:root {
  --bg: #0a0e14;
  --panel: #0f1620;
  --panel-2: #121b27;
  --border: #1e2a3a;
  --border-2: #28384c;
  --text: #c5cdd6;
  --text-2: #8a96a5;
  --mute: #5b6776;
  --accent: oklch(0.82 0.16 155);
  --accent-dim: oklch(0.55 0.12 155);
  --accent-bg: oklch(0.82 0.16 155 / 0.08);
  --warn: oklch(0.78 0.16 75);
  --danger: oklch(0.7 0.18 25);
  --info: oklch(0.78 0.13 230);
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "IBM Plex Sans", -apple-system, system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 13px;
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
  height: 100vh;
}

/* ---------- Layout ---------- */
.app {
  display: grid;
  grid-template-rows: 44px 1fr 28px;
  height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding: 0 16px;
  gap: 16px;
  background: var(--panel);
}
.topbar .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}
.topbar .brand .logo {
  width: 22px; height: 22px;
  border: 1px solid var(--accent);
  position: relative;
  display: grid;
  place-items: center;
}
.topbar .brand .logo::before {
  content: "";
  width: 8px; height: 8px;
  background: var(--accent);
}
.topbar .brand .name { color: var(--text); }
.topbar .brand .name span { color: var(--accent); }
.topbar .crumbs {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--mute);
  letter-spacing: 0.05em;
}
.topbar .crumbs b { color: var(--text); font-weight: 500; }
.topbar .spacer { flex: 1; }
.topbar .meta {
  display: flex; gap: 18px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-2);
}
.topbar .meta .dot {
  display: inline-block; width: 6px; height: 6px;
  background: var(--accent); border-radius: 50%;
  margin-right: 6px;
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.statusbar {
  display: flex;
  align-items: center;
  border-top: 1px solid var(--border);
  background: var(--panel);
  font-family: var(--mono);
  font-size: 10px;
  color: var(--mute);
  padding: 0 16px;
  gap: 24px;
  letter-spacing: 0.06em;
}
.statusbar .item b { color: var(--text-2); font-weight: 500; }
.statusbar .item .ok { color: var(--accent); }
.statusbar .spacer { flex: 1; }

.main {
  display: grid;
  grid-template-columns: 280px 1fr 340px;
  overflow: hidden;
}

.col {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  overflow-y: auto;
}
.col.left { border-right: 1px solid var(--border); background: var(--panel); }
.col.right { border-left: 1px solid var(--border); background: var(--panel); }
.col.center { background: var(--bg); position: relative; overflow: hidden; }

.section {
  border-bottom: 1px solid var(--border);
  padding: 14px 16px;
  flex-shrink: 0;
}
.section:last-child { border-bottom: none; }
.section h3 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 8px;
}
.section h3::before {
  content: "";
  width: 4px; height: 4px;
  background: var(--accent);
  display: inline-block;
}
.section h3 .num {
  margin-left: auto;
  color: var(--mute);
  font-size: 9px;
  letter-spacing: 0.1em;
}

/* ---------- Form controls ---------- */
.row { display: flex; gap: 8px; margin-bottom: 10px; }
.row:last-child { margin-bottom: 0; }
.field { flex: 1; min-width: 0; margin-bottom: 10px; }
.field:last-child { margin-bottom: 0; }
.field label {
  display: block;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 4px;
}
.range-hint {
  color: var(--border-2);
  font-size: 8px;
  letter-spacing: 0.06em;
}
.input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  padding: 6px 8px;
  border-radius: 0;
  outline: none;
  transition: border-color .12s;
  -webkit-appearance: none;
  appearance: none;
}
.input:hover { border-color: var(--border-2); }
.input:focus { border-color: var(--accent); }
select.input { cursor: pointer; }

.seg {
  display: flex;
  border: 1px solid var(--border);
  background: var(--bg);
}
.seg-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-2);
  font-family: var(--mono);
  font-size: 11px;
  padding: 6px 4px;
  cursor: pointer;
  transition: all .12s;
  border-right: 1px solid var(--border);
  letter-spacing: 0.04em;
}
.seg-btn:last-child { border-right: none; }
.seg-btn:hover { color: var(--text); background: var(--panel-2); }
.seg-btn.active {
  background: var(--accent-bg);
  color: var(--accent);
}

/* ---------- Predict button ---------- */
.predict-btn {
  width: 100%;
  background: var(--accent-bg);
  border: 1px solid var(--accent-dim);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  padding: 10px;
  cursor: pointer;
  transition: all .15s;
}
.predict-btn:hover {
  background: oklch(0.82 0.16 155 / 0.15);
  border-color: var(--accent);
}
.predict-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-error {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--danger);
  border: 1px solid var(--danger);
  padding: 8px;
  margin-bottom: 8px;
  line-height: 1.5;
}

/* ---------- Building viz ---------- */
.viewport {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: radial-gradient(ellipse at center, #131c29 0%, #0a0e14 70%);
}
.viewport .grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(40, 56, 76, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(40, 56, 76, 0.18) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center center;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}
.viewport .topleft, .viewport .topright, .viewport .bottomright {
  position: absolute;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--text-2);
  pointer-events: none;
}
.viewport .topleft { top: 16px; left: 20px; }
.viewport .topright { top: 16px; right: 20px; text-align: right; }
.viewport .bottomright { bottom: 80px; right: 20px; text-align: right; }
.viewport .corner { color: var(--mute); }
.viewport .corner b { color: var(--accent); font-weight: 500; }

.viz-controls {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 4px;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 4px;
  z-index: 10;
}
.vc-btn {
  background: transparent;
  border: none;
  color: var(--text-2);
  font-family: var(--mono);
  font-size: 10px;
  padding: 4px 10px;
  cursor: pointer;
  letter-spacing: 0.08em;
  transition: all .12s;
}
.vc-btn:hover { color: var(--text); background: var(--panel-2); }
.vc-btn.active { color: var(--accent); background: var(--accent-bg); }
.vc-btn[disabled] { opacity: 0.35; cursor: not-allowed; }
.vc-btn[disabled]:hover { color: var(--text-2); background: transparent; }

.seismic-arrow {
  position: absolute;
  left: 50%;
  bottom: 80px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--warn);
  letter-spacing: 0.06em;
  pointer-events: none;
}
.seismic-arrow .bar {
  width: 80px; height: 1px; background: var(--warn);
  position: relative;
}
.seismic-arrow .bar::after {
  content: "";
  position: absolute;
  right: 0; top: -3px;
  border-left: 6px solid var(--warn);
  border-top: 3px solid transparent;
  border-bottom: 3px solid transparent;
}

.play-controls {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 8px 14px;
  z-index: 10;
}
.play-controls button {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  width: 26px; height: 26px;
  display: grid; place-items: center;
  cursor: pointer;
  transition: all .12s;
}
.play-controls button:hover { border-color: var(--accent); color: var(--accent); }
.play-controls .time {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-2);
  min-width: 100px;
}
.play-controls .time b { color: var(--accent); font-weight: 500; }
.scrub {
  width: 180px; height: 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  position: relative;
  cursor: pointer;
}
.scrub .fill { height: 100%; background: var(--accent); }
.scrub .head {
  position: absolute;
  width: 8px; height: 12px;
  background: var(--accent);
  top: -5px;
  transform: translateX(-50%);
}

/* ---------- Right panel ---------- */
.kpi {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-bottom: 10px;
}
.kpi .cell {
  background: var(--panel-2);
  padding: 10px 12px;
}
.kpi .cell .lbl {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 4px;
}
.kpi .cell .v {
  font-family: var(--mono);
  font-size: 18px;
  color: var(--text);
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.kpi .cell .v .u { font-size: 10px; color: var(--text-2); }
.kpi .cell.accent .v { color: var(--accent); }

.modes-table {
  width: 100%;
  font-family: var(--mono);
  font-size: 11px;
  border-collapse: collapse;
}
.modes-table th {
  text-align: left;
  font-weight: 400;
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mute);
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
}
.modes-table td {
  padding: 5px 8px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  transition: background .1s;
}
.modes-table tr:hover td { background: var(--panel-2); }
.modes-table tr.active td { background: var(--accent-bg); color: var(--accent); }
.modes-table td.num { text-align: right; }

/* chart */
.chart { width: 100%; height: 100%; display: block; }
.chart-wrap {
  position: relative;
  border: 1px solid var(--border);
  background: var(--bg);
  padding: 10px 8px 6px;
}
.chart-wrap .title {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 6px;
  display: flex;
  gap: 12px;
  align-items: center;
}
.chart-wrap .legend {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.chart-wrap .legend i {
  width: 10px; height: 2px;
  display: inline-block;
}

.center-grid {
  flex: 1;
  display: grid;
  grid-template-rows: 1fr 200px;
  overflow: hidden;
  height: 100%;
}

.bottom-charts {
  border-top: 1px solid var(--border);
  background: var(--panel);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1px;
  background-color: var(--border);
  overflow: hidden;
}
.bottom-charts > div {
  background: var(--panel);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.bottom-charts h3 {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.bottom-charts h3::before {
  content: "";
  width: 4px; height: 4px;
  background: var(--accent);
}
.bottom-charts .legends {
  margin-left: auto;
  display: flex;
  gap: 10px;
  font-size: 9px;
  color: var(--text-2);
}
.bottom-charts .legends span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.bottom-charts .legends i {
  display: inline-block;
  width: 12px; height: 2px;
}
.bottom-charts .chart-host {
  flex: 1;
  min-height: 0;
  position: relative;
}

/* mode shape thumbnails — contenedor con scroll horizontal */
.mode-shapes-scroll {
  display: flex;
  flex-wrap: nowrap;
  gap: 5px;
  overflow-x: auto;
  padding-bottom: 6px;
  scroll-snap-type: x mandatory;
}
.mode-shapes-scroll::-webkit-scrollbar { height: 4px; }
.mode-shapes-scroll::-webkit-scrollbar-track { background: var(--bg); }
.mode-shapes-scroll::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }
.mode-shapes-scroll::-webkit-scrollbar-thumb:hover { background: var(--mute); }

.mode-thumb {
  text-align: center;
  cursor: pointer;
  flex-shrink: 0;
  scroll-snap-align: start;
}
.mode-thumb .thumb-border {
  border: 1px solid var(--border);
  background: var(--bg);
  padding: 2px;
  transition: all .12s;
}
.mode-thumb.active .thumb-border {
  border-color: var(--accent-dim);
  background: var(--accent-bg);
}
.mode-thumb .thumb-lbl {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--mute);
  margin-top: 3px;
  letter-spacing: 0.04em;
}
.mode-thumb.active .thumb-lbl { color: var(--accent); }

/* helpers */
.muted { color: var(--mute); font-family: var(--mono); font-size: 10px; }
.muted b { color: var(--text); font-weight: 400; }
.divider { height: 1px; background: var(--border); margin: 8px 0; }