:root {
  --bg: #e9edf1;
  --panel: #ffffff;
  --ink: #1c2733;
  --steel: #5b6b7c;
  --line: #d3dae2;
  --rot: #1f6fb2;      /* rotation */
  --trq: #b7790a;      /* torque */
  --ax: #2f7d4f;       /* axial */
  --focus: #1f6fb2;
  --radius: 6px;
  --font: "Barlow", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-cond: "Barlow Semi Condensed", "Barlow", "Arial Narrow", sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.45 var(--font);
  font-variant-numeric: tabular-nums;
}
button, input, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

.app { display: grid; grid-template-columns: 360px minmax(0, 1fr); height: 100vh; }
.app.case-hidden { grid-template-columns: 0 minmax(0, 1fr); }
.app.case-hidden .case { display: none; }
.app.case-hidden .work { grid-column: 2; }

/* ------------------------------------------------------------ case panel */
.case {
  background: var(--panel);
  border-right: 1px solid var(--line);
  display: flex; flex-direction: column; min-height: 0;
}
.case-head { display: flex; justify-content: space-between; align-items: flex-start; padding: 18px 18px 10px; }
.case-head h1 { font: 700 24px/1 var(--font); letter-spacing: -0.01em; margin: 0; }
.case-name { margin: 6px 0 0; color: var(--steel); font-size: 14px; }
.case-scroll { overflow-y: auto; padding: 0 18px 12px; flex: 1; }
.case-foot { border-top: 1px solid var(--line); padding: 12px 18px 16px; display: grid; gap: 8px; }
.file-row { display: flex; flex-wrap: wrap; gap: 6px; }
.file-row .btn { flex: 1 1 auto; padding: 6px 8px; }
.hint { margin: 0; font-size: 13px; color: #b8326e; }

details.sec { border-bottom: 1px solid var(--line); }
details.sec > summary {
  cursor: pointer; list-style: none; padding: 12px 0 10px;
  font: 600 16px/1.2 var(--font-cond); display: flex; justify-content: space-between;
}
details.sec > summary::-webkit-details-marker { display: none; }
details.sec > summary::after { content: "+"; color: var(--steel); font-weight: 500; }
details.sec[open] > summary::after { content: "–"; }
.sec-body { padding: 0 0 14px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 8px; }
.sec-note { margin: 0; font-size: 13px; color: var(--steel); }

.field { display: grid; grid-template-columns: 1fr 92px 54px; align-items: center; gap: 8px; }
.field label { font-size: 14px; }
.field .unit { font-size: 13px; color: var(--steel); }
.field input[type=number], .field select, .field input[type=text] { width: 100%; }
.field.check { grid-template-columns: auto 1fr; }
.field.text { grid-template-columns: 1fr 154px; }
.field.text input { width: 100%; }

input[type=number], input[type=text], select {
  border: 1px solid var(--line); border-radius: 4px; background: #fff;
  padding: 4px 6px; min-height: 30px;
}
input[type=number] { text-align: right; }

.table-wrap { overflow-x: auto; margin: 0 -4px; padding: 0 4px; }
table.grid { width: 100%; border-collapse: collapse; font-size: 13px; }
table.grid.wide { min-width: 470px; }
table.grid th { text-align: left; font-weight: 600; color: var(--steel); padding: 2px 3px; }
table.grid td { padding: 2px; }
table.grid input { width: 100%; min-width: 62px; min-height: 26px; padding: 2px 4px; font-size: 13px; }
table.grid input[type=text] { min-width: 84px; }
table.grid .del { border: 0; background: none; color: var(--steel); cursor: pointer; padding: 0 4px; }
.table-actions { display: flex; gap: 6px; }

/* -------------------------------------------------------------- buttons */
.btn {
  border: 1px solid var(--line); background: #fff; border-radius: 4px;
  padding: 6px 12px; cursor: pointer; text-align: center; text-decoration: none;
  font-weight: 500; white-space: nowrap;
}
.btn:hover { border-color: var(--steel); }
.btn.primary { background: var(--ink); color: #fff; border-color: var(--ink); font-weight: 600; }
.btn.primary:hover { background: #2d3d4f; }
.btn.quiet { background: transparent; }
.btn.file { position: relative; overflow: hidden; }
.btn.file input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.btn:disabled { opacity: .5; cursor: default; }
.icon-btn { border: 1px solid var(--line); background: #fff; border-radius: 4px; width: 30px; height: 30px; cursor: pointer; font-size: 18px; line-height: 1; }

/* ------------------------------------------------------------ workspace */
.work { overflow-y: auto; padding: 14px 18px 24px; display: grid; gap: 12px; align-content: start; min-width: 0; }

.transport {
  display: flex; flex-wrap: wrap; gap: 10px 22px; align-items: center;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 14px;
}
.group { display: flex; align-items: center; gap: 8px; }
.play-btn { min-width: 84px; background: var(--rot); border-color: var(--rot); color: #fff; font-weight: 600; }
.play-btn.playing { background: #fff; color: var(--rot); }
.clock { flex-direction: column; align-items: flex-start; gap: 0; min-width: 110px; }
.clock-time { font: 600 26px/1 var(--font-cond); }
.clock-sub { font-size: 12px; color: var(--steel); }
.pacing label { display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--steel); }
.run-ahead { display: flex; gap: 4px; }
.run-ahead input { width: 70px; }

.message { margin: 0; padding: 8px 12px; border-radius: 4px; background: #fbe9f1; color: #7d1f49; border: 1px solid #efc3d7; }
.message.info { background: #e8f1f9; color: #164e7e; border-color: #c6dbee; }


/* status strip (right of the transport controls) */
.status { margin-left: auto; display: flex; flex-wrap: wrap; align-items: center; gap: 6px 18px; }
.status > div:not(.alarm) { display: grid; grid-template-columns: auto auto; column-gap: 3px; align-items: baseline; line-height: 1.15; }
.status span { grid-column: 1 / -1; font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--steel); }
.status b { font: 600 18px/1.15 var(--font-cond); }
.status i { font-style: normal; font-size: 12px; color: var(--steel); }
.alarm { background: #fbe3e1; color: #a3271f; border: 1px solid #f0b4ae; border-radius: 4px; padding: 3px 9px; font-weight: 600; font-size: 13px; }
.alarm[hidden] { display: none; }

/* driller's display: dark instrument deck */
.deck { --dk-bg: var(--panel); --dk-cell: #fbfcfd; --dk-cell2: #f0f3f6; --dk-line: var(--line); --dk-ink: var(--ink); --dk-dim: var(--steel);
  background: var(--dk-bg); color: var(--dk-ink); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px; display: grid; gap: 8px;
  grid-template-columns: repeat(4, minmax(0, 1fr)); align-items: start; }
/* one row of six dials and two bars when there is room, otherwise two rows of four */
.deck-wrap { container-type: inline-size; }
@container (min-width: 1180px) { .deck { grid-template-columns: repeat(6, minmax(0, 1fr)) 132px 132px; } }
@container (max-width: 560px) { .deck { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.deck .gauge { background: var(--dk-cell); border: 1px solid var(--dk-line); border-radius: 7px; padding: 6px 6px 8px; display: flex; flex-direction: column; min-width: 0; align-self: stretch; }
.g-head { display: flex; align-items: center; justify-content: center; gap: 4px; min-height: 24px; }
.g-head h2 { margin: 0; font: 600 13px/1.2 var(--font); letter-spacing: .05em; text-transform: uppercase; color: var(--ink); white-space: nowrap; }
.chip { border: 1px solid var(--dk-line); background: var(--dk-cell2); color: var(--dk-dim); border-radius: 10px; font-size: 11px; padding: 0 7px; line-height: 18px; cursor: pointer; white-space: nowrap; }
.deck .gauge { position: relative; }
.chip.chip2 { position: absolute; top: 32px; left: 6px; font-size: 10px; padding: 0 6px; line-height: 16px; }
.chip:hover { color: var(--dk-ink); border-color: #9aa7b4; }
.chip.on { color: #fff; background: #0f93b8; border-color: #0f93b8; font-weight: 600; }
.deck .gauge svg { width: 100%; height: auto; display: block; touch-action: none; overflow: visible; }
.deck .gauge:not(.bar) svg { margin-block: auto; }   /* centred when a taller bar sets the row height */
.deck .gauge.bar svg { width: auto; height: 122px; margin: 0 auto; flex: none; }
@container (max-width: 1179px) { .deck .gauge.bar svg { height: 190px; } }
.deck .reads { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 3px; text-align: center; margin-top: auto; }
.deck .reads div { background: var(--dk-cell2); border-radius: 4px; padding: 2px 1px; min-width: 0; }
.deck .reads span { display: block; font-size: 10px; text-transform: uppercase; letter-spacing: .05em; color: var(--dk-dim); white-space: nowrap; overflow: hidden; }
.deck .reads b { font: 600 16px/1.2 var(--font-cond); }
.deck .gauge.bar .reads { margin-top: 2px; }
.deck .reads .s b { color: var(--ink); } .deck .reads .d b { color: #b86e06; } .deck .reads .p b { color: #0b7a9a; }
.deck .reads .l b { color: #c62828; } .deck .reads .h b { color: #5b6b7c; }
.sp-handle { cursor: grab; } .sp-handle:active { cursor: grabbing; } .sp-handle.inactive { cursor: default; }
.sp-handle:focus { outline: none; } .sp-handle:focus-visible path.vis { stroke: #1c2733; stroke-width: 2.5; }
.tin { display: flex; align-items: center; gap: 4px; justify-content: center; margin-top: 4px; font-size: 11px; color: var(--dk-dim); }
.tin input { width: 52px; background: var(--dk-cell2); border: 1px solid var(--dk-line); border-radius: 4px; color: var(--dk-ink); padding: 1px 4px; font-size: 13px; }
.deck-legend { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 4px 18px; align-items: center; color: var(--dk-dim); font-size: 12.5px; padding: 2px 4px 0; }
.deck-legend svg { vertical-align: middle; margin-right: 5px; }
.deck-toast { position: fixed; left: 50%; top: 14px; transform: translateX(-50%); z-index: 20; background: #e8f1f9; color: #164e7e; border: 1px solid #c6dbee; box-shadow: 0 4px 12px rgba(28, 39, 51, .12);
  border-radius: 6px; padding: 6px 14px; font-weight: 600; opacity: 0; transition: opacity .2s; pointer-events: none; }
.deck-toast.show { opacity: 1; }

.string-views { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr; gap: 12px; }
/* the frame is an inset shadow, not a border, so Plotly's figure (sized to the box) fits exactly inside it */
.plot { background: var(--panel); box-shadow: inset 0 0 0 1px var(--line); border-radius: var(--radius); min-height: 380px; overflow: hidden; }
.string-views .plot { height: 440px; }

.scrub { display: flex; align-items: center; gap: 12px; }
.scrub input { flex: 1; accent-color: var(--steel); }
#scrub-label { font-size: 14px; color: var(--steel); min-width: 120px; }

.traces { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 6px 6px; display: grid; gap: 4px; }
.trace-head { display: flex; align-items: center; gap: 16px; padding: 0 8px 4px; font: 600 16px/1.2 var(--font-cond); }
.trace-head .btn { margin-left: auto; font: 500 14px var(--font); }
.plot.trace { box-shadow: none; min-height: 0; height: 190px; }
.plot.trace.log { height: 860px; }   /* = LOG_HEIGHT in app.js */
.trace-head #scales-reset { margin-left: auto; }
.trace-head #scales-reset:not([hidden]) + .btn { margin-left: 0; }
.log-scroll { overflow-x: auto; }            /* narrow screens scroll the log sideways rather than crush its headers */
.log-wrap { position: relative; min-width: 1060px; }
.scale-hits { position: absolute; inset: 0; pointer-events: none; }
.scale-hit { position: absolute; pointer-events: auto; background: transparent; border: 1px solid transparent; border-radius: 4px; cursor: pointer; padding: 0; }
.scale-hit:hover, .scale-hit:focus-visible { background: rgba(31, 111, 178, .06); border-color: rgba(31, 111, 178, .3); }
.scale-pop { position: absolute; z-index: 5; width: 250px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 6px 18px rgba(28, 39, 51, .16); padding: 10px 12px; font-size: 14px; }
.sp-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.sp-head #sp-state { color: var(--steel); font-size: 12.5px; }
.sp-x { margin-left: auto; border: 0; background: none; font-size: 18px; line-height: 1; cursor: pointer; color: var(--steel); }
.sp-row { display: grid; grid-template-columns: 34px 1fr auto; align-items: center; gap: 8px; margin: 4px 0; }
.sp-row input { width: 100%; padding: 4px 6px; }
.sp-row .u { color: var(--steel); font-size: 13px; min-width: 40px; }
.sp-msg { color: #b3261e; font-size: 12.5px; min-height: 16px; }
.sp-actions { display: flex; justify-content: flex-end; gap: 8px; }
.swatch { display: inline-block; width: 18px; height: 0; border-top-width: 3px; margin-right: 8px; vertical-align: middle; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; }
.seg button { border: 0; background: #fff; padding: 4px 12px; cursor: pointer; font: 500 14px var(--font); border-right: 1px solid var(--line); }
.seg button:last-child { border-right: 0; }
.seg button[aria-checked=true] { background: var(--ink); color: #fff; }

@media (max-width: 1400px) {
  .status { margin-left: 0; }
}

@media (max-width: 1100px) {
  .string-views { grid-template-columns: 1fr 1fr; }
  .string-views .plot:first-child { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  .app { grid-template-columns: 1fr; height: auto; }
  .case { max-height: none; border-right: 0; border-bottom: 1px solid var(--line); }
  .work { padding: 10px; }
  .string-views { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }
table.grid input[type=number] { -moz-appearance: textfield; appearance: textfield; }
table.grid input[type=number]::-webkit-inner-spin-button,
table.grid input[type=number]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }

.head-tools { display: flex; gap: 8px; align-items: center; }
.field select { grid-column: 2 / 4; }

.field[hidden] { display: none; }