/* Earpiece — Sound Recognition Lab
   Design tokens, dark-first with light theme variant.
   No external fonts, no external assets. */

:root {
  --bg: #07090f;
  --bg-elev: #0d1119;
  --bg-elev-2: #131826;
  --bg-elev-3: #1a2030;
  --line: #232a3a;
  --line-soft: #1a2030;
  --ink: #e7ecf3;
  --ink-soft: #b3bccc;
  --ink-mute: #7a8499;
  --ink-dim: #525c70;
  --accent-1: #5ee4ff;
  --accent-2: #c084fc;
  --accent-3: #a3e635;
  --accent-warn: #fbbf24;
  --accent-bad: #f87171;
  --grad: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  --grad-soft: linear-gradient(135deg, rgba(94, 228, 255, 0.18), rgba(192, 132, 252, 0.18));
  --shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 12px 40px rgba(0, 0, 0, 0.45);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --t: 180ms cubic-bezier(0.2, 0.7, 0.2, 1);
  --t-slow: 360ms cubic-bezier(0.2, 0.7, 0.2, 1);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
}

:root[data-theme="light"] {
  --bg: #f5f7fb;
  --bg-elev: #ffffff;
  --bg-elev-2: #f0f3f9;
  --bg-elev-3: #e7ecf3;
  --line: #d6dde8;
  --line-soft: #e4e9f1;
  --ink: #0c1322;
  --ink-soft: #344057;
  --ink-mute: #5b6781;
  --ink-dim: #8893a8;
  --accent-1: #0891b2;
  --accent-2: #7c3aed;
  --accent-3: #65a30d;
  --grad: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  --grad-soft: linear-gradient(135deg, rgba(8, 145, 178, 0.10), rgba(124, 58, 237, 0.10));
  --shadow: 0 1px 0 rgba(255, 255, 255, 0.5) inset, 0 8px 30px rgba(20, 30, 60, 0.08);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(192, 132, 252, 0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(94, 228, 255, 0.08), transparent 60%),
    var(--bg);
  background-attachment: fixed;
}

:root[data-theme="light"] body {
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(124, 58, 237, 0.07), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(8, 145, 178, 0.06), transparent 60%),
    var(--bg);
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 10px 14px;
  background: var(--bg-elev-2);
  color: var(--ink);
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 100;
}
.skip-link:focus {
  left: 0;
  outline: 2px solid var(--accent-1);
}

/* Screen-reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Top bar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(13, 17, 25, 0.6);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  position: sticky;
  top: 0;
  z-index: 10;
}
:root[data-theme="light"] .topbar {
  background: rgba(255, 255, 255, 0.7);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--grad-soft);
  border: 1px solid rgba(94, 228, 255, 0.20);
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.brand-name {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand-tag {
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

/* Buttons — base */
button, .src {
  font-family: inherit;
  color: inherit;
  cursor: pointer;
}

.ghost {
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background var(--t), border-color var(--t), color var(--t), transform var(--t);
}
.ghost:hover {
  background: var(--bg-elev-2);
  color: var(--ink);
  border-color: var(--line);
}
.ghost:active {
  transform: translateY(1px);
}
.ghost:focus-visible {
  outline: 2px solid var(--accent-1);
  outline-offset: 2px;
}

button.primary {
  background: var(--grad);
  color: #07090f;
  border: 0;
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: transform var(--t);
}
button.primary:hover { transform: translateY(-1px); }
button.primary:focus-visible {
  outline: 2px solid var(--accent-1);
  outline-offset: 2px;
}

/* Layout */
.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 1.05fr 1.25fr 1.05fr;
  gap: 18px;
  padding: 22px;
  max-width: 1640px;
  width: 100%;
  margin: 0 auto;
}

@media (max-width: 1180px) {
  .layout {
    grid-template-columns: 1fr 1fr;
  }
  .panel.viz {
    grid-column: 1 / -1;
    order: -1;
  }
}

@media (max-width: 760px) {
  .topbar { padding: 14px 16px; }
  .layout {
    grid-template-columns: 1fr;
    padding: 16px;
  }
}

.panel {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.panel-title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.panel-sub {
  margin: 0;
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: 0.02em;
}

/* Sources panel */
.source-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.src {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  background: var(--bg-elev-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  text-align: left;
  transition: background var(--t), border-color var(--t), transform var(--t);
  color: inherit;
  font: inherit;
  min-height: 64px;
}
.src:hover {
  background: var(--bg-elev-3);
  border-color: rgba(94, 228, 255, 0.25);
}
.src:focus-visible {
  outline: 2px solid var(--accent-1);
  outline-offset: 2px;
}
.src[aria-pressed="true"] {
  background: var(--grad-soft);
  border-color: rgba(94, 228, 255, 0.5);
}
.src.drop.dragover {
  background: var(--grad-soft);
  border-color: var(--accent-1);
}
.src.demo-wrap {
  flex-direction: column;
  align-items: flex-start;
  cursor: default;
  grid-column: 1 / -1;
}

.src-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(94, 228, 255, 0.06);
  color: var(--accent-1);
  flex-shrink: 0;
}
.src-label {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.src-name {
  font-weight: 600;
  font-size: 14px;
  color: var(--ink);
}
.src-hint {
  font-size: 12px;
  color: var(--ink-mute);
}

/* Demo chips */
.demo-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
  width: 100%;
}
.chip {
  background: var(--bg-elev-3);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  border-radius: var(--radius-pill);
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
  transition: background var(--t), color var(--t), border-color var(--t);
}
.chip:hover {
  background: var(--bg-elev);
  color: var(--ink);
  border-color: rgba(94, 228, 255, 0.30);
}
.chip:focus-visible {
  outline: 2px solid var(--accent-1);
  outline-offset: 2px;
}
.chip[aria-pressed="true"] {
  background: var(--grad-soft);
  border-color: rgba(94, 228, 255, 0.5);
  color: var(--ink);
}

/* Transport */
.transport {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg-elev-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
.transport-label {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-mute);
  margin-left: auto;
}
.meter {
  flex: 1;
  height: 6px;
  background: var(--bg-elev-3);
  border-radius: 99px;
  overflow: hidden;
  border: 1px solid var(--line);
}
.meter-bar {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--grad);
  transition: width 80ms linear;
}

.status {
  font-size: 12px;
  color: var(--ink-mute);
  margin: 0;
  padding: 4px 2px 0;
}

/* Visualization */
.viz-stack {
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 12px;
}
.viz-stack canvas {
  width: 100%;
  display: block;
  border-radius: var(--radius-sm);
  background: var(--bg-elev-2);
  border: 1px solid var(--line);
}
#fingerprint {
  aspect-ratio: 1 / 1;
  max-height: 460px;
  background:
    radial-gradient(circle at center, rgba(94, 228, 255, 0.06), transparent 60%),
    var(--bg-elev-2);
}
#spectro {
  height: 200px;
}
#wave {
  height: 56px;
}

/* Identification panel */
.id-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

#primary {
  background: var(--bg-elev-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 16px;
  position: relative;
  overflow: hidden;
  color: inherit;
}
#primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--grad-soft);
  opacity: 0;
  transition: opacity var(--t-slow);
  pointer-events: none;
}
#primary.has-id::before {
  opacity: 1;
}

.primary-head {
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
}
.primary-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--grad);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #07090f;
  font-size: 22px;
  font-weight: 700;
  flex-shrink: 0;
}
.primary-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.primary-name {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.primary-confidence {
  font-size: 12px;
  color: var(--ink-mute);
  font-family: var(--mono);
  letter-spacing: 0.02em;
}
.primary-desc {
  position: relative;
  margin: 12px 0 0;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.55;
  min-height: 60px;
}

/* Alternatives */
.alts {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.alt {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  background: var(--bg-elev-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
}
.alt-name {
  font-size: 13px;
  color: var(--ink-soft);
  font-weight: 500;
  position: relative;
}
.alt-pct {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
  position: relative;
}
.alt-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  background: rgba(94, 228, 255, 0.06);
  transition: width var(--t-slow);
  pointer-events: none;
}

/* Features */
.features-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-mute);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 6px 0 8px;
}
.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}
.feature-list li {
  display: grid;
  grid-template-columns: 100px 1fr 44px;
  align-items: center;
  gap: 10px;
}
.f-label {
  font-size: 12px;
  color: var(--ink-soft);
}
.f-bar {
  display: block;
  height: 6px;
  background: var(--bg-elev-3);
  border-radius: 99px;
  overflow: hidden;
  border: 1px solid var(--line);
}
.f-fill {
  display: block;
  width: 0%;
  height: 100%;
  background: var(--grad);
  transition: width 120ms linear;
}
.f-val {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
  text-align: right;
}

.numbers {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px 14px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
}
.numbers .n-row {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed var(--line-soft);
  padding-bottom: 4px;
}
.numbers .n-key { color: var(--ink-dim); }
.numbers .n-val { color: var(--ink-soft); }

/* Dialog */
dialog {
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--ink);
  border-radius: var(--radius);
  padding: 0;
  max-width: 540px;
  width: calc(100% - 32px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
}
dialog::backdrop {
  background: rgba(7, 9, 15, 0.6);
  backdrop-filter: blur(6px);
}
.dialog-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.dialog-body h2 {
  margin: 0;
  font-size: 18px;
}
.dialog-body h3 {
  margin: 8px 0 2px;
  font-size: 13px;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.dialog-body p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.6;
}
.dialog-body ul {
  margin: 0;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.6;
}
.dialog-body form {
  margin-top: 10px;
  display: flex;
  justify-content: flex-end;
}

/* Footer */
.footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 18px;
  border-top: 1px solid var(--line);
  color: var(--ink-mute);
  font-size: 12px;
  letter-spacing: 0.02em;
  flex-wrap: wrap;
}
.footer-sep {
  color: var(--ink-dim);
}

/* Pulse animation for live state */
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(94, 228, 255, 0.40); }
  50% { box-shadow: 0 0 0 8px rgba(94, 228, 255, 0); }
}
.is-live {
  animation: pulse 1.6s ease-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}