .seg.on  { background: var(--blue); box-shadow: 0 0 8px var(--blue); }
.vu .seg.mid { background: var(--pink); box-shadow: 0 0 8px var(--pink); }
.vu .seg.hot { background: var(--led-red); box-shadow: 0 0 8px rgba(255,90,77,0.55); }
.vu-label {
  font: 500 10px/1 'Satoshi', sans-serif;
  letter-spacing: 0.18em; color: var(--mute); text-transform: uppercase;
}
.flank-stat { display: flex; flex-direction: column; font-family: 'Satoshi', sans-serif; }
.flank-stat .v { font-size: 20px; font-weight: 700; color: var(--text); letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.flank-stat .l { font-size: 10px; color: var(--mute); letter-spacing: 0.12em; text-transform: uppercase; margin-top: 3px; font-weight: 500; }

.knob-wrap { display: flex; flex-direction: column; align-items: center; gap: 16px; }
.knob-label {
  font: 700 11px/1 'Satoshi', sans-serif;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
}
.knob-value {
  display: inline-flex; align-items: baseline; gap: 4px;
  font-family: 'Satoshi', sans-serif;
}
.knob-value .num {
  font-size: 44px; font-weight: 700; color: var(--text); letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}
.knob-value .unit { font-size: 18px; color: var(--mute); letter-spacing: -0.02em; font-weight: 500; }
.knob-recommend {
  font: 500 10px/1 'Satoshi', sans-serif; color: var(--blue);
  letter-spacing: 0.06em; text-align: center; margin-top: 2px;
}

/* Free lock overlay over the knob */
/* ── Beatif visual knob overlay ── */
.knob-lock-wrap {
  position: relative; display: inline-block;
  width: 140px; height: 140px;
}
#knobMount { position: absolute; inset: 0; opacity: 0; pointer-events: none; }
body[data-mode="pro"] #knobMount { opacity: 1; pointer-events: auto; }
body[data-mode="pro"] .bk-visual { display: none; }

.bk-visual {
  position: absolute; inset: 0; z-index: 1;
  display: flex; align-items: center; justify-content: center;
}
.bk-svg { width: 100%; height: 100%; overflow: visible; }

/* dome light/dark switching — --bk-line set per-theme in :root blocks above */
.bk-dome--dark  { display: none; }
.bk-dome--light { display: block; }
[data-theme="dark"]  .bk-dome--light { display: none; }
[data-theme="dark"]  .bk-dome--dark  { display: block; }

/* arc glow/core */
.bk-arc-glow { filter: blur(1.4px); opacity: 0.55; }
[data-theme="dark"] .bk-arc-glow { opacity: 0.7; }
.bk-arc-core { filter: drop-shadow(0 0 0.8px rgba(255,255,255,0.5)); }
[data-theme="dark"] .bk-arc-core { filter: drop-shadow(0 0 1.2px rgba(168,108,240,0.7)); }
.bk-dot { filter: drop-shadow(0 0 1.2px rgba(255,77,157,0.9)); }
.bk-tick { filter: drop-shadow(0 0 1.4px var(--bk-line)); }
.knob-lock-overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--surface-2);
  backdrop-filter: blur(6px) saturate(1.3);
  -webkit-backdrop-filter: blur(6px) saturate(1.3);
  border: 1px solid var(--border-2);
  box-shadow: inset 0 1px 0 var(--inner-hi);
  pointer-events: none;
  z-index: 5;
}
.knob-lock-overlay svg { opacity: 0.85; stroke: var(--blue); }
.knob-lock-overlay span {
  font: 700 9px/1.2 'Satoshi', sans-serif;
  margin-top: 5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ============================================================
   WAVEFORM PANEL
   ============================================================ */
.wave-grid { display: grid; gap: 10px; }
.wave {
  position: relative;
  background: var(--surface);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border: 1px solid var(--border-2);
  border-radius: 14px;
  padding: 12px 14px 14px;
  box-shadow: inset 0 1px 0 var(--inner-hi), var(--shadow-sm);
}
.wave-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.wave-head .name {
  font: 500 11px/1 'Satoshi', sans-serif;
  letter-spacing: 0.08em; color: var(--dim);
  display: inline-flex; align-items: center; gap: 8px;
}
.wave-head .name .led { width: 7px; height: 7px; border-radius: 50%; background: var(--mute); }
.wave-head .name.on .led { background: var(--blue); box-shadow: 0 0 8px var(--blue); }
.wave-head .name.result.on .led { background: var(--blue); box-shadow: 0 0 8px var(--blue); }
.wave-head .time {
  font: 500 11px/1 'Satoshi', sans-serif;
  color: var(--mute); letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
}
.wave svg { display: block; width: 100%; height: 60px; }
.wave.empty {
  height: 80px; display: grid; place-items: center;
  color: var(--mute);
  font: 500 12px/1 'Satoshi', sans-serif;
  letter-spacing: 0.02em;
}

/* ============================================================
   PROGRESS
   ============================================================ */
.progress {
  position: relative;
  height: 8px;
  background: var(--track-bg);
  border-radius: 999px;
  overflow: hidden;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.25);
}
.progress > i {
  position: absolute; left: 0; top: 0; bottom: 0;
  background: linear-gradient(90deg, #FF4D9D, #5AA9FF);
  box-shadow: 0 0 12px var(--blue-glow);
  border-radius: inherit;
  transition: width 0.3s ease;
}
.progress-row {
  display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center;
  font: 500 12px/1 'Satoshi', sans-serif;
  color: var(--dim);
}

/* ============================================================
   ACTION ROW + PRIMARY BUTTON
   ============================================================ */
.action-row { display: flex; align-items: center; gap: 10px; }

/* ── PRIMARY BUTTON (single source of truth — was overridden in vocal-cleaner.astro)
   purple glass system + per-theme variants + disabled btn-breathe ── */
@keyframes btn-breathe {
  0%, 100% { box-shadow: inset 0 1px 0 rgba(255,255,255,0.14), 0 4px 22px -6px rgba(155,92,255,0.38); }
  50%       { box-shadow: inset 0 1px 0 rgba(255,255,255,0.14), 0 8px 28px -5px rgba(255,77,157,0.46); }
}
.btn-primary {
  flex: 1;
  appearance: none; cursor: pointer;
  font: 700 16px/1 'Satoshi', sans-serif;
  letter-spacing: -0.01em;
  color: #ffffff;
  border-radius: 16px;
  padding: 18px 24px;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  position: relative;
  background: rgba(155, 92, 255, 0.18);
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  border: 1px solid rgba(155, 92, 255, 0.38);
  box-shadow:
    inset 0 1.5px 0 rgba(255,255,255,0.50),
    inset 0 -1px 0 rgba(100,30,200,0.20),
    0 4px 22px -6px rgba(155,92,255,0.40);
  transition: transform 0.1s ease, box-shadow 0.18s ease, opacity 0.15s ease, background 0.15s ease, border-color 0.15s ease, filter 0.15s ease;
}
.btn-primary:hover:not(:disabled) {
  background: rgba(155, 92, 255, 0.28);
  border-color: rgba(155, 92, 255, 0.58);
  filter: none;
  transform: translateY(-1px);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.20),
    0 10px 28px -6px rgba(255,77,157,0.52),
    0 4px 14px -4px rgba(155,92,255,0.42);
}
.btn-primary:active:not(:disabled) { transform: translateY(1px); }
.btn-primary:disabled {
  opacity: 1; cursor: default;
  background: rgba(155, 92, 255, 0.12);
  border-color: rgba(155, 92, 255, 0.28);
  animation: btn-breathe 3s ease-in-out infinite;
}
.btn-primary.is-busy {
  background: var(--surface-2);
  color: var(--mute);
  box-shadow: inset 0 1px 0 var(--inner-hi);
  animation: none;
}
.btn-primary .ico {
  display: inline-grid; place-items: center;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  color: #ffffff;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.20);
}
.btn-primary.is-busy .ico { background: rgba(128,128,150,0.18); color: var(--mute); }

/* light mode: soft default → vivid hover */
[data-theme="light"] .btn-primary {
  color: #ffffff;
  background:
    linear-gradient(rgba(255,255,255,0.18), rgba(255,255,255,0.06)),
    linear-gradient(120deg, #FF4D9D, #7B5CFF, #5AA9FF);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  filter: saturate(0.82) brightness(1.04);
  box-shadow:
    inset 0 1.5px 0 rgba(255,255,255,0.50),
    0 4px 18px -6px rgba(255,77,157,0.32),
    0 2px 6px -2px rgba(155,92,255,0.22);
}
[data-theme="light"] .btn-primary::after {
  content: "";
  position: absolute; inset: -2px;
  border-radius: inherit;
  background: linear-gradient(120deg, #FF4D9D, #9B5CFF, #5AA9FF);
  z-index: -1;
  opacity: 0.75;
}
[data-theme="light"] .btn-primary:hover:not(:disabled)::after { opacity: 1.0; }
[data-theme="light"] .btn-primary .ico {
  background: rgba(255,255,255,0.22);
  color: #ffffff;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.40);
}
[data-theme="light"] .btn-primary:disabled {
  filter: saturate(0.82) brightness(1.04);
  opacity: 1;
}
[data-theme="light"] .btn-primary:active:not(:disabled) {
  transform: translateY(1px);
  filter: saturate(1.0) brightness(0.97);
  box-shadow:
    inset 0 2px 4px rgba(100,20,160,0.22),
    0 2px 8px -4px rgba(255,77,157,0.28);
}
[data-theme="light"] .btn-primary:hover:not(:disabled) {
  filter: saturate(1.15) brightness(1.06);
  transform: translateY(-2px);
  box-shadow:
    inset 0 1.5px 0 rgba(255,255,255,0.52),
    0 12px 30px -6px rgba(255,77,157,0.58),
    0 4px 14px -2px rgba(155,92,255,0.42);
}
.btn-primary .sub {
  font: 500 10px/1.2 'Satoshi', sans-serif;
  opacity: 0.9; letter-spacing: 0.02em;
  display: block; margin-top: 2px;
}

/* WAV lock button (Free only) */
.btn-wav-lock {
  appearance: none; cursor: pointer;
  padding: 0 14px; height: 56px; border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border-2);
  color: var(--blue);
  font: 700 12px/1 'Satoshi', sans-serif;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  position: relative; flex-shrink: 0;
  box-shadow: inset 0 1px 0 var(--inner-hi);
  opacity: 0.8;
  transition: opacity 0.15s ease, border-color 0.15s ease;
}
.btn-wav-lock:hover { opacity: 1; border-color: rgba(90,169,255,0.5); }
.btn-wav-lock .wav-lock-icon { font-size: 10px; opacity: 0.8; }

/* Playback cluster */
.play-cluster { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.play-btn {
  appearance: none; cursor: pointer;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--grad); border: none; color: #ffffff;
  display: grid; place-items: center;
  box-shadow: 0 6px 18px -4px var(--blue-glow), inset 0 1px 0 rgba(255,255,255,0.3);
  transition: transform 0.1s ease, box-shadow 0.15s ease;
  flex-shrink: 0;
}
.play-btn:hover { transform: scale(1.06); }
.play-btn:active { transform: scale(0.95); }
.play-btn.is-playing { box-shadow: 0 6px 22px -4px var(--pink-glow), inset 0 1px 0 rgba(255,255,255,0.3); }

.ab-toggle {
  display: flex; gap: 3px;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-pill);
  padding: 4px;
  box-shadow: inset 0 1px 0 var(--inner-hi);
}
.ab-t {
  appearance: none; cursor: pointer; border: none;
  font: 500 11px/1 'Satoshi', sans-serif;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--dim);
  transition: color 0.12s, background 0.12s;
}
.ab-t.is-on {
  background: var(--surface-solid);
  color: var(--blue);
  box-shadow: var(--shadow-sm);
}

/* generic ghost button (legacy class) */
.btn-ghost {
  appearance: none; cursor: pointer;
  font: 500 13px/1 'Satoshi', sans-serif;
  color: var(--dim);
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-pill);
  padding: 12px 16px;
  display: inline-flex; align-items: center; gap: 8px;
  transition: color 0.12s;
}
.btn-ghost:hover { color: var(--text); }
.btn-ghost.is-on {
  color: #ffffff; background: var(--blue); border-color: var(--blue);
  box-shadow: 0 4px 14px var(--blue-glow);
}

/* ============================================================
   STATS
   ============================================================ */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.stat {
  background: var(--surface);
  backdrop-filter: blur(28px) saturate(1.6);
  -webkit-backdrop-filter: blur(28px) saturate(1.6);
  border: 1px solid var(--border-2);
  border-radius: 14px;
  padding: 16px 18px;
  box-shadow: inset 0 1px 0 var(--inner-hi), var(--shadow-sm);
  position: relative; overflow: hidden;
}
.stat .lbl {
  font: 500 11px/1 'Satoshi', sans-serif;
  letter-spacing: 0.08em; color: var(--mute); text-transform: uppercase;
}
.stat .v { display: flex; align-items: baseline; gap: 6px; margin-top: 10px; font-family: 'Satoshi', sans-serif; }
.stat .v .n {
  font-size: 34px; font-weight: 700; color: var(--text);
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}
.stat .v .u { font-size: 13px; color: var(--mute); letter-spacing: -0.01em; font-weight: 500; }
.stat.dim { opacity: 0.4; }
.stat .check {
  width: 28px; height: 28px;
  border-radius: 50%;
  background:
    radial-gradient(60% 50% at 30% 25%, rgba(255,255,255,0.55) 0%, transparent 70%),
    var(--grad);
  color: #ffffff;
  display: grid; place-items: center;
  box-shadow: 0 4px 12px -2px var(--pink-glow), inset 0 1px 0 rgba(255,255,255,0.4);
  margin-top: 6px;
}

/* ============================================================
   PRO UPGRADE BANNER (.banner — JS uses #upsellBtn)
   ============================================================ */
.banner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 20px 22px;
  background:
    radial-gradient(70% 120% at 0% 0%, rgba(255,77,157,0.10), transparent 60%),
    radial-gradient(70% 120% at 100% 100%, rgba(155,92,255,0.10), transparent 60%),
    rgba(255,255,255,0.03);
  border: 1px solid var(--border-2);
  border-radius: 18px;
  position: relative; overflow: hidden;
  box-shadow: inset 0 1px 0 var(--inner-hi), var(--shadow-sm);
}
.banner h3 { margin: 0; font: 700 17px/1.3 'Satoshi', sans-serif; letter-spacing: -0.02em; color: var(--text); }
.banner p { margin: 6px 0 0; font: 400 13px/1.5 'Satoshi', sans-serif; color: var(--dim); letter-spacing: -0.005em; }
.banner .price {
  font: 700 14px/1 'Satoshi', sans-serif;
  color: var(--pink);
  letter-spacing: -0.02em;
  margin-left: 6px;
  font-variant-numeric: tabular-nums;
}
.banner .cta {
  position: relative; z-index: 1;
  font: 700 14px/1 'Satoshi', sans-serif;
  letter-spacing: -0.01em;
  color: #ffffff;
  background: var(--grad);
  border: none;
  border-radius: var(--radius-pill);
  padding: 14px 22px;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.25), 0 8px 20px -8px rgba(140,50,100,0.28);
  transition: transform 0.1s ease, box-shadow 0.18s ease;
}
.banner .cta:hover { transform: translateY(-1px); box-shadow: inset 0 1px 0 rgba(255,255,255,0.25), 0 14px 28px -8px rgba(180,60,120,0.32); }
.banner .cta:active { transform: translateY(1px); }

/* ============================================================
   PRO UPGRADE STRIP (NEW) — prominent gradient-border card
   ============================================================ */
.pro-upgrade-strip {
  border-radius: 18px;
  padding: 1.5px;                 /* gradient border ring */
  background: var(--grad);
  box-shadow: 0 12px 34px -16px rgba(140,50,100,0.3), 0 12px 34px -16px rgba(60,110,200,0.26);
}
.pro-upgrade-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  border-radius: 16.5px;
  background: rgba(255,255,255,0.04);
  position: relative; overflow: hidden;
}
.pro-upgrade-inner::after {
  content: "";
  position: absolute; right: -30px; top: -50px;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(155,92,255,0.14), transparent 70%);
  pointer-events: none;
}
.pro-upgrade-label {
  font: 700 10px/1 'Satoshi', sans-serif;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: #ffffff;
  padding: 7px 11px; border-radius: 8px;
  background: var(--grad);
  box-shadow: 0 4px 12px -4px rgba(255,77,157,0.5);
  white-space: nowrap;
}
.pro-upgrade-text {
  margin: 0;
  font: 500 13.5px/1.4 'Satoshi', sans-serif;
  color: var(--text);
  letter-spacing: -0.005em;
}
.btn-upgrade-pro {
  position: relative; z-index: 1;
  font: 700 13px/1 'Satoshi', sans-serif;
  letter-spacing: -0.01em;
  color: #ffffff; text-decoration: none;
  background: var(--grad);
  border-radius: var(--radius-pill);
  padding: 13px 20px;
  display: inline-flex; align-items: center; gap: 6px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.25), 0 8px 20px -8px rgba(140,50,100,0.28);
  transition: transform 0.1s ease, box-shadow 0.18s ease;
  white-space: nowrap;
}
.btn-upgrade-pro:hover { transform: translateY(-1px); box-shadow: inset 0 1px 0 rgba(255,255,255,0.25), 0 14px 28px -8px rgba(180,60,120,0.32); }
.btn-upgrade-pro:active { transform: translateY(1px); }

/* ============================================================
   PRO chain card (Free: noise/deess active, rest locked)
   ============================================================ */
.chain {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 12px;
  background: var(--surface);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border: 1px solid var(--border-2);
  border-radius: 14px;
  box-shadow: inset 0 1px 0 var(--inner-hi), var(--shadow-sm);
  scrollbar-width: none;
}
.chain::-webkit-scrollbar { display: none; }
.chain-link {
  display: flex; flex-direction: column; gap: 8px;
  padding: 10px 8px;
  background: var(--surface-2);
  border-radius: 10px;
  border: 1px solid var(--border);
  position: relative;
  flex: initial; min-width: 0;
  box-shadow: inset 0 1px 0 var(--inner-hi);
  cursor: pointer;
  transition: box-shadow 0.12s;
}
.chain-link:hover:not(.locked) { box-shadow: 0 0 0 1px rgba(90,169,255,0.45); }
.chain-link.is-open {
  grid-column: 1 / -1;
  box-shadow: 0 0 0 1.5px var(--blue), 0 8px 22px -8px var(--blue-glow);
}
.chain-link .lbl {
  font: 700 10px/1 'Satoshi', sans-serif;
  letter-spacing: 0.04em; color: var(--dim);
  display: flex; align-items: center; justify-content: space-between;
}
.chain-link .lbl b { color: var(--text); font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chain-link .pct { color: var(--blue); font-variant-numeric: tabular-nums; }
.chain-link .pct[data-tone="warn"] { color: #E0A23A; }
.chain-link .pct[data-tone="over"] { color: var(--led-red); }
.chain-link .meter {
  position: relative; height: 5px;
  background: var(--track-bg);
  border-radius: 999px; overflow: visible;
}
/* 게이지 막대 드래그 핸들(동그라미) — 라이트/다크 테마 변수 대응 */
.chain-link .meter > b.meter-thumb {
  position: absolute; top: 50%; left: 0;
  width: 14px; height: 14px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--bg-2);
  border: 2px solid #9B5CFF;
  box-shadow: 0 1px 4px rgba(0,0,0,0.28), 0 0 6px var(--blue-glow);
  cursor: ew-resize; z-index: 2;
  transition: left 0.25s ease;
}
.chain-link.locked .meter > b.meter-thumb { display: none; }
.chain-link .meter > i {
  position: absolute; left: 0; top: 0; bottom: 0;
  background: linear-gradient(90deg, #FF4D9D, #5AA9FF);
  box-shadow: 0 0 6px var(--blue-glow);
  border-radius: inherit;
  transition: width 0.25s ease;
}
.chain-metric { font: 500 9px/1.2 'Satoshi', sans-serif; color: var(--blue); margin: 2px 0 0; letter-spacing: 0.02em; }
.chain-metric[data-tone="warn"] { color: #E0A23A; }
.chain-metric[data-tone="over"] { color: var(--led-red); font-weight: 700; }
.chain-arrow {
  display: none;
}
.chain-link .fader-inline { display: none; margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border); }
.chain-link.is-open .fader-inline { display: block; }
.chain-link.locked { cursor: default; opacity: 0.6; position: relative; }
.chain-link.locked::after {
  content: ''; position: absolute; inset: 0; border-radius: 10px;
  background: var(--surface-2); backdrop-filter: blur(1px); z-index: 1;
}
.chain-link .lock-badge {
  position: absolute; top: 6px; right: 8px;
  font: 700 9px/1 'Satoshi', sans-serif;
  letter-spacing: 0.06em; z-index: 2;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ============================================================
   PRO detail accordion + faders (legacy classes)
   ============================================================ */
.detail-toggle {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px;
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-2);
  border-radius: 14px;
  cursor: pointer;
  font: 500 13px/1 'Satoshi', sans-serif;
  color: var(--text);
  box-shadow: inset 0 1px 0 var(--inner-hi);
}
.detail-toggle .left { display: inline-flex; align-items: center; gap: 10px; }
.detail-toggle .lbl-mono {
  font: 700 11px/1 'Satoshi', sans-serif;
  letter-spacing: 0.04em; color: var(--blue);
  background: var(--blue-bg);
  padding: 5px 8px; border-radius: 6px;
}
.detail-toggle .chev { color: var(--mute); transition: transform 0.15s ease; }
.detail-toggle.open .chev { transform: rotate(180deg); }

.detail-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: 14px;
}
.fader {
  display: flex; flex-direction: column; gap: 10px;
  padding: 12px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: inset 0 1px 0 var(--inner-hi);
}
.fader .row { display: flex; align-items: baseline; justify-content: space-between; }
.fader .name { font: 700 11px/1 'Satoshi', sans-serif; color: var(--dim); }
.fader .v {
  font: 700 14px/1 'Satoshi', sans-serif;
  color: var(--blue); letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.fader .track {
  position: relative; height: 8px;
  background: var(--track-bg);
  border-radius: 999px;
  cursor: pointer;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.2);
}
.fader .track > i {
  position: absolute; left: 0; top: 0; bottom: 0;
  background: linear-gradient(90deg, #FF4D9D, #5AA9FF);
  box-shadow: 0 0 6px var(--blue-glow);
  border-radius: inherit;
}
.fader .track > b {
  position: absolute; top: 50%; transform: translate(-50%, -50%);
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--surface-solid);
  box-shadow: 0 2px 6px rgba(0,0,0,0.3), inset 0 1px 0 var(--inner-hi), 0 0 0 1px rgba(90,169,255,0.2);
}

/* ============================================================
   STATE SWITCHER / FOOTER / AB-LABELS
   ============================================================ */
.state-switcher {
  display: flex; gap: 2px; align-self: center;
  padding: 4px;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: 999px;
  margin-top: -4px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: inset 0 1px 0 var(--inner-hi);
}
.state-chip {
  appearance: none; cursor: pointer;
  font: 500 11px/1 'Satoshi', sans-serif;
  padding: 7px 12px;
  background: transparent;
  color: var(--mute);
  border: none; border-radius: 999px;
  transition: color 0.12s, background 0.12s;
}
.state-chip.is-on {
  background: var(--surface-solid);
  color: var(--blue);
  box-shadow: var(--shadow-sm);
}
.fp-foot {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 4px;
  font: 500 11px/1.4 'Satoshi', sans-serif;
  letter-spacing: 0.04em; color: var(--mute);
}
.fp-foot a { color: inherit; }
.ab-labels {
  display: flex; justify-content: flex-end; gap: 8px;
  font: 700 10px/1 'Satoshi', sans-serif;
  color: var(--mute); margin-top: -8px;
}

/* ============================================================
   Knob SVG generic classes (JS-rendered)
   ============================================================ */
.knob { position: relative; display: inline-block; }
.knob-svg { display: block; }
.knob-svg .label-mark { fill: var(--mute); font: 500 10px 'Satoshi', sans-serif; letter-spacing: 0.04em; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 720px) {
  .fp-title h1 { font-size: 30px; }
  .knob-stage { grid-template-columns: 1fr; }
  .knob-flank.l, .knob-flank.r { flex-direction: row; align-items: center; justify-content: center; gap: 18px; text-align: left; }
  .vu { width: 120px; height: 14px; flex-direction: row; }
  .stats { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr 1fr; }
  .pro-upgrade-inner { grid-template-columns: 1fr; text-align: center; justify-items: center; gap: 12px; }
  .pro-upgrade-text { order: 2; }
  .btn-upgrade-pro { order: 3; }
}
