/* ============================================================
   Spherical · Configurator — app styles
   Builds on ds/colors_and_type.css tokens.
   ============================================================ */

html, body { height: 100%; overflow: hidden; }
body {
  background: var(--bg-1);
  color: var(--fg-1);
  font-family: var(--font-sans);
}
*, *::before, *::after { box-sizing: border-box; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; padding: 0; color: inherit; }
input, select, textarea { font-family: inherit; }
a { color: inherit; }

/* ----- Top app bar ----- */
.app {
  display: grid;
  grid-template-rows: 56px 1fr 32px;
  height: 100vh;
  background: var(--bg-1);
}

.topbar {
  display: grid;
  grid-template-columns: 260px 1fr 320px;
  align-items: center;
  border-bottom: 1px solid var(--sph-black);
  padding: 0 20px 0 20px;
  background: var(--bg-1);
  position: relative;
  z-index: 3;
}
.topbar .brand {
  display: flex; align-items: center; gap: 12px;
}
.topbar .brand img { height: 18px; display: block; }
.topbar .brand .divider { width: 1px; height: 20px; background: var(--sph-black); opacity: 0.2; }
.topbar .brand .slug { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500; color: var(--fg-2); }

.topbar .progress {
  display: flex; justify-content: center; align-items: center;
}
.topbar .actions {
  display: flex; align-items: center; justify-content: flex-end; gap: 4px;
}
.topbar .actions .program {
  display: flex; flex-direction: column; align-items: flex-end; gap: 2px;
  padding-right: 12px; margin-right: 4px;
  border-right: 1px solid var(--stroke-2);
}
.topbar .actions .program .k { font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); }
.topbar .actions .program .v { font-size: 13px; font-weight: 500; }
.topbar .actions .iconbtn {
  width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid transparent;
}
.topbar .actions .iconbtn:hover { border-color: var(--sph-black); }
.topbar .actions .avatar {
  width: 28px; height: 28px; border-radius: 9999px; background: var(--sph-black); color: var(--sph-white);
  display: inline-flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 500;
  margin-left: 4px;
}

/* ----- Progress: 9-bar motif acting as step indicator ----- */
.steps9 {
  display: inline-flex; align-items: center; gap: 10px;
}
.steps9 .set {
  display: inline-flex; align-items: center; gap: 6px; height: 22px;
  cursor: pointer;
}
.steps9 .set i {
  display: block; background: var(--sph-n-300); height: 100%;
  transition: background var(--dur-s) var(--ease-standard);
}
.steps9 .set.done i { background: var(--sph-black); }
.steps9 .set.active i { background: var(--sph-black); }
.steps9 .set i:nth-child(1){ width: 2px; }
.steps9 .set i:nth-child(2){ width: 2px; }
.steps9 .set i:nth-child(3){ width: 3px; }
.steps9 .set i:nth-child(4){ width: 4px; }
.steps9 .set i:nth-child(5){ width: 7px; }
.steps9 .set i:nth-child(6){ width: 9px; }
.steps9 .set i:nth-child(7){ width: 12px; }
.steps9 .set i:nth-child(8){ width: 18px; }
.steps9 .set i:nth-child(9){ width: 22px; }
.steps9 .label {
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500;
  color: var(--fg-2);
}
.steps9 .label .cur { color: var(--sph-black); }
.steps9 .label .sep { margin: 0 8px; color: var(--fg-3); }

/* ----- Step rail ----- */
.stepbar {
  display: flex; align-items: stretch; border-bottom: 1px solid var(--sph-black);
  background: var(--bg-1); height: 44px; position: relative; z-index: 2;
}
.stepbar .step {
  flex: 1; display: flex; align-items: center; gap: 10px; padding: 0 16px;
  border-right: 1px solid var(--stroke-2);
  text-align: left; position: relative;
  transition: background var(--dur-s);
}
.stepbar .step:last-child { border-right: 0; }
.stepbar .step:hover:not(.active) { background: var(--bg-2); }
.stepbar .step .num {
  font-family: var(--font-mono); font-size: 10px; color: var(--fg-3);
  min-width: 22px;
}
.stepbar .step .name { font-size: 13px; font-weight: 500; color: var(--fg-2); }
.stepbar .step.done .num { color: var(--sph-black); }
.stepbar .step.done .name { color: var(--sph-black); }
.stepbar .step.done .name::after { content: " ✓"; color: var(--sph-n-500); font-weight: 400; }
.stepbar .step.active { background: var(--sph-yellow); }
.stepbar .step.active .num { color: var(--sph-black); }
.stepbar .step.active .name { color: var(--sph-black); }
.stepbar .step.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--sph-black);
}

/* ----- Status bar (bottom) ----- */
.statusbar {
  display: grid; grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-top: 1px solid var(--sph-black);
  background: var(--bg-1);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-2);
  padding: 0 16px;
  height: 32px;
}
.statusbar .left, .statusbar .right { display: flex; align-items: center; gap: 16px; }
.statusbar .right { justify-content: flex-end; }
.statusbar .sep { color: var(--fg-3); }
.statusbar .dot { width: 6px; height: 6px; background: var(--sph-ok); display: inline-block; }

/* ----- Body region ----- */
.stage {
  overflow: hidden;
  position: relative;
  background: var(--bg-1);
}

/* ----- Utility classes ----- */
.eyebrow {
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500;
  color: var(--fg-2);
}
.rule { border: 0; border-top: 1px solid var(--sph-black); margin: 0; }
.rule-hair { border: 0; border-top: 1px solid var(--stroke-2); margin: 0; }
.mono { font-family: var(--font-mono); }
.serif { font-family: var(--font-serif); }
.muted { color: var(--fg-2); }
.tnum { font-variant-numeric: tabular-nums; }

/* ----- Primary buttons ----- */
.btn {
  font: 500 13px/1 var(--font-sans); padding: 11px 18px;
  border: 1px solid var(--sph-black); background: var(--sph-white); color: var(--sph-black);
  display: inline-flex; align-items: center; gap: 10px;
  transition: background var(--dur-s), color var(--dur-s);
  letter-spacing: 0.01em;
}
.btn:hover { background: var(--sph-yellow); }
.btn.primary { background: var(--sph-black); color: var(--sph-white); }
.btn.primary:hover { background: var(--sph-n-700); }
.btn.ghost { border-color: transparent; }
.btn.ghost:hover { background: transparent; text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 4px; }
.btn.large { padding: 14px 22px; font-size: 14px; }
.btn.small { padding: 7px 12px; font-size: 12px; }
.btn[disabled] { color: var(--fg-muted); border-color: var(--stroke-3); cursor: not-allowed; background: var(--sph-white); }

/* ----- Badges ----- */
.badge {
  display: inline-flex; align-items: center; gap: 6px; padding: 3px 8px;
  font: 500 11px/1 var(--font-sans); letter-spacing: 0.02em;
  border: 1px solid currentColor;
}
.badge .dot { width: 6px; height: 6px; background: currentColor; display: inline-block; }
.b-ok   { color: var(--sph-ok); }
.b-warn { color: var(--sph-warn); }
.b-err  { color: var(--sph-err); }
.b-info { color: var(--sph-info); }
.b-ink  { color: var(--sph-black); }
.b-solid { background: var(--sph-black); color: var(--sph-white); border-color: var(--sph-black); }
.b-yellow { background: var(--sph-yellow); color: var(--sph-black); border-color: var(--sph-black); }

/* ----- Spec table ----- */
.spec-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.spec-table thead th {
  text-align: left; font-weight: 500; font-size: 10px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--fg-2);
  border-bottom: 1px solid var(--sph-black); padding: 10px 12px;
}
.spec-table td { padding: 10px 12px; border-bottom: 1px solid var(--stroke-2); vertical-align: top; }
.spec-table td.mono { font-family: var(--font-mono); color: var(--sph-n-700); font-size: 12px; }
.spec-table tr:hover td { background: var(--bg-2); }
.spec-table td.name { font-weight: 500; }

/* ----- Inputs ----- */
.field { display: flex; flex-direction: column; gap: 6px; }
.field > label { font-size: 11px; letter-spacing: 0.04em; font-weight: 500; color: var(--fg-2); text-transform: uppercase; }
.field input, .field select, .field textarea {
  font: 400 14px/1.2 var(--font-sans);
  padding: 10px 12px; background: var(--sph-white); border: 1px solid var(--sph-n-400);
  border-radius: 4px; color: var(--sph-black); outline: none;
  transition: border-color var(--dur-s), box-shadow var(--dur-s);
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--sph-black); box-shadow: 0 0 0 2px var(--sph-yellow-ink);
}
.field .hint { font-family: var(--font-mono); font-size: 11px; color: var(--fg-3); }

/* Segmented control */
.segmented {
  display: inline-flex; border: 1px solid var(--sph-black);
}
.segmented button {
  padding: 8px 14px; font-size: 12px; font-weight: 500;
  border-right: 1px solid var(--sph-black); color: var(--sph-black); background: var(--sph-white);
}
.segmented button:last-child { border-right: 0; }
.segmented button:hover { background: var(--bg-2); }
.segmented button.on { background: var(--sph-black); color: var(--sph-white); }

/* ----- Family tiles (Mission screen, top-of-flow) ----- */
.fam-tiles {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--sph-black); border: 1px solid var(--sph-black);
  max-width: 820px;
}
.fam-tile {
  background: var(--sph-white); text-align: left; padding: 18px 20px 20px;
  display: flex; flex-direction: column; gap: 10px; min-height: 148px;
  transition: background var(--dur-s);
  cursor: pointer; border: 0; font: inherit; color: inherit;
}
.fam-tile:hover { background: var(--bg-2); }
.fam-tile.on { background: var(--sph-yellow); }
.fam-tile-head {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 11px; color: var(--fg-2);
}
.fam-tile-code { font-size: 11px; letter-spacing: 0.04em; }
.fam-tile-check { font-size: 10px; color: var(--sph-black); }
.fam-tile-name { font-size: 16px; font-weight: 500; line-height: 1.25; }
.fam-tile-sum { font-size: 12px; line-height: 1.45; color: var(--fg-2); }
.fam-tile.on .fam-tile-sum { color: var(--sph-black); }

/* ----- Tick chooser ----- */
.chooser {
  display: grid; gap: 1px; background: var(--sph-black); border: 1px solid var(--sph-black);
}
.chooser .row { background: var(--sph-white); padding: 14px 18px; display: grid; grid-template-columns: 28px 1fr auto; align-items: center; gap: 16px; cursor: pointer; transition: background var(--dur-s); }
.chooser .row:hover { background: var(--bg-2); }
.chooser .row.on { background: var(--sph-yellow); }
.chooser .row .check {
  width: 16px; height: 16px; border: 1px solid var(--sph-black); display: inline-block; position: relative;
}
.chooser .row.on .check::after {
  content: ""; position: absolute; inset: 3px; background: var(--sph-black);
}
.chooser .row .title { font-size: 15px; font-weight: 500; }
.chooser .row .sub { font-size: 12px; color: var(--fg-2); margin-top: 2px; font-family: var(--font-mono); }
.chooser .row .tail { font-family: var(--font-mono); font-size: 11px; color: var(--fg-2); text-align: right; }

/* ----- Schematic canvas ----- */
.canvas-wrap {
  position: relative;
  background:
    linear-gradient(to right, var(--stroke-2) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(to bottom, var(--stroke-2) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--bg-2);
  border-right: 1px solid var(--sph-black);
  overflow: hidden;
}
.canvas-wrap .corner {
  position: absolute;
  font-family: var(--font-mono); font-size: 10px; color: var(--fg-3);
  padding: 8px 10px;
}
.canvas-wrap .corner.tl { top: 0; left: 0; }
.canvas-wrap .corner.tr { top: 0; right: 0; text-align: right; }
.canvas-wrap .corner.bl { bottom: 0; left: 0; }
.canvas-wrap .corner.br { bottom: 0; right: 0; text-align: right; }

.block {
  position: absolute;
  border: 1px solid var(--sph-black);
  background: var(--sph-white);
  padding: 10px 12px;
  cursor: pointer;
  transition: background var(--dur-s), box-shadow var(--dur-s), transform var(--dur-s);
  display: flex; flex-direction: column; gap: 4px;
  min-width: 120px;
}
.block:hover { background: var(--sph-yellow); }
.block.selected { background: var(--sph-black); color: var(--sph-white); }
.block.selected .meta { color: var(--sph-n-300); }
.block.warn { box-shadow: inset 0 0 0 1px var(--sph-warn); }
.block .tag { font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase; font-weight: 500; color: var(--fg-2); }
.block.selected .tag { color: var(--sph-n-300); }
.block .name { font-size: 13px; font-weight: 500; }
.block .meta { font-family: var(--font-mono); font-size: 10px; color: var(--fg-2); }

/* Connection port */
.port {
  position: absolute; width: 6px; height: 6px; background: var(--sph-black);
  border-radius: 9999px;
}

/* ----- Right inspector rail ----- */
.inspector {
  background: var(--bg-1);
  border-left: 1px solid var(--sph-black);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.inspector .ihead {
  padding: 14px 18px; border-bottom: 1px solid var(--sph-black);
  display: flex; justify-content: space-between; align-items: baseline;
}
.inspector .ihead h4 { font-size: 14px; font-weight: 500; margin: 0; }
.inspector .ihead .kbd {
  font-family: var(--font-mono); font-size: 10px; color: var(--fg-3);
  padding: 2px 6px; border: 1px solid var(--stroke-3);
}
.inspector .ibody { padding: 18px; overflow: auto; flex: 1; }
.inspector .group { margin-bottom: 22px; }
.inspector .group:last-child { margin-bottom: 0; }
.inspector .group > .ghead {
  font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500;
  color: var(--fg-2); margin-bottom: 10px; padding-bottom: 6px; border-bottom: 1px solid var(--stroke-2);
}

/* param grid */
.param-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
.param-grid .row { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center; font-size: 13px; }
.param-grid .row .k { color: var(--fg-2); }
.param-grid .row .v { font-family: var(--font-mono); font-size: 12px; }

/* Range/number inline */
.inline-edit {
  display: flex; align-items: center; gap: 6px;
}
.inline-edit input[type="number"] {
  width: 64px; font-family: var(--font-mono); font-size: 12px; padding: 4px 6px;
  border: 1px solid var(--stroke-3); border-radius: 0; text-align: right;
}
.inline-edit input[type="number"]:focus { border-color: var(--sph-black); outline: none; }
.inline-edit .unit { font-family: var(--font-mono); font-size: 11px; color: var(--fg-3); }

/* Toggle switch - square, Swiss */
.toggle {
  width: 32px; height: 18px; border: 1px solid var(--sph-black); position: relative; cursor: pointer;
  background: var(--sph-white);
}
.toggle::after {
  content: ""; position: absolute; top: 2px; left: 2px; width: 12px; height: 12px;
  background: var(--sph-black); transition: left var(--dur-s);
}
.toggle.on { background: var(--sph-yellow); }
.toggle.on::after { left: 16px; }

/* ----- Scroll nicety ----- */
.scroll { overflow: auto; }
.scroll::-webkit-scrollbar { width: 10px; height: 10px; }
.scroll::-webkit-scrollbar-thumb { background: var(--sph-n-300); }
.scroll::-webkit-scrollbar-thumb:hover { background: var(--sph-n-400); }

/* ----- Fade transitions between screens ----- */
.screen-enter { animation: fade 240ms var(--ease-standard); }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

/* ----- Tweaks panel ----- */
.tweaks {
  position: fixed; right: 20px; bottom: 52px; width: 300px;
  background: var(--sph-white); border: 1px solid var(--sph-black);
  box-shadow: var(--shadow-3);
  z-index: 40;
  display: none;
  font-size: 13px;
}
.tweaks.on { display: block; }
.tweaks .th { padding: 12px 14px; border-bottom: 1px solid var(--sph-black); display: flex; justify-content: space-between; align-items: center; }
.tweaks .th h5 { margin: 0; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500; }
.tweaks .tb { padding: 14px; display: flex; flex-direction: column; gap: 14px; }
.tweaks .tb .trow { display: grid; grid-template-columns: 1fr; gap: 6px; }
.tweaks .tb .trow > .k { font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-2); font-weight: 500; }

/* ----- Dark mode surface ----- */
.dark {
  --bg-1: var(--sph-n-900);
  --bg-2: var(--sph-n-800);
  --bg-3: var(--sph-n-700);
  --fg-1: var(--sph-white);
  --fg-2: var(--sph-n-300);
  --fg-3: var(--sph-n-400);
  --stroke-1: var(--sph-white);
  --stroke-2: var(--sph-n-700);
  --stroke-3: var(--sph-n-600);
  color-scheme: dark;
}
.dark .topbar, .dark .stepbar, .dark .statusbar, .dark .inspector { border-color: var(--sph-white); }
.dark .stepbar .step.active { background: var(--sph-yellow-ink); color: var(--sph-black); }
.dark .stepbar .step.active .num, .dark .stepbar .step.active .name { color: var(--sph-black); }
.dark .chooser { background: var(--sph-white); border-color: var(--sph-white); }
.dark .chooser .row { background: var(--sph-n-900); color: var(--sph-white); }
.dark .chooser .row.on { background: var(--sph-yellow-ink); color: var(--sph-black); }
.dark .btn { background: transparent; color: var(--sph-white); border-color: var(--sph-white); }
.dark .btn.primary { background: var(--sph-white); color: var(--sph-black); }
.dark .btn:hover { background: var(--sph-yellow-ink); color: var(--sph-black); }
.dark .block { background: var(--sph-n-900); color: var(--sph-white); border-color: var(--sph-white); }
.dark .block:hover { background: var(--sph-yellow-ink); color: var(--sph-black); }
.dark .block.selected { background: var(--sph-white); color: var(--sph-black); }
.dark .canvas-wrap {
  background:
    linear-gradient(to right, var(--sph-n-700) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(to bottom, var(--sph-n-700) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--sph-n-900);
}
.dark .toggle { background: var(--sph-n-800); border-color: var(--sph-white); }
.dark .toggle::after { background: var(--sph-white); }
.dark .toggle.on { background: var(--sph-yellow-ink); }
.dark .toggle.on::after { background: var(--sph-black); }
.dark .field input, .dark .field select, .dark .field textarea {
  background: var(--sph-n-900); color: var(--sph-white); border-color: var(--sph-n-500);
}
.dark .segmented { border-color: var(--sph-white); }
.dark .segmented button { background: transparent; color: var(--sph-white); border-right-color: var(--sph-white); }
.dark .segmented button.on { background: var(--sph-white); color: var(--sph-black); }
.dark ::selection { background: var(--sph-yellow-ink); color: var(--sph-black); }
.dark .logo-invert { filter: invert(1); }

/* ----- Dense mode ----- */
.dense .chooser .row { padding: 10px 14px; }
.dense .spec-table td { padding: 6px 10px; }
.dense .stepbar { height: 36px; }
.dense .inspector .ibody { padding: 14px; }


/* ============================================================
   Configure screen — 2-col form + diagram
   ============================================================ */

.cfg-root {
  display: grid;
  grid-template-columns: minmax(520px, 1fr) minmax(560px, 1.15fr);
  height: 100%;
  background: var(--bg-1);
}

.cfg-form {
  border-right: 1px solid var(--sph-black);
  overflow-y: auto;
  padding: 28px 36px 80px;
}

.cfg-head {
  padding-bottom: 20px;
  border-bottom: 1px solid var(--sph-black);
  margin-bottom: 8px;
}

.cfg-section {
  padding: 22px 0 8px;
  border-bottom: 1px solid var(--stroke-2);
}
.cfg-section:last-of-type { border-bottom: 0; }
.cfg-section-head {
  display: flex; align-items: baseline; gap: 14px;
  margin-bottom: 14px;
}
.cfg-section-num {
  font-family: var(--font-mono); font-size: 11px; color: var(--fg-3);
  letter-spacing: 0.08em;
}
.cfg-section-head h4 {
  font-size: 15px; font-weight: 500; letter-spacing: -0.005em; margin: 0;
}

.cfg-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  padding: 12px 0;
  align-items: flex-start;
}
.cfg-label-title { font-size: 13px; font-weight: 500; }
.cfg-label-hint {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--fg-3); margin-top: 4px; line-height: 1.4;
}
.cfg-control { min-width: 0; }

/* Segmented radio group (Seg) */
.cfg-seg {
  display: grid; gap: 6px;
  grid-template-columns: repeat(2, 1fr);
}
.cfg-seg button {
  text-align: left; padding: 10px 12px;
  background: var(--sph-white); color: var(--sph-black);
  border: 1px solid var(--sph-n-300);
  transition: border-color var(--dur-s), background var(--dur-s);
  display: flex; flex-direction: column; gap: 3px;
  min-height: 48px;
}
.cfg-seg button:hover { border-color: var(--sph-black); }
.cfg-seg button.on {
  background: var(--sph-yellow); border-color: var(--sph-black);
}
.cfg-seg button .n { font-size: 13px; font-weight: 500; }
.cfg-seg button .s {
  font-family: var(--font-mono); font-size: 10px; color: var(--fg-3);
  letter-spacing: 0.02em;
}
.cfg-seg button.on .s { color: var(--sph-black); }

/* 2-option pill */
.cfg-seg2 {
  display: inline-flex; border: 1px solid var(--sph-black);
}
.cfg-seg2 button {
  flex: 1; padding: 10px 14px; font-size: 13px; font-weight: 500;
  background: var(--sph-white); color: var(--sph-black);
  border-right: 1px solid var(--sph-black);
}
.cfg-seg2 button:last-child { border-right: 0; }
.cfg-seg2 button.on { background: var(--sph-black); color: var(--sph-white); }

/* Stepper */
.cfg-stepper {
  display: inline-grid; grid-template-columns: 34px 1fr 34px;
  align-items: stretch; border: 1px solid var(--sph-black);
  height: 42px; min-width: 108px;
}
.cfg-stepper button {
  background: var(--sph-white); font-size: 16px; font-weight: 500;
  color: var(--sph-black); line-height: 1;
}
.cfg-stepper button:hover { background: var(--sph-yellow); }
.cfg-stepper .val {
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 500;
  border-left: 1px solid var(--sph-black);
  border-right: 1px solid var(--sph-black);
  background: var(--bg-2);
}
.cfg-stepper .sfx {
  font-size: 10px; color: var(--fg-3); margin-left: 4px;
  letter-spacing: 0.05em;
}

/* Slider */
.cfg-slider {
  display: grid; grid-template-columns: 1fr 96px;
  gap: 18px; align-items: center;
}
.cfg-slider input[type=range] {
  -webkit-appearance: none; appearance: none;
  background: transparent; height: 24px;
}
.cfg-slider input[type=range]::-webkit-slider-runnable-track {
  height: 2px; background: var(--sph-black);
}
.cfg-slider input[type=range]::-moz-range-track {
  height: 2px; background: var(--sph-black);
}
.cfg-slider input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 14px; height: 14px; background: var(--sph-black);
  margin-top: -6px; border: 2px solid var(--sph-white);
  box-shadow: 0 0 0 1px var(--sph-black);
}
.cfg-slider input[type=range]::-moz-range-thumb {
  width: 14px; height: 14px; background: var(--sph-black);
  border: 2px solid var(--sph-white); box-shadow: 0 0 0 1px var(--sph-black);
  border-radius: 0;
}
.cfg-slider .val {
  text-align: right; font-size: 14px; font-weight: 500;
}
.cfg-slider .val .unit { color: var(--fg-3); font-weight: 400; margin-left: 2px; font-size: 12px; }

/* Toggle */
.cfg-toggle {
  display: inline-flex; align-items: center; gap: 10px;
  background: transparent; color: var(--sph-black);
  font-size: 13px; font-weight: 500;
  padding: 6px 4px;
}
.cfg-toggle .pill {
  width: 34px; height: 18px; background: var(--sph-n-300);
  border: 1px solid var(--sph-black); position: relative;
  transition: background var(--dur-s);
}
.cfg-toggle .knob {
  position: absolute; top: 1px; left: 1px;
  width: 14px; height: 14px; background: var(--sph-white);
  border: 1px solid var(--sph-black);
  transition: transform var(--dur-s);
}
.cfg-toggle.on .pill { background: var(--sph-yellow); }
.cfg-toggle.on .knob { transform: translateX(16px); background: var(--sph-black); border-color: var(--sph-black); }

/* Right pane */
.cfg-right {
  display: grid;
  grid-template-rows: 1fr auto auto;
  min-width: 0;
  background:
    linear-gradient(to right, rgba(0,0,0,0.04) 1px, transparent 1px) 0 0 / 20px 20px,
    linear-gradient(to bottom, rgba(0,0,0,0.04) 1px, transparent 1px) 0 0 / 20px 20px,
    var(--bg-1);
}

.cfg-right-diag {
  overflow: auto;
  position: relative;
  padding: 20px;
}

.cfg-right-metrics {
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--sph-black);
  background: var(--bg-1);
}
.cfg-metric {
  padding: 18px 22px;
  border-right: 1px solid var(--stroke-2);
}
.cfg-metric:last-child { border-right: 0; }
.cfg-metric .k {
  font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--fg-2); font-weight: 500;
}
.cfg-metric .v {
  font-size: 32px; font-weight: 500; letter-spacing: -0.02em;
  margin-top: 6px; line-height: 1;
}
.cfg-metric .v .u { font-size: 16px; color: var(--fg-2); margin-left: 2px; font-weight: 400; }
.cfg-metric .sub {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--fg-3); letter-spacing: 0.04em; margin-top: 6px;
}

.cfg-right-cta {
  display: flex; gap: 10px; padding: 16px 20px;
  border-top: 1px solid var(--sph-black);
  background: var(--bg-1);
}

/* Diagram */
.cfg-diagram { font-family: var(--font-sans); }
.cfg-dhud {
  position: absolute; z-index: 2; font-family: var(--font-mono);
  font-size: 10px; color: var(--fg-3); letter-spacing: 0.06em;
  text-transform: uppercase; padding: 4px 8px;
  pointer-events: none;
}
.cfg-dhud.tl { top: 6px; left: 10px; }
.cfg-dhud.tr { top: 6px; right: 10px; }
.cfg-dhud.br { bottom: 6px; right: 10px; }
.cfg-dworld { margin-top: 24px; }

.cfg-zone-header {
  position: absolute;
  font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
  font-weight: 500; color: var(--fg-2);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--sph-n-300);
}
.cfg-zone-header .idx {
  display: inline-block; width: 16px; height: 16px;
  border: 1px solid var(--sph-black);
  font-family: var(--font-mono);
  text-align: center; line-height: 14px;
  margin-right: 8px; font-size: 10px;
  color: var(--sph-black);
}

.cfg-wire {
  stroke: var(--sph-black); stroke-width: 1.25; fill: none;
  opacity: 0.7;
}
.cfg-wire-ctrl  { stroke: var(--sph-black); stroke-width: 1.25; }
.cfg-wire-power { stroke: var(--sph-black); stroke-width: 2; opacity: 0.9; }
.cfg-wire-sense { stroke: var(--sph-n-500); stroke-width: 1; stroke-dasharray: 4 3; opacity: 0.8; }

.cfg-block {
  position: absolute;
  background: var(--sph-white);
  border: 1px solid var(--sph-black);
  padding: 10px 12px;
  display: flex; flex-direction: column; gap: 4px;
  transition: background 400ms var(--ease-standard), transform 300ms var(--ease-standard), opacity 300ms var(--ease-standard);
}
.cfg-zone-ctrl   { background: var(--sph-white); }
.cfg-zone-bridge { background: #fdf7e0; }             /* subtle highlight for bridge blocks */
.cfg-zone-pwr    { background: var(--sph-white); box-shadow: 2px 2px 0 var(--sph-n-300); }
.cfg-block .tag {
  font-size: 9px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--fg-3);
}
.cfg-block .ttl { font-size: 13px; font-weight: 500; letter-spacing: -0.005em; }
.cfg-block .sub {
  font-size: 10.5px; color: var(--fg-2);
  letter-spacing: 0.02em; line-height: 1.35;
}

@keyframes cfg-newborn {
  0%   { opacity: 0; transform: translateY(6px) scale(0.94); }
  60%  { opacity: 1; transform: translateY(0) scale(1.03); background: var(--sph-yellow); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}
.cfg-block.newborn {
  animation: cfg-newborn 520ms var(--ease-standard);
}

@keyframes cfg-tint {
  0%   { background: var(--sph-white); }
  40%  { background: var(--sph-yellow); }
  100% { background: var(--sph-white); }
}
.cfg-block.tint {
  animation: cfg-tint 700ms var(--ease-standard);
}
.cfg-block.big.tint {
  animation: cfg-tint 700ms var(--ease-standard);
}

/* Dark mode */
.dark .cfg-form { border-color: var(--sph-white); }
.dark .cfg-head { border-color: var(--sph-white); }
.dark .cfg-section { border-color: var(--sph-n-700); }
.dark .cfg-seg button { background: var(--sph-n-900); color: var(--sph-white); border-color: var(--sph-n-500); }
.dark .cfg-seg button.on { background: var(--sph-yellow-ink); border-color: var(--sph-white); color: var(--sph-black); }
.dark .cfg-seg2 { border-color: var(--sph-white); }
.dark .cfg-seg2 button { background: var(--sph-n-900); color: var(--sph-white); border-color: var(--sph-white); }
.dark .cfg-seg2 button.on { background: var(--sph-white); color: var(--sph-black); }
.dark .cfg-stepper { border-color: var(--sph-white); }
.dark .cfg-stepper button { background: var(--sph-n-900); color: var(--sph-white); }
.dark .cfg-stepper .val { background: var(--sph-n-800); border-color: var(--sph-white); color: var(--sph-white); }
.dark .cfg-slider input[type=range]::-webkit-slider-runnable-track { background: var(--sph-white); }
.dark .cfg-slider input[type=range]::-webkit-slider-thumb { background: var(--sph-white); border-color: var(--sph-n-900); box-shadow: 0 0 0 1px var(--sph-white); }
.dark .cfg-toggle { color: var(--sph-white); }
.dark .cfg-toggle .pill { background: var(--sph-n-700); border-color: var(--sph-white); }
.dark .cfg-toggle .knob { background: var(--sph-white); border-color: var(--sph-white); }
.dark .cfg-toggle.on .pill { background: var(--sph-yellow-ink); }
.dark .cfg-right { background: var(--sph-n-900); }
.dark .cfg-right-metrics, .dark .cfg-right-cta { background: var(--sph-n-900); border-color: var(--sph-white); }
.dark .cfg-metric { border-color: var(--sph-n-700); }
.dark .cfg-wire { stroke: var(--sph-white); }
.dark .cfg-block { background: var(--sph-n-900); color: var(--sph-white); border-color: var(--sph-white); }
.dark .cfg-zone-bridge { background: var(--sph-n-800); }
.dark .cfg-zone-pwr { box-shadow: 2px 2px 0 var(--sph-n-600); }
.dark .cfg-zone-header { color: var(--sph-n-300); border-color: var(--sph-n-700); }
.dark .cfg-zone-header .idx { border-color: var(--sph-white); color: var(--sph-white); }
.dark .cfg-wire-sense { stroke: var(--sph-n-400); }

/* Scroll helper already defined elsewhere; keep fallback */
.scroll { overflow-y: auto; }

/* ----- Tweaks toggle button ----- */
.tweaks-toggle {
  position: fixed; right: 20px; bottom: 44px;
  padding: 6px 12px;
  font: 500 10px/1 var(--font-sans);
  letter-spacing: 0.08em; text-transform: uppercase;
  background: var(--sph-white); color: var(--sph-black);
  border: 1px solid var(--sph-black);
  z-index: 39;
}
.tweaks-toggle:hover { background: var(--sph-yellow); }
.dark .tweaks-toggle { background: var(--sph-n-900); color: var(--sph-white); border-color: var(--sph-white); }