:root {
  --bg: #070b12;
  --bg2: #0c1320;
  --panel: rgba(20, 28, 42, 0.72);
  --panel-brd: rgba(120, 160, 210, 0.14);
  --txt: #e9f1fb;
  --muted: #8497ad;
  --cyan: #2ee6d6;
  --blue: #3aa0ff;
  --green: #34d399;
  --amber: #f59e0b;
  --red: #ef4444;
  --glow: 0 0 20px;
  --acid: #ff7a45;
  --base: #6aa3ff;
}
* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  height: 100%;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: radial-gradient(1200px 700px at 70% -10%, #15243c 0%, var(--bg) 55%), var(--bg);
  color: var(--txt);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
/* ---------- top bar ---------- */
header {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--panel-brd);
  background: rgba(8, 12, 20, 0.6);
  backdrop-filter: blur(8px);
}
.brand {
  font-weight: 700;
  letter-spacing: 0.4px;
  font-size: 16px;
}
.brand b {
  color: var(--cyan);
}
.brand small {
  color: var(--muted);
  font-weight: 400;
  margin-left: 8px;
  font-size: 12px;
}
.chips {
  display: flex;
  gap: 8px;
  margin-left: auto;
  flex-wrap: wrap;
}
.chip {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--panel-brd);
  padding: 5px 11px;
  border-radius: 20px;
}
.chip .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--red);
  transition: 0.3s;
}
.chip .dot.on {
  background: var(--green);
  box-shadow: var(--glow) var(--green);
}
.chip .dot.warn {
  background: var(--amber);
  box-shadow: var(--glow) var(--amber);
}
select#role {
  background: #0e1726;
  color: var(--txt);
  border: 1px solid var(--panel-brd);
  border-radius: 9px;
  padding: 6px 10px;
  font-size: 13px;
}
/* ---------- alarm ---------- */
#alarm {
  display: none;
  align-items: center;
  gap: 10px;
  background: linear-gradient(90deg, rgba(239, 68, 68, 0.25), transparent);
  border-bottom: 1px solid rgba(239, 68, 68, 0.4);
  color: #ffd9d9;
  padding: 9px 20px;
  font-size: 13px;
  font-weight: 600;
}
#alarm.show {
  display: flex;
  animation: pulseAlarm 1.4s infinite;
}
@keyframes pulseAlarm {
  50% {
    background: linear-gradient(90deg, rgba(239, 68, 68, 0.45), transparent);
  }
}
/* ---------- layout ---------- */
main {
  display: grid;
  grid-template-columns: 1.05fr 1fr 360px;
  gap: 16px;
  padding: 16px 20px;
  height: calc(100% - 58px);
}
.panel {
  background: var(--panel);
  border: 1px solid var(--panel-brd);
  border-radius: 16px;
  padding: 16px;
  backdrop-filter: blur(10px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.panel h2 {
  margin: 0 0 12px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
}
/* ---------- vessel synoptic ---------- */
.synoptic {
  align-items: center;
  justify-content: center;
  position: relative;
}
.vessel-wrap {
  position: relative;
  width: 100%;
  max-width: 340px;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
svg.vessel {
  width: 100%;
  height: auto;
  max-height: 100%;
}
.ph-overlay {
  position: absolute;
  top: 14px;
  left: 0;
  right: 0;
  text-align: center;
  pointer-events: none;
}
.ph-overlay .val {
  font-size: 46px;
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 0 18px rgba(46, 230, 214, 0.5);
}
.ph-overlay .lbl {
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 1px;
}
.bubble {
  animation: rise linear infinite;
}
@keyframes rise {
  0% {
    transform: translateY(0);
    opacity: 0;
  }
  15% {
    opacity: 0.8;
  }
  100% {
    transform: translateY(-150px);
    opacity: 0;
  }
}
.impeller {
  transform-origin: 200px 250px;
  animation: spin 2.4s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
.pump {
  transition: 0.3s;
  opacity: 0.6;
}
.pump.dosing {
  opacity: 1;
  filter: drop-shadow(0 0 7px currentColor);
}
.pump .pct {
  opacity: 0.5;
}
.pump.dosing .pct {
  opacity: 1;
}
.rotor {
  transform-box: fill-box;
  transform-origin: center;
  animation: spin 1.4s linear infinite;
  animation-play-state: paused;
}
.pump.dosing .rotor {
  animation-play-state: running;
}
.flow {
  stroke-dasharray: 5 7;
  opacity: 0.12;
  transition: opacity 0.3s;
}
.flow.on {
  opacity: 0.9;
  animation: flow 0.55s linear infinite;
}
@keyframes flow {
  to {
    stroke-dashoffset: -12;
  }
}
.drops circle {
  transform-box: fill-box;
  opacity: 0;
}
.drops.on circle {
  animation: drip 1.05s linear infinite;
}
.drops.on circle:nth-child(2) {
  animation-delay: 0.36s;
}
.drops.on circle:nth-child(3) {
  animation-delay: 0.72s;
}
@keyframes drip {
  0% {
    transform: translateY(0);
    opacity: 0;
  }
  14% {
    opacity: 1;
  }
  86% {
    opacity: 1;
  }
  100% {
    transform: translateY(48px);
    opacity: 0;
  }
}
/* ---------- gauge + chart ---------- */
.metricrow {
  display: flex;
  gap: 16px;
  margin-bottom: 8px;
}
.metric {
  flex: 1;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--panel-brd);
  border-radius: 12px;
  padding: 12px;
}
.metric .k {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.metric .v {
  font-size: 24px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  margin-top: 3px;
}
.metric .v small {
  font-size: 13px;
  color: var(--muted);
  font-weight: 400;
}
canvas#chart {
  width: 100%;
  flex: 1;
  min-height: 150px;
}
/* ---------- controls ---------- */
.controls .seg {
  display: inline-flex;
  background: #0e1726;
  border-radius: 10px;
  padding: 3px;
  margin-bottom: 14px;
}
.controls .seg button {
  background: transparent;
  border: 0;
  color: var(--muted);
  padding: 7px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
}
.controls .seg button.active {
  background: var(--cyan);
  color: #04201d;
  font-weight: 700;
}
.ctl {
  margin-bottom: 14px;
}
.ctl label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}
.ctl label b {
  color: var(--txt);
}
input[type='range'] {
  width: 100%;
}
input[type='range'].acid {
  accent-color: var(--acid);
}
input[type='range'].base {
  accent-color: var(--base);
}
input[type='number'] {
  background: #0e1726;
  color: var(--txt);
  border: 1px solid var(--panel-brd);
  border-radius: 8px;
  padding: 7px 9px;
  width: 80px;
  font-size: 14px;
}
.btn-stop {
  width: 100%;
  background: var(--red);
  border: 0;
  color: #fff;
  font-weight: 700;
  padding: 11px;
  border-radius: 10px;
  cursor: pointer;
}
.locked {
  opacity: 0.4;
  pointer-events: none;
}
.dl {
  color: var(--cyan);
  font-size: 12px;
  text-decoration: none;
}
/* ---------- chat ---------- */
.chat {
  grid-row: 1;
  display: flex;
  flex-direction: column;
}
.chat .msgs {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-right: 4px;
}
.msg {
  max-width: 88%;
  padding: 9px 12px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.45;
}
.msg.user {
  align-self: flex-end;
  background: var(--blue);
  color: #04203f;
}
.msg.assistant {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--panel-brd);
}
.msg.assistant.think {
  color: var(--muted);
  font-style: italic;
}
.chat .inputrow {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}
.chat input {
  flex: 1;
  background: #0e1726;
  color: var(--txt);
  border: 1px solid var(--panel-brd);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 13px;
}
.chat .send {
  background: var(--cyan);
  border: 0;
  color: #04201d;
  font-weight: 700;
  border-radius: 10px;
  padding: 0 16px;
  cursor: pointer;
}
.suggest {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}
.suggest button {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--panel-brd);
  color: var(--muted);
  font-size: 11px;
  padding: 5px 9px;
  border-radius: 14px;
  cursor: pointer;
}
.events {
  margin-top: 10px;
  font-size: 11px;
  color: var(--muted);
  max-height: 84px;
  overflow-y: auto;
}
.events div {
  padding: 2px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}
@media (max-width: 1100px) {
  main {
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: minmax(0, 1fr);
  }
  .chat {
    grid-column: span 2;
  }
}