/* ---------------------------------------------------------------
   Design tokens
   Direction: night-lab instrument panel. The one real subject-
   specific idea: the accent gradient is an actual (approximate)
   visible-light spectrum, because the data itself is UV/visible
   dispersive-wave wavelengths. Everything else stays quiet.
------------------------------------------------------------------ */
:root {
  --bg:            #0B0E14;
  --panel:         #12161F;
  --panel-alt:     #161B26;
  --border:        #232838;
  --border-soft:   #1B2030;

  --text:          #E6E9F0;
  --text-muted:    #8A93A8;
  --text-faint:    #5B6478;

  --accent-uv:     #8B6BFF;
  --accent-amber:  #FFB84D;
  --accent-teal:   #4FD1C5;
  --accent-red:    #FF6B6B;

  --font-display:  'Space Grotesk', sans-serif;
  --font-body:     'Inter', sans-serif;
  --font-mono:     'IBM Plex Mono', monospace;

  --radius:        10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

::selection { background: var(--accent-uv); color: #0B0E14; }

/* ---------------------------------------------------------------
   Top bar
------------------------------------------------------------------ */
.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 22px 28px 16px;
  border-bottom: 1px solid var(--border-soft);
}

.topbar__title h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  margin: 0 0 4px;
}

.topbar__subtitle {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

#analysis-path {
  color: var(--text-faint);
}

.topbar__controls {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.control label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  font-family: var(--font-mono);
}

.control select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-color: var(--panel);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6'><path d='M0 0l5 6 5-6z' fill='%238A93A8'/></svg>");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 10px 6px;
  border: 1px solid var(--border);
  box-shadow: none;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 7px 28px 7px 10px;
  border-radius: 6px;
  min-width: 150px;
  cursor: pointer;
}

.control select:hover {
  border-color: var(--accent-uv);
}

.control select:focus-visible {
  outline: 2px solid var(--accent-uv);
  outline-offset: 1px;
}

.control select option {
  background: var(--panel);
  color: var(--text);
}

.scatter-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.control--compact {
  gap: 2px;
}

.control--compact label {
  font-size: 0.6rem;
}

.control--compact select {
  min-width: 0;
  width: 130px;
  font-size: 0.72rem;
  padding: 5px 22px 5px 8px;
  background-position: right 8px center;
}

/* ---------------------------------------------------------------
   Signature spectral bar
------------------------------------------------------------------ */
.spectrum-bar {
  height: 3px;
  width: 100%;
  background: linear-gradient(
    90deg,
    #6f2dbd 0%,
    #8b6bff 12%,
    #4f7fff 24%,
    #4fd1c5 38%,
    #63e06b 52%,
    #c7e034 64%,
    #ffb84d 78%,
    #ff8a4d 90%,
    #ff6b6b 100%
  );
  flex: none;
}

/* ---------------------------------------------------------------
   Layout grid
------------------------------------------------------------------ */
.grid {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  grid-template-areas:
    "heatmap  temporal"
    "scatter  sed";
  gap: 14px;
  padding: 18px 28px;
  min-height: 0;
}

#panel-heatmap  { grid-area: heatmap; }
#panel-scatter  { grid-area: scatter; }
#panel-temporal { grid-area: temporal; }
#panel-sed      { grid-area: sed; }

@media (max-width: 900px) {
  .grid {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(4, minmax(320px, 1fr));
    grid-template-areas:
      "heatmap"
      "scatter"
      "temporal"
      "sed";
  }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 12px 16px 8px;
  border-bottom: 1px solid var(--border-soft);
  gap: 8px 10px;
}

.panel__head h2 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.01em;
}

.panel__hint {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--text-faint);
  white-space: nowrap;
}

.panel__body {
  flex: 1;
  min-height: 0;
  position: relative;
}

.panel__body--image {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  overflow: auto;
}

.panel__body--image img {
  max-width: 100%;
  max-height: 100%;
  border-radius: 4px;
  background: transparent;
}

.placeholder, .placeholder-error {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-faint);
  text-align: center;
  padding: 0 20px;
  line-height: 1.6;
}

.placeholder-error {
  color: var(--accent-red);
}

/* ---------------------------------------------------------------
   Readout strip (bottom) — instrument-panel signature detail
------------------------------------------------------------------ */
.readout {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid var(--border-soft);
  background: var(--panel-alt);
}

.readout__item {
  flex: 1 1 140px;
  padding: 10px 20px;
  border-right: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.readout__item:last-child { border-right: none; }

.readout__label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}

.readout__value {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--accent-teal);
}

/* ---------------------------------------------------------------
   Toast (error / status messages)
------------------------------------------------------------------ */
.toast {
  position: fixed;
  bottom: 90px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel);
  border: 1px solid var(--accent-red);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  max-width: 80vw;
  z-index: 50;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}