/* ==========================================================================
   Muni+ Atlas - data.json editor
   A dark control-room surface. The basemap is desaturated to near-monochrome
   so that the only saturated colour anywhere is a Muni line colour.
   ========================================================================== */

:root {
  --bg:            #06070a;
  --bg-raise:      #0d0f15;
  --panel:         rgba(14, 16, 22, 0.82);
  --panel-solid:   #0e1016;
  --panel-hi:      rgba(255, 255, 255, 0.045);
  --line:          rgba(255, 255, 255, 0.09);
  --line-soft:     rgba(255, 255, 255, 0.055);

  --ink:           #eef0f6;
  --ink-dim:       #9aa1b4;
  --ink-faint:     #636a7d;

  --ok:            #34d399;
  --warn:          #fbbf24;
  --bad:           #fb7185;
  --info:          #60a5fa;

  --accent:        #6ea8fe;          /* replaced per-line at runtime */

  --r-sm: 8px;
  --r:    12px;
  --r-lg: 18px;

  --shadow-lift: 0 1px 0 rgba(255,255,255,.05) inset,
                 0 20px 50px -12px rgba(0,0,0,.85),
                 0 4px 14px -4px rgba(0,0,0,.6);

  --ease: cubic-bezier(.22,.8,.24,1);
  --ease-out: cubic-bezier(.16,1,.3,1);

  --rail-w: 68px;
  --strip-w: 330px;
  --inspect-w: 384px;

  --font: ui-sans-serif, -apple-system, "SF Pro Text", "Segoe UI", Inter, system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Roboto Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 13px;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
::selection { background: rgba(110,168,254,.3); }

/* Scrollbars ------------------------------------------------------------- */
*::-webkit-scrollbar { width: 9px; height: 9px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,.1); border-radius: 99px;
  border: 2px solid transparent; background-clip: content-box;
}
*::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,.2); background-clip: content-box; }

/* Shared atoms ----------------------------------------------------------- */
.micro {
  font-size: 9.5px; font-weight: 650; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-faint);
}
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.glass {
  background: var(--panel);
  backdrop-filter: blur(22px) saturate(1.5);
  -webkit-backdrop-filter: blur(22px) saturate(1.5);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lift);
}
.hide { display: none !important; }

/* ==========================================================================
   Shell
   ========================================================================== */
#app { position: fixed; inset: 0; display: flex; flex-direction: column; }

#map { position: absolute; inset: 0; }
#map canvas { outline: none; }
.maplibregl-ctrl-attrib { font-size: 10px !important; }
.maplibregl-ctrl-bottom-right { margin-right: calc(var(--inspect-w) + 12px); transition: margin-right .35s var(--ease); }
body.no-inspector .maplibregl-ctrl-bottom-right { margin-right: 12px; }

/* ==========================================================================
   Top bar
   ========================================================================== */
#topbar {
  position: relative; z-index: 40;
  height: 52px; flex: none;
  display: flex; align-items: center; gap: 14px;
  padding: 0 14px;
  background: linear-gradient(180deg, rgba(8,9,13,.96), rgba(8,9,13,.72));
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 9px; padding-right: 4px; }
.brand svg { display: block; }
.brand b { font-size: 13.5px; font-weight: 640; letter-spacing: -.01em; }
.brand span { color: var(--ink-faint); font-size: 11px; font-weight: 500; }

.divider { width: 1px; height: 22px; background: var(--line); flex: none; }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  height: 27px; padding: 0 10px;
  border-radius: 99px;
  background: var(--panel-hi);
  border: 1px solid var(--line-soft);
  color: var(--ink-dim);
  font-size: 11.5px; font-weight: 500;
  white-space: nowrap;
}
.chip b { color: var(--ink); font-weight: 600; }
.chip .dot { width: 6px; height: 6px; border-radius: 99px; background: var(--ink-faint); flex: none; }
.chip .dot.live { background: var(--ok); box-shadow: 0 0 0 3px rgba(52,211,153,.16); }
.chip .dot.warn { background: var(--warn); box-shadow: 0 0 0 3px rgba(251,191,36,.16); }
.chip .dot.bad  { background: var(--bad);  box-shadow: 0 0 0 3px rgba(251,113,133,.16); }
.chip.button { cursor: pointer; transition: background .16s, border-color .16s, color .16s; }
.chip.button:hover { background: rgba(255,255,255,.08); color: var(--ink); border-color: var(--line); }

.stat-group { display: flex; align-items: center; gap: 2px; }
.stat { display: flex; align-items: baseline; gap: 5px; padding: 0 9px; }
.stat b { font-size: 13px; font-weight: 640; font-variant-numeric: tabular-nums; }
.stat i { font-style: normal; font-size: 10px; color: var(--ink-faint); letter-spacing: .04em; text-transform: uppercase; }

.grow { flex: 1 1 auto; }

.btn {
  display: inline-flex; align-items: center; gap: 7px;
  height: 31px; padding: 0 13px;
  border-radius: 9px;
  background: var(--panel-hi);
  border: 1px solid var(--line);
  color: var(--ink-dim);
  font-size: 12px; font-weight: 560;
  transition: background .16s, color .16s, border-color .16s, transform .12s var(--ease);
}
.btn:hover:not(:disabled) { background: rgba(255,255,255,.09); color: var(--ink); }
.btn:active:not(:disabled) { transform: scale(.97); }
.btn:disabled { opacity: .38; cursor: default; }
.btn.primary {
  background: linear-gradient(180deg, #2f6df0, #2159d8);
  border-color: #3f7bf5; color: #fff;
  box-shadow: 0 4px 16px -4px rgba(47,109,240,.7), 0 1px 0 rgba(255,255,255,.22) inset;
}
.btn.primary:hover:not(:disabled) { background: linear-gradient(180deg, #3d78f4, #2a63e0); }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.ghost:hover:not(:disabled) { background: var(--panel-hi); }
.btn .count {
  min-width: 18px; height: 18px; padding: 0 5px;
  border-radius: 99px; background: rgba(255,255,255,.22);
  display: grid; place-items: center;
  font-size: 10.5px; font-weight: 700; font-variant-numeric: tabular-nums;
}
.kbd {
  font-family: var(--mono); font-size: 10px;
  padding: 2px 5px; border-radius: 5px;
  background: rgba(255,255,255,.08); border: 1px solid var(--line-soft);
  color: var(--ink-faint);
}

/* ==========================================================================
   Body: rail / strip / map / inspector
   ========================================================================== */
#body { position: relative; flex: 1 1 auto; display: flex; min-height: 0; }

/* --- line rail ----------------------------------------------------------- */
#rail {
  position: relative; z-index: 30;
  width: var(--rail-w); flex: none;
  background: linear-gradient(180deg, rgba(10,11,16,.97), rgba(8,9,13,.97));
  border-right: 1px solid var(--line);
  display: flex; flex-direction: column; align-items: center;
  padding: 12px 0; gap: 7px;
  overflow-y: auto; overflow-x: visible;
}
#rail::-webkit-scrollbar { width: 0; }

.rail-label { margin: 2px 0 4px; }

.bullet {
  position: relative;
  width: 40px; height: 40px; flex: none;
  border-radius: 13px;
  display: grid; place-items: center;
  font-size: 15px; font-weight: 700; letter-spacing: -.02em;
  color: var(--c, var(--ink-dim));
  background: color-mix(in srgb, var(--c, #fff) 13%, transparent);
  border: 1px solid color-mix(in srgb, var(--c, #fff) 26%, transparent);
  transition: transform .2s var(--ease), background .2s, color .2s, border-color .2s, box-shadow .25s;
}
.bullet:hover {
  transform: translateY(-1px) scale(1.05);
  background: color-mix(in srgb, var(--c, #fff) 24%, transparent);
  border-color: color-mix(in srgb, var(--c, #fff) 45%, transparent);
}
.bullet.on {
  color: #fff;
  background: var(--c);
  border-color: color-mix(in srgb, var(--c) 70%, white 30%);
  box-shadow: 0 0 0 1px rgba(0,0,0,.4), 0 6px 22px -4px var(--c), 0 0 34px -10px var(--c);
}
.bullet.on::after {
  content: ''; position: absolute; left: -12px; top: 50%; transform: translateY(-50%);
  width: 3px; height: 22px; border-radius: 99px; background: var(--c);
  box-shadow: 0 0 12px var(--c);
}
.bullet.dim { opacity: .32; }
.bullet .tip {
  position: absolute; left: calc(100% + 12px); top: 50%; transform: translateY(-50%) translateX(-6px);
  padding: 6px 10px; border-radius: 8px; white-space: nowrap;
  background: var(--panel-solid); border: 1px solid var(--line);
  box-shadow: var(--shadow-lift);
  font-size: 11.5px; font-weight: 550; color: var(--ink);
  opacity: 0; pointer-events: none; transition: opacity .16s, transform .16s var(--ease);
  z-index: 60;
}
.bullet .tip em { font-style: normal; color: var(--ink-faint); margin-left: 6px; font-size: 10.5px; }
.bullet:hover .tip { opacity: 1; transform: translateY(-50%) translateX(0); }

.bullet.all {
  font-size: 10px; font-weight: 700; letter-spacing: .06em; border-radius: 12px;
  color: var(--ink-dim); background: var(--panel-hi); border-color: var(--line-soft);
}
.bullet.all:hover { background: rgba(255,255,255,.1); color: var(--ink); }
.bullet.all.on { color: #fff; background: rgba(255,255,255,.14); border-color: rgba(255,255,255,.3); box-shadow: none; }
.bullet.all.on::after { display: none; }

/* --- strip (route diagram) ---------------------------------------------- */
#strip {
  position: relative; z-index: 25;
  width: var(--strip-w); flex: none;
  display: flex; flex-direction: column;
  background: linear-gradient(180deg, rgba(11,12,18,.93), rgba(8,9,13,.93));
  backdrop-filter: blur(24px) saturate(1.4);
  border-right: 1px solid var(--line);
  transition: margin-left .38s var(--ease-out), opacity .3s;
}
#strip.closed { margin-left: calc(-1 * var(--strip-w)); opacity: 0; pointer-events: none; }

.strip-head { padding: 15px 16px 13px; border-bottom: 1px solid var(--line-soft); flex: none; }
.strip-title { display: flex; align-items: center; gap: 10px; }
.strip-title .badge {
  width: 32px; height: 32px; border-radius: 10px; flex: none;
  display: grid; place-items: center;
  font-size: 14px; font-weight: 750; color: #fff; background: var(--c);
  box-shadow: 0 4px 16px -4px var(--c);
}
.strip-title h2 { margin: 0; font-size: 14.5px; font-weight: 620; letter-spacing: -.01em; }
.strip-title .sub { font-size: 10.5px; color: var(--ink-faint); margin-top: 1px; }
.strip-tools { display: flex; gap: 6px; margin-top: 12px; }
.strip-tools .btn { height: 27px; padding: 0 10px; font-size: 11px; flex: 1; justify-content: center; }

.strip-scroll { flex: 1 1 auto; overflow-y: auto; padding: 10px 0 40px; }

/* one station row in the route diagram */
.stop {
  position: relative;
  display: grid; grid-template-columns: 38px 1fr auto;
  align-items: center;
  min-height: 40px; padding: 0 12px 0 0;
  cursor: pointer;
  transition: background .14s;
}
.stop:hover { background: rgba(255,255,255,.035); }
.stop.sel { background: color-mix(in srgb, var(--c) 16%, transparent); }
.stop.sel::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--c);
}
.stop.drag-src { opacity: .35; }
.stop.drag-over-top { box-shadow: inset 0 2px 0 var(--c); }
.stop.drag-over-bottom { box-shadow: inset 0 -2px 0 var(--c); }

/* the spine + node, drawn with pseudo elements so it is one continuous line */
.node { position: relative; width: 38px; align-self: stretch; }
.node::before {              /* spine */
  content: ''; position: absolute; left: 50%; top: 0; bottom: 0;
  width: 4px; margin-left: -2px; background: var(--c); opacity: .95;
}
.stop:first-child .node::before { top: 50%; border-radius: 99px 99px 0 0; }
.stop:last-child  .node::before { bottom: 50%; border-radius: 0 0 99px 99px; }

.node i {                    /* the station marker itself */
  position: absolute; left: 50%; top: 50%;
  width: 11px; height: 11px; margin: -5.5px 0 0 -5.5px;
  border-radius: 99px; background: #0a0b10;
  border: 3px solid var(--c);
  box-sizing: border-box;
  transition: transform .2s var(--ease), box-shadow .2s;
}
.stop:hover .node i { transform: scale(1.22); }
.stop.sel .node i { transform: scale(1.35); box-shadow: 0 0 0 4px color-mix(in srgb, var(--c) 30%, transparent); }
.node.underground i { width: 15px; height: 15px; margin: -7.5px 0 0 -7.5px; border-width: 3px; background: var(--ink); }
.node.interchange i { width: 15px; height: 15px; margin: -7.5px 0 0 -7.5px; }
.node.terminal i { border-radius: 3px; width: 14px; height: 8px; margin: -4px 0 0 -7px; background: var(--c); }

.stop-main { min-width: 0; padding: 7px 0; }
.stop-name {
  font-size: 12.5px; font-weight: 520; letter-spacing: -.005em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.stop.sel .stop-name { font-weight: 620; }
.stop-meta { display: flex; align-items: center; gap: 5px; margin-top: 2px; }
.stop-meta .tag {
  font-size: 9px; font-weight: 600; letter-spacing: .05em; text-transform: uppercase;
  color: var(--ink-faint);
}
.stop-meta .pip { width: 5px; height: 5px; border-radius: 99px; }

.stop-side { display: flex; align-items: center; gap: 3px; opacity: 0; transition: opacity .14s; }
.stop:hover .stop-side, .stop.sel .stop-side { opacity: 1; }
.icon-btn {
  width: 23px; height: 23px; border-radius: 6px;
  display: grid; place-items: center; color: var(--ink-faint);
  transition: background .14s, color .14s;
}
.icon-btn:hover { background: rgba(255,255,255,.1); color: var(--ink); }
.icon-btn.danger:hover { background: rgba(251,113,133,.16); color: var(--bad); }
.grip { cursor: grab; touch-action: none; }
.grip:active { cursor: grabbing; }

/* ==========================================================================
   Inspector
   ========================================================================== */
#inspector {
  position: absolute; top: 0; right: 0; bottom: 0; z-index: 28;
  width: var(--inspect-w);
  display: flex; flex-direction: column;
  background: linear-gradient(180deg, rgba(11,12,18,.9), rgba(8,9,13,.92));
  backdrop-filter: blur(26px) saturate(1.4);
  border-left: 1px solid var(--line);
  transition: transform .4s var(--ease-out), opacity .3s;
}
#inspector.closed { transform: translateX(100%); opacity: 0; pointer-events: none; }

.insp-head { padding: 16px 16px 14px; border-bottom: 1px solid var(--line-soft); flex: none; }
.insp-head .row1 { display: flex; align-items: flex-start; gap: 10px; }
.insp-head h2 {
  margin: 0; font-size: 16px; font-weight: 640; letter-spacing: -.02em; line-height: 1.25;
  flex: 1; min-width: 0;
}
.insp-id { font-family: var(--mono); font-size: 10.5px; color: var(--ink-faint); margin-top: 3px; }
.insp-lines { display: flex; gap: 4px; margin-top: 11px; flex-wrap: wrap; }
.mini-bullet {
  width: 21px; height: 21px; border-radius: 6px;
  display: grid; place-items: center;
  font-size: 10.5px; font-weight: 750; color: #fff;
  transition: transform .16s var(--ease);
}
.mini-bullet:hover { transform: translateY(-1.5px); }
.mini-bullet.off { background: var(--panel-hi) !important; color: var(--ink-faint); box-shadow: none; }

.insp-scroll { flex: 1 1 auto; overflow-y: auto; padding: 4px 0 60px; }

.sect { border-bottom: 1px solid var(--line-soft); padding: 14px 16px; }
.sect-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.sect-head .micro { color: var(--ink-faint); }

.field { margin-bottom: 10px; }
.field:last-child { margin-bottom: 0; }
.field > label { display: block; margin-bottom: 5px; }
.inp {
  width: 100%; height: 30px; padding: 0 9px;
  border-radius: 8px;
  background: rgba(0,0,0,.4);
  border: 1px solid var(--line);
  color: var(--ink); font-size: 12.5px;
  transition: border-color .16s, background .16s, box-shadow .16s;
  outline: none;
}
.inp:hover { border-color: rgba(255,255,255,.16); }
.inp:focus {
  border-color: var(--accent); background: rgba(0,0,0,.6);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}
.inp.mono { font-family: var(--mono); font-size: 11.5px; }
.inp.bad { border-color: var(--bad); box-shadow: 0 0 0 3px rgba(251,113,133,.16); }
select.inp { appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%239aa1b4' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 9px center; padding-right: 26px; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

/* segmented control */
.seg { display: grid; grid-auto-flow: column; gap: 2px; padding: 2px;
  background: rgba(0,0,0,.4); border: 1px solid var(--line); border-radius: 9px; }
.seg button {
  height: 25px; border-radius: 7px; font-size: 11px; font-weight: 560; color: var(--ink-faint);
  transition: background .16s, color .16s;
}
.seg button:hover { color: var(--ink); }
.seg button.on { background: var(--panel-hi); color: var(--ink); box-shadow: 0 1px 0 rgba(255,255,255,.07) inset; }

/* --- platform cards ------------------------------------------------------ */
.plat {
  position: relative;
  border: 1px solid var(--line); border-radius: var(--r);
  background: rgba(255,255,255,.028);
  padding: 11px 12px 12px; margin-bottom: 9px;
  transition: border-color .18s, background .18s, box-shadow .18s;
}
.plat:hover { border-color: rgba(255,255,255,.16); background: rgba(255,255,255,.045); }
.plat.sel {
  border-color: var(--accent); background: color-mix(in srgb, var(--accent) 11%, transparent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}
.plat-head { display: flex; align-items: center; gap: 8px; margin-bottom: 9px; }
.compass {
  width: 26px; height: 26px; flex: none; border-radius: 8px;
  display: grid; place-items: center;
  background: rgba(0,0,0,.45); border: 1px solid var(--line);
  color: var(--accent);
}
.compass svg { transition: transform .35s var(--ease); }
.plat-code { font-family: var(--mono); font-size: 13px; font-weight: 600; letter-spacing: .01em; }
.plat-sub { font-size: 10px; color: var(--ink-faint); margin-top: 1px; }
.plat-actions { margin-left: auto; display: flex; gap: 2px; }

.drift-badge {
  display: inline-flex; align-items: center; gap: 5px;
  margin-top: 8px; padding: 6px 8px; border-radius: 7px;
  font-size: 10.5px; line-height: 1.35;
}
.drift-badge.moved { background: rgba(251,191,36,.12); color: #fcd34d; border: 1px solid rgba(251,191,36,.25); }
.drift-badge.missing { background: rgba(251,113,133,.12); color: #fda4af; border: 1px solid rgba(251,113,133,.25); }
.drift-badge.ok { background: rgba(52,211,153,.1); color: #6ee7b7; border: 1px solid rgba(52,211,153,.22); }
.drift-badge button { color: inherit; text-decoration: underline; text-underline-offset: 2px; font-weight: 600; }

/* chips list (transfers) */
.chips { display: flex; flex-wrap: wrap; gap: 5px; }
.tchip {
  display: inline-flex; align-items: center; gap: 6px;
  height: 25px; padding: 0 5px 0 9px; border-radius: 7px;
  background: var(--panel-hi); border: 1px solid var(--line-soft);
  font-size: 11.5px; color: var(--ink-dim);
}
.tchip:hover { color: var(--ink); border-color: var(--line); }
.tchip .x { width: 16px; height: 16px; border-radius: 4px; display: grid; place-items: center; color: var(--ink-faint); }
.tchip .x:hover { background: rgba(251,113,133,.2); color: var(--bad); }
.tchip.add { border-style: dashed; padding-right: 9px; cursor: pointer; }
.tchip.agency-on { border-style: solid; color: var(--ink); background: rgba(255,255,255,.1); }

/* a transfer link chip: direction glyph, name, walking distance, action */
.tchip.link {
  height: auto; min-height: 27px; padding: 4px 4px 4px 8px;
  gap: 7px; max-width: 100%; cursor: default;
  transition: background .15s, border-color .15s;
}
.tchip.link:hover { background: rgba(255,255,255,.1); border-color: var(--line); }
.tchip.link .dir { display: grid; place-items: center; flex: none; line-height: 0; }
.tchip.link .nm {
  min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  color: var(--ink);
}
.tchip.link em {
  font-style: normal; font-family: var(--mono); font-size: 10px;
  color: var(--ink-faint); flex: none;
}
.tchip.link.both .dir { color: var(--ok); }
.tchip.link.out  .dir { color: var(--info); }
.tchip.link.in   .dir { color: var(--warn); }
.tchip.link.in { border-color: rgba(251,191,36,.28); background: rgba(251,191,36,.07); }
.tchip.link .x.mk:hover { background: rgba(52,211,153,.2); color: var(--ok); }

.empty { color: var(--ink-faint); font-size: 11.5px; padding: 3px 0; }

/* ==========================================================================
   Map overlays
   ========================================================================== */
.map-hud {
  position: absolute; z-index: 20;
  pointer-events: none;
}
#hud-coords {
  left: 50%; transform: translateX(-50%); bottom: 14px;
  display: flex; align-items: center; gap: 10px;
  padding: 7px 13px; border-radius: 99px;
  background: rgba(8,9,13,.8); backdrop-filter: blur(16px);
  border: 1px solid var(--line);
  font-family: var(--mono); font-size: 11px; color: var(--ink-dim);
  opacity: 0; transition: opacity .25s;
}
#hud-coords.show { opacity: 1; }
#hud-coords b { color: var(--ink); font-weight: 600; }

#hud-hint {
  left: 50%; transform: translateX(-50%); top: 14px;
  padding: 8px 14px; border-radius: 10px;
  background: rgba(47,109,240,.9); backdrop-filter: blur(16px);
  border: 1px solid rgba(120,160,255,.5);
  color: #fff; font-size: 12px; font-weight: 550;
  box-shadow: 0 10px 34px -10px rgba(47,109,240,.9);
  opacity: 0; transform: translateX(-50%) translateY(-8px);
  transition: opacity .22s, transform .22s var(--ease);
}
#hud-hint.show { opacity: 1; transform: translateX(-50%) translateY(0); }

#map-tools {
  position: absolute; z-index: 22; right: 14px; top: 14px;
  display: flex; flex-direction: column; gap: 6px;
  transition: right .38s var(--ease);
}
body.inspector-open #map-tools { right: calc(var(--inspect-w) + 14px); }
.tool {
  width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center;
  background: rgba(10,12,18,.84); backdrop-filter: blur(16px);
  border: 1px solid var(--line); color: var(--ink-dim);
  transition: background .16s, color .16s, transform .12s var(--ease);
}
.tool:hover { background: rgba(22,25,34,.92); color: var(--ink); }
.tool:active { transform: scale(.94); }
.tool.on { background: var(--accent); border-color: color-mix(in srgb, var(--accent) 70%, white); color: #fff;
  box-shadow: 0 5px 18px -5px var(--accent); }

/* ==========================================================================
   Command palette
   ========================================================================== */
#scrim {
  position: fixed; inset: 0; z-index: 90;
  background: rgba(2,3,6,.62); backdrop-filter: blur(6px);
  opacity: 0; transition: opacity .2s; pointer-events: none;
}
#scrim.show { opacity: 1; pointer-events: auto; }

.modal {
  position: fixed; z-index: 100; left: 50%;
  transform: translateX(-50%) translateY(-10px) scale(.985);
  opacity: 0; pointer-events: none;
  transition: opacity .22s var(--ease), transform .28s var(--ease-out);
}
.modal.show { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); pointer-events: auto; }

#palette {
  top: 14vh; width: min(620px, 92vw);
  border-radius: var(--r-lg); overflow: hidden;
}
#palette input {
  width: 100%; height: 54px; padding: 0 18px;
  background: transparent; border: none; outline: none;
  font-size: 16px; font-weight: 450; letter-spacing: -.01em;
}
#palette input::placeholder { color: var(--ink-faint); }
.pal-list { max-height: min(52vh, 440px); overflow-y: auto; border-top: 1px solid var(--line-soft); padding: 6px; }
.pal-item {
  display: flex; align-items: center; gap: 11px;
  padding: 8px 11px; border-radius: 9px; cursor: pointer;
}
.pal-item.on { background: var(--panel-hi); }
.pal-item .lead {
  width: 26px; height: 26px; border-radius: 8px; flex: none;
  display: grid; place-items: center; font-size: 11px; font-weight: 700; color: #fff;
  background: var(--panel-hi);
}
.pal-item .txt { flex: 1; min-width: 0; }
.pal-item .t1 { font-size: 12.5px; font-weight: 520; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pal-item .t2 { font-size: 10.5px; color: var(--ink-faint); font-family: var(--mono); margin-top: 1px; }
.pal-item .rline { display: flex; gap: 3px; }
.pal-item .rline span { width: 7px; height: 7px; border-radius: 99px; }
.pal-foot {
  display: flex; align-items: center; gap: 14px;
  padding: 9px 14px; border-top: 1px solid var(--line-soft);
  font-size: 10.5px; color: var(--ink-faint);
}
.pal-foot span { display: inline-flex; align-items: center; gap: 5px; }

/* ==========================================================================
   Save sheet
   ========================================================================== */
#sheet { top: 8vh; width: min(760px, 94vw); border-radius: var(--r-lg); overflow: hidden;
  display: flex; flex-direction: column; max-height: 84vh; }
.sheet-head { padding: 17px 19px 15px; border-bottom: 1px solid var(--line-soft); }
.sheet-head h3 { margin: 0 0 4px; font-size: 16px; font-weight: 640; letter-spacing: -.02em; }
.sheet-head p { margin: 0; font-size: 12px; color: var(--ink-dim); }
.sheet-body { flex: 1 1 auto; overflow-y: auto; padding: 15px 19px; }
.sheet-foot {
  display: flex; align-items: center; gap: 9px;
  padding: 13px 19px; border-top: 1px solid var(--line-soft);
  background: rgba(0,0,0,.25);
}

.change {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 9px 0; border-bottom: 1px solid var(--line-soft);
}
.change:last-child { border-bottom: none; }
.change .k {
  font-size: 9px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase;
  padding: 3px 6px; border-radius: 5px; flex: none; margin-top: 1px; min-width: 52px; text-align: center;
}
.k.add { background: rgba(52,211,153,.16); color: #6ee7b7; }
.k.edit { background: rgba(96,165,250,.16); color: #93c5fd; }
.k.del { background: rgba(251,113,133,.16); color: #fda4af; }
.k.move { background: rgba(167,139,250,.16); color: #c4b5fd; }
.change .body { min-width: 0; flex: 1; }
.change .t { font-size: 12.5px; font-weight: 520; }
.change .d { font-size: 11px; color: var(--ink-dim); margin-top: 2px; line-height: 1.45; }
.change .d code { font-family: var(--mono); font-size: 10.5px; background: rgba(255,255,255,.07);
  padding: 1px 4px; border-radius: 4px; }

.issue { display: flex; gap: 9px; padding: 8px 10px; border-radius: 8px; margin-bottom: 6px; font-size: 11.5px; line-height: 1.45; }
.issue.error { background: rgba(251,113,133,.11); border: 1px solid rgba(251,113,133,.25); color: #fda4af; }
.issue.warn { background: rgba(251,191,36,.1); border: 1px solid rgba(251,191,36,.22); color: #fcd34d; }
.issue b { font-family: var(--mono); font-weight: 600; }

textarea.inp { height: auto; min-height: 62px; padding: 9px; resize: vertical; line-height: 1.5; font-size: 12.5px; }

/* ==========================================================================
   Toasts
   ========================================================================== */
#toasts {
  position: fixed; z-index: 120; left: 50%; bottom: 22px; transform: translateX(-50%);
  display: flex; flex-direction: column-reverse; gap: 8px; align-items: center;
  pointer-events: none;
}
.toast {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 15px; border-radius: 11px;
  background: rgba(16,18,26,.95); backdrop-filter: blur(18px);
  border: 1px solid var(--line); box-shadow: var(--shadow-lift);
  font-size: 12.5px; pointer-events: auto;
  animation: toast-in .32s var(--ease-out);
  max-width: 460px;
}
.toast.out { animation: toast-out .24s var(--ease) forwards; }
.toast .ic { width: 7px; height: 7px; border-radius: 99px; flex: none; }
.toast.ok .ic { background: var(--ok); box-shadow: 0 0 10px var(--ok); }
.toast.err .ic { background: var(--bad); box-shadow: 0 0 10px var(--bad); }
.toast.info .ic { background: var(--info); box-shadow: 0 0 10px var(--info); }
.toast button { color: var(--accent); font-weight: 600; font-size: 12px; margin-left: 4px; }
@keyframes toast-in { from { opacity: 0; transform: translateY(14px) scale(.96); } }
@keyframes toast-out { to { opacity: 0; transform: translateY(8px) scale(.97); } }

/* ==========================================================================
   Boot
   ========================================================================== */
#boot {
  position: fixed; inset: 0; z-index: 200;
  display: grid; place-items: center;
  background: var(--bg);
  transition: opacity .5s var(--ease), visibility .5s;
}
#boot.gone { opacity: 0; visibility: hidden; }
.boot-in { display: flex; flex-direction: column; align-items: center; gap: 18px; }
.boot-in .worm { animation: worm 1.7s var(--ease) infinite; }
@keyframes worm { 0%,100% { opacity: .35; } 50% { opacity: 1; } }
.boot-in p { margin: 0; font-size: 12px; color: var(--ink-faint); letter-spacing: .04em; }
.boot-bar { width: 180px; height: 2px; border-radius: 99px; background: rgba(255,255,255,.1); overflow: hidden; }
.boot-bar i { display: block; height: 100%; width: 38%; border-radius: 99px;
  background: linear-gradient(90deg, transparent, var(--info), transparent);
  animation: sweep 1.3s var(--ease) infinite; }
@keyframes sweep { from { transform: translateX(-100%); } to { transform: translateX(370%); } }

/* ==========================================================================
   Read-only
   Editing affordances are hidden rather than left to fail, so the UI never
   invites an edit it cannot keep.
   ========================================================================== */
body.read-only .strip-tools,
body.read-only .stop-side,
body.read-only #add-plat,
body.read-only #del-station,
body.read-only .tchip.add,
body.read-only .tchip .x { display: none !important; }

body.read-only .inp,
body.read-only .seg button,
body.read-only .mini-bullet { pointer-events: none; opacity: .75; }
body.read-only .inp { background: rgba(0,0,0,.24); border-style: dashed; }

body.read-only #branch-chip {
  background: rgba(251,191,36,.12);
  border-color: rgba(251,191,36,.3);
  color: #fcd34d;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}