/* ============================================================
   SIGNAL — Tab Audio Visualizer
   Design language: lab-instrument console. Phosphor/CRT default,
   panel-meter bezels, monospace data type, glass cards.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root{
  /* ---- THEME TOKENS (overridden per data-theme) ---- */
  --bg-0: #07090a;
  --bg-1: #0c0f10;
  --panel: rgba(18, 22, 22, 0.62);
  --panel-strong: rgba(14, 17, 17, 0.82);
  --border: rgba(140, 255, 200, 0.14);
  --border-strong: rgba(140, 255, 200, 0.28);

  --accent: #5dffb0;
  --accent-2: #ffd166;
  --accent-3: #5dd2ff;
  --text-0: #eef6ef;
  --text-1: #9fb3ac;
  --text-2: #5d716b;

  --glow: 14px;
  --grid-line: rgba(140, 255, 200, 0.05);

  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

/* ---------------- THEMES ---------------- */
[data-theme="phosphor"]{
  --bg-0:#07090a; --bg-1:#0c0f10;
  --accent:#5dffb0; --accent-2:#ffd166; --accent-3:#5dd2ff;
  --border: rgba(140,255,200,0.14); --border-strong: rgba(140,255,200,0.30);
  --grid-line: rgba(140,255,200,0.05);
}
[data-theme="cyber-purple"]{
  --bg-0:#0a0716; --bg-1:#100c20;
  --accent:#b985ff; --accent-2:#ff6fd8; --accent-3:#6fe0ff;
  --border: rgba(185,133,255,0.16); --border-strong: rgba(185,133,255,0.32);
  --grid-line: rgba(185,133,255,0.06);
}
[data-theme="neon-blue"]{
  --bg-0:#050a14; --bg-1:#08101f;
  --accent:#3fc7ff; --accent-2:#7af0ff; --accent-3:#5d7bff;
  --border: rgba(63,199,255,0.16); --border-strong: rgba(63,199,255,0.32);
  --grid-line: rgba(63,199,255,0.06);
}
[data-theme="synthwave"]{
  --bg-0:#120618; --bg-1:#1a0a24;
  --accent:#ff5fa2; --accent-2:#ffb05f; --accent-3:#7a5fff;
  --border: rgba(255,95,162,0.16); --border-strong: rgba(255,95,162,0.32);
  --grid-line: rgba(255,95,162,0.06);
}
[data-theme="aurora"]{
  --bg-0:#04100e; --bg-1:#071a16;
  --accent:#56ffd1; --accent-2:#9dffb0; --accent-3:#5dc8ff;
  --border: rgba(86,255,209,0.16); --border-strong: rgba(86,255,209,0.32);
  --grid-line: rgba(86,255,209,0.06);
}
[data-theme="matrix-green"]{
  --bg-0:#040a04; --bg-1:#071007;
  --accent:#39ff6a; --accent-2:#9dff8a; --accent-3:#1fcf4a;
  --border: rgba(57,255,106,0.18); --border-strong: rgba(57,255,106,0.34);
  --grid-line: rgba(57,255,106,0.06);
}
[data-theme="fire"]{
  --bg-0:#120604; --bg-1:#1a0905;
  --accent:#ff6a3d; --accent-2:#ffc23d; --accent-3:#ff3d6a;
  --border: rgba(255,106,61,0.18); --border-strong: rgba(255,106,61,0.34);
  --grid-line: rgba(255,106,61,0.06);
}
[data-theme="ocean"]{
  --bg-0:#03090f; --bg-1:#061320;
  --accent:#2fd0e6; --accent-2:#4fa0ff; --accent-3:#2fffd0;
  --border: rgba(47,208,230,0.16); --border-strong: rgba(47,208,230,0.32);
  --grid-line: rgba(47,208,230,0.06);
}
[data-theme="sunset"]{
  --bg-0:#120a10; --bg-1:#1a0f16;
  --accent:#ff8a5f; --accent-2:#ff5f8a; --accent-3:#ffd15f;
  --border: rgba(255,138,95,0.16); --border-strong: rgba(255,138,95,0.32);
  --grid-line: rgba(255,138,95,0.06);
}
[data-theme="monochrome"]{
  --bg-0:#0a0a0a; --bg-1:#101010;
  --accent:#e8e8e8; --accent-2:#a8a8a8; --accent-3:#787878;
  --border: rgba(230,230,230,0.14); --border-strong: rgba(230,230,230,0.28);
  --grid-line: rgba(230,230,230,0.05);
}

/* ---------------- LIGHT MODE OVERRIDE ---------------- */
body.light-mode{
  --bg-0: #eef1ef;
  --bg-1: #e4e9e6;
  --panel: rgba(255,255,255,0.66);
  --panel-strong: rgba(255,255,255,0.86);
  --text-0: #10231b;
  --text-1: #41584e;
  --text-2: #7a8d83;
  --grid-line: rgba(20,40,30,0.05);
}
body.light-mode .bg-glow{ opacity: 0.35; }

/* ============================================================ */

*{ box-sizing: border-box; }
html, body{
  margin:0; padding:0; height:100%;
  background: var(--bg-0);
  color: var(--text-0);
  font-family: var(--font-display);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

button, select, input{ font-family: inherit; }

::selection{ background: var(--accent); color: var(--bg-0); }

*::-webkit-scrollbar{ width: 8px; height: 8px; }
*::-webkit-scrollbar-track{ background: transparent; }
*::-webkit-scrollbar-thumb{ background: var(--border-strong); border-radius: 4px; }

/* ---------------- BACKGROUND LAYERS ---------------- */
.bg-glow{
  position: fixed; inset: -10%;
  background:
    radial-gradient(circle at 18% 20%, color-mix(in srgb, var(--accent) 14%, transparent) 0%, transparent 45%),
    radial-gradient(circle at 82% 78%, color-mix(in srgb, var(--accent-3) 12%, transparent) 0%, transparent 45%);
  filter: blur(40px);
  z-index: 0;
  pointer-events: none;
  transition: background 0.6s ease;
}
.bg-grid{
  position: fixed; inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 34px 34px;
  z-index: 0;
  pointer-events: none;
  mask-image: radial-gradient(circle at 50% 40%, black 0%, transparent 75%);
}

/* ============================================================
   APP SHELL
   ============================================================ */
.app{
  position: relative;
  z-index: 1;
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 14px;
  gap: 12px;
}

/* ---------------- TOP BAR ---------------- */
.topbar{
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: 0 1px 0 rgba(255,255,255,0.03) inset, 0 8px 24px rgba(0,0,0,0.28);
  flex-shrink: 0;
}

.brand{ display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark{
  display: grid; place-items: center;
  width: 32px; height: 32px;
  border-radius: 9px;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid var(--border-strong);
  filter: drop-shadow(0 0 6px color-mix(in srgb, var(--accent) 60%, transparent));
}
.brand-text{ display: flex; flex-direction: column; line-height: 1.1; }
.brand-name{
  font-weight: 700; font-size: 15px; letter-spacing: 0.12em;
  color: var(--text-0);
}
.brand-sub{
  font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.08em;
  color: var(--text-2); text-transform: uppercase;
}

.readouts{
  display: flex;
  gap: 4px;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
  font-family: var(--font-mono);
}
.readouts::-webkit-scrollbar{ display: none; }
.readout{
  display: flex; flex-direction: column;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-1) 60%, transparent);
  min-width: 64px;
  flex-shrink: 0;
}
.readout-label{
  font-size: 8px; letter-spacing: 0.1em; color: var(--text-2);
  text-transform: uppercase;
}
.readout-value{
  font-size: 12.5px; font-weight: 600; color: var(--accent);
  white-space: nowrap;
  text-shadow: 0 0 8px color-mix(in srgb, var(--accent) 50%, transparent);
}

.topbar-actions{ display: flex; gap: 6px; flex-shrink: 0; }

.icon-btn{
  display: grid; place-items: center;
  width: 34px; height: 34px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-1);
  cursor: pointer;
  transition: all 0.15s ease;
}
.icon-btn:hover{
  color: var(--accent);
  border-color: var(--border-strong);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.icon-btn:active{ transform: scale(0.94); }

/* ============================================================
   MAIN STAGE
   ============================================================ */
.stage{
  position: relative;
  flex: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at 50% 0%, color-mix(in srgb, var(--accent) 5%, transparent), transparent 60%),
    var(--bg-1);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35), inset 0 0 0 1px rgba(255,255,255,0.02);
}

#vizCanvas{
  display: block;
  width: 100%;
  height: 100%;
}

.mode-chip{
  position: absolute;
  top: 14px; left: 14px;
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-1);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  backdrop-filter: blur(10px);
  pointer-events: none;
  transition: opacity 0.2s;
}

.beat-flash{
  position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 70%);
  opacity: 0;
  pointer-events: none;
  mix-blend-mode: screen;
}

/* ---------------- START OVERLAY ---------------- */
.start-overlay{
  position: absolute; inset: 0;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--bg-1) 88%, transparent);
  backdrop-filter: blur(6px);
  transition: opacity 0.35s ease, visibility 0.35s;
  z-index: 5;
}
.start-overlay.hidden{ opacity: 0; visibility: hidden; pointer-events: none; }

.start-card{
  width: min(420px, 88vw);
  text-align: center;
  padding: 38px 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong);
  background: var(--panel-strong);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}
.start-card-glyph{
  width: 64px; height: 64px;
  margin: 0 auto 18px;
  display: grid; place-items: center;
  border-radius: 16px;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px solid var(--border-strong);
  filter: drop-shadow(0 0 10px color-mix(in srgb, var(--accent) 50%, transparent));
}
.start-card h1{
  margin: 0 0 8px; font-size: 20px; font-weight: 600; letter-spacing: 0.02em;
}
.start-card p{
  margin: 0 0 22px; font-size: 13px; line-height: 1.55; color: var(--text-1);
}
.start-card p strong{ color: var(--text-0); }

.btn-primary{
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: color-mix(in srgb, var(--accent) 16%, var(--bg-1));
  color: var(--text-0);
  font-weight: 600; font-size: 13.5px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn-primary:hover{
  background: color-mix(in srgb, var(--accent) 28%, var(--bg-1));
  box-shadow: 0 0 24px color-mix(in srgb, var(--accent) 35%, transparent);
  transform: translateY(-1px);
}
.btn-primary svg{ color: var(--accent); }

.start-hint{
  margin: 14px 0 0;
  font-size: 12px;
  color: #ff7a7a;
  min-height: 16px;
}

/* ============================================================
   BOTTOM TOOLBAR
   ============================================================ */
.toolbar{
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 9px 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: 0 1px 0 rgba(255,255,255,0.03) inset, 0 8px 24px rgba(0,0,0,0.28);
  flex-shrink: 0;
}

.toolbar-row{
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0; /* allow flex children to shrink below content size */
}

/* Main row: transport, mode selector, theme, capture — must always stay
   reachable. Only the mode selector (the part with unpredictable width as
   modes get added) is allowed to scroll internally; everything else in
   this row is pinned and never pushed off-screen. */
.toolbar-row-main{ overflow: visible; }

/* Slider row sits underneath and can wrap on narrow viewports without
   ever competing with the main row for space. */
.toolbar-row-sliders{ flex-wrap: wrap; }

.toolbar-divider{
  width: 1px; height: 26px;
  background: var(--border);
  flex-shrink: 0;
}

/* Pushes capture-actions/theme-select to the row's far edge while still
   letting viz-select claim only the space it's given, never spilling over. */
.toolbar-divider-flexpush{ margin-left: auto; }

.toolbar-group{ display: flex; align-items: center; gap: 6px; flex-shrink: 0; }

.tbtn{
  display: grid; place-items: center;
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-1);
  cursor: pointer;
  transition: all 0.15s ease;
}
.tbtn:hover:not(:disabled){ color: var(--text-0); border-color: var(--border-strong); }
.tbtn:disabled{ opacity: 0.35; cursor: not-allowed; }
.tbtn-accent{
  color: var(--bg-0);
  background: var(--accent);
  border-color: var(--accent);
}
.tbtn-accent:hover:not(:disabled){
  box-shadow: 0 0 16px color-mix(in srgb, var(--accent) 50%, transparent);
}

/* The mode selector is the one element in the main row allowed to shrink
   and scroll internally — it owns whatever space is left after the fixed-
   width transport/theme/capture controls take theirs. */
.viz-select{
  display: flex; gap: 4px;
  padding: 3px;
  background: color-mix(in srgb, var(--bg-1) 60%, transparent);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  flex-shrink: 1;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.viz-select::-webkit-scrollbar{ display: none; }
.viz-btn{
  display: flex; align-items: center; gap: 6px;
  padding: 7px 11px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-1);
  font-size: 11.5px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.15s ease;
}
.viz-btn .num{
  font-family: var(--font-mono);
  font-size: 9px;
  opacity: 0.6;
}
.viz-btn:hover{ color: var(--text-0); }
.viz-btn.active{
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  color: var(--accent);
}

.sliders{ display: flex; gap: 14px; padding: 0 4px; }
.tslider{
  display: flex; align-items: center; gap: 7px;
  font-family: var(--font-mono);
  font-size: 9px; letter-spacing: 0.06em;
  color: var(--text-2);
}
.tslider input[type="range"]{ width: 64px; }

input[type="range"]{
  -webkit-appearance: none;
  appearance: none;
  height: 3px;
  background: var(--border-strong);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb{
  -webkit-appearance: none;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px color-mix(in srgb, var(--accent) 60%, transparent);
  cursor: pointer;
  margin-top: -1px;
}
input[type="range"]::-moz-range-thumb{
  width: 12px; height: 12px; border: none; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px color-mix(in srgb, var(--accent) 60%, transparent);
  cursor: pointer;
}

select{
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-1) 60%, transparent);
  color: var(--text-0);
  font-size: 11.5px;
  cursor: pointer;
}
select:focus, input:focus, button:focus{ outline: 2px solid color-mix(in srgb, var(--accent) 55%, transparent); outline-offset: 1px; }

#recDot{ color: var(--text-2); transition: color 0.2s; }
.recording #recDot{ color: #ff4d4d; filter: drop-shadow(0 0 4px #ff4d4d); }

/* ============================================================
   SETTINGS PANEL
   ============================================================ */
.settings-panel{
  position: fixed;
  top: 14px; right: 14px; bottom: 14px;
  width: min(320px, 90vw);
  background: var(--panel-strong);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
  z-index: 20;
  display: flex;
  flex-direction: column;
  transform: translateX(calc(100% + 28px));
  transition: transform 0.3s cubic-bezier(.2,.9,.25,1);
}
.settings-panel.open{ transform: translateX(0); }

.settings-scrim{
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 19;
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s;
}
.settings-scrim.open{ opacity: 1; visibility: visible; }

.settings-header{
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.settings-header h2{ margin: 0; font-size: 14px; font-weight: 600; letter-spacing: 0.02em; }

.settings-body{
  flex: 1;
  overflow-y: auto;
  padding: 6px 18px 22px;
}

.settings-section{
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.settings-section:last-child{ border-bottom: none; }
.settings-section h3{
  margin: 0 0 12px;
  font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-2);
  font-family: var(--font-mono);
}

.field{ display: flex; flex-direction: column; gap: 7px; margin-bottom: 14px; }
.field:last-child{ margin-bottom: 0; }
.field-label{
  display: flex; justify-content: space-between;
  font-size: 12px; color: var(--text-1);
}
.field-label em{
  font-style: normal; font-family: var(--font-mono);
  color: var(--accent); font-size: 11px;
}
.field input[type="range"]{ width: 100%; }
.field select{ width: 100%; }

.field.checkbox{ flex-direction: row; align-items: center; gap: 9px; }
.field.checkbox input{ width: 15px; height: 15px; accent-color: var(--accent); cursor: pointer; }
.field.checkbox span{ font-size: 12.5px; color: var(--text-1); }

.shortcut-list{ list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.shortcut-list li{ display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--text-1); }
.shortcut-list kbd{
  font-family: var(--font-mono);
  font-size: 10.5px;
  padding: 2px 7px;
  border-radius: 5px;
  border: 1px solid var(--border-strong);
  background: color-mix(in srgb, var(--bg-1) 70%, transparent);
  color: var(--text-0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 880px){
  .app{ padding: 8px; gap: 8px; }
  .brand-sub{ display: none; }
  .readouts{ display: none; }
  .topbar{ padding: 8px 10px; }
  .toolbar-row-sliders{ display: none; }
  .settings-panel{ top: 0; right: 0; bottom: 0; border-radius: 0; width: 100vw; }
}

@media (max-width: 600px){
  .viz-btn span:not(.num){ display: none; }
  .viz-btn{ padding: 9px; }
  .theme-select select{ max-width: 90px; }
}

@media (prefers-reduced-motion: reduce){
  *{ transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

.app:fullscreen, .app:-webkit-full-screen{
  padding: 10px;
  background: var(--bg-0);
}