/* Tira-Troncos — Family Brass theme (style tokens copied from FromForty / PowerCurve so
   this tool stays self-contained). Carbon background, brass borders, Segoe UI body,
   Orbitron for the app title only, lime-on-brass primary buttons, cyan focus rings. */
:root {
  --bg: #050607;
  --bg-deep: #030405;
  --carbon: #0c1016;
  --carbon-raised: #12171f;
  --carbon-input: rgba(4, 6, 9, 0.88);
  --brass: rgba(215, 196, 160, 0.42);
  --brass-light: #e8d7b0;
  --brass-mid: #d4b889;
  --brass-dim: rgba(215, 196, 160, 0.42);
  --brass-soft: rgba(240, 226, 196, 0.22);
  --brass-inset: rgba(106, 87, 56, 0.35);
  --ink: #f4f7fb;
  --muted: #9aa6b8;
  --blue: #7ec8ee;
  --blue-soft: rgba(76, 201, 240, 0.16);
  --green: #b6f27a;
  --lime: #c8ff4a;
  --accent: #4cc9f0;
  --yellow: #e8cf6a;
  --red: #ff6b7d;
  --mono: ui-monospace, "Cascadia Code", Consolas, "Courier New", monospace;
  --sans: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --brass-face:
    linear-gradient(145deg, rgba(240, 226, 196, 0.12), transparent 38%),
    linear-gradient(165deg, rgba(255, 255, 255, 0.04) 0%, transparent 45%),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.025) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(-45deg, rgba(0,0,0,0.25) 0 1px, transparent 1px 3px),
    #12171f;
  --brass-shadow:
    inset 0 0 0 1px rgba(240, 226, 196, 0.22),
    inset 0 0 0 3px rgba(106, 87, 56, 0.35),
    inset 0 0 28px rgba(0, 0, 0, 0.35),
    0 12px 36px rgba(0, 0, 0, 0.45);
  --btn-brass-rim:
    inset 0 0 0 1px rgba(240, 226, 196, 0.22),
    inset 0 0 0 2px rgba(106, 87, 56, 0.35),
    inset 0 1px 0 rgba(255, 246, 224, 0.12),
    0 4px 14px rgba(0, 0, 0, 0.4);
  --focus-ring: 0 0 0 2px #050607, 0 0 0 4px rgba(76, 201, 240, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background-color: var(--bg);
  color: var(--ink);
  font: 14px/1.4 var(--sans);
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 12px 14px 28px;
  background-color: var(--bg);
  background-image:
    radial-gradient(1100px 520px at 50% -8%, rgba(76, 201, 240, 0.08), transparent 58%),
    radial-gradient(800px 480px at 92% 88%, rgba(200, 255, 74, 0.04), transparent 52%),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.028) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(-45deg, rgba(0,0,0,0.28) 0 1px, transparent 1px 3px),
    linear-gradient(180deg, #0b0e13 0%, #050607 42%, #030405 100%);
  background-attachment: fixed;
}

/* ---------- header (same layout as FromForty: suite links | title | actions) ---------- */
.top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  grid-template-areas: "nav brand actions";
  align-items: center;
  gap: 16px;
  margin: 0;
  padding: 12px 16px;
  border: 1px solid var(--brass-dim);
  border-radius: 14px;
  background: var(--brass-face);
  box-shadow: var(--brass-shadow);
}
.site-nav {
  grid-area: nav;
  justify-self: start;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 8px 10px;
  border: 1px solid var(--brass-dim);
  border-radius: 12px;
  background:
    linear-gradient(145deg, rgba(240, 226, 196, 0.10), transparent 40%),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.025) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(-45deg, rgba(0,0,0,0.25) 0 1px, transparent 1px 3px),
    rgba(12, 16, 22, 0.92);
  box-shadow: inset 0 0 0 1px rgba(240, 226, 196, 0.22), inset 0 0 0 2px var(--brass-inset), 0 8px 22px rgba(0, 0, 0, 0.35);
}
.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0.3rem 0.7rem;
  border-radius: 8px;
  border: 1px solid transparent;
  color: #b0b8c4;
  background: rgba(4, 6, 9, 0.45);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
}
.site-nav a:hover { color: var(--brass-light); border-color: var(--brass-dim); }
.site-nav a:focus-visible { outline: none; box-shadow: var(--focus-ring); }

.brand-block { grid-area: brand; justify-self: center; text-align: center; }
.mark {
  margin: 0;
  color: var(--brass-light);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
h1 {
  margin: 3px 0 0;
  color: var(--ink);
  font-family: "Orbitron", var(--sans);
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1;
}
.top-actions { grid-area: actions; justify-self: end; display: flex; gap: 10px; flex-wrap: wrap; }

.driver-line { margin: 0; color: var(--muted); font-size: 13px; text-align: center; }

/* ---------- buttons ---------- */
.btn {
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 9px;
  border: 1px solid var(--brass-dim);
  font: 800 13px/1 var(--sans);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  color: var(--brass-light);
  background: linear-gradient(180deg, rgba(255, 246, 224, 0.08), transparent 40%), #141820;
  box-shadow: var(--btn-brass-rim);
  transition: filter .15s, border-color .15s, color .15s, transform .05s;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible, button:focus-visible, summary:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.btn.ghost:hover { border-color: var(--brass-light); color: var(--ink); }
.btn.primary {
  border: none;
  color: var(--lime);
  background:
    linear-gradient(180deg, rgba(200, 255, 74, 0.22), transparent 40%),
    linear-gradient(145deg, rgba(240, 226, 196, 0.12), transparent 42%),
    #1a2210;
  box-shadow: var(--btn-brass-rim), 0 0 18px rgba(200, 255, 74, 0.28);
}
.btn.primary:hover {
  filter: brightness(1.08);
  background:
    linear-gradient(180deg, rgba(200, 255, 74, 0.30), transparent 42%),
    linear-gradient(145deg, rgba(240, 226, 196, 0.16), transparent 42%),
    #1e2812;
}
.btn.primary:focus-visible { box-shadow: var(--btn-brass-rim), var(--focus-ring); }
.btn.small { min-height: 36px; padding: 6px 12px; font-size: 11.5px; }
.btn.danger { border-color: rgba(255, 107, 125, 0.55); color: #ffd5da; }
.btn.danger:hover { border-color: var(--red); color: #fff1f3; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.disclaimer {
  margin: 0;
  padding: 10px 14px;
  border: 1px solid rgba(255, 107, 125, 0.45);
  border-left: 4px solid var(--red);
  border-radius: 12px;
  background: rgba(255, 107, 125, 0.07);
  color: #f6d9dd;
  font-size: 13px;
}
.disclaimer strong { color: #ffd5da; }

/* ---------- layout + cards ---------- */
.layout { display: grid; grid-template-columns: 350px minmax(0, 1fr); gap: 12px; align-items: start; }
.panel { display: flex; flex-direction: column; gap: 12px; }
.card {
  padding: 12px 14px 14px;
  border: 1px solid var(--brass-dim);
  border-radius: 14px;
  background: var(--brass-face);
  box-shadow: var(--brass-shadow);
}
.card h2 {
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(215, 196, 160, 0.22);
  color: var(--brass-light);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.hint { margin: 8px 0 0; color: var(--muted); font-size: 12.5px; }
.hint.caution { color: var(--yellow); }
.hint.caution:empty { display: none; }
.hidden { display: none; }

/* ---------- templates + manual ratio ---------- */
.preset-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.preset-btn {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2px 6px;
  align-content: start;
  min-height: 64px;
  padding: 7px 9px 8px;
  border-radius: 10px;
  border: 1px solid rgba(215, 196, 160, 0.24);
  background: rgba(4, 6, 9, 0.55);
  box-shadow: inset 0 1px 0 rgba(255, 246, 224, 0.05);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  font-family: var(--sans);
}
.preset-btn:hover { border-color: var(--brass-dim); }
.preset-btn .pr-name { font-weight: 800; font-size: 13px; color: var(--brass-light); }
.preset-btn .pr-ma { font: 800 11px/1.5 var(--mono); color: var(--muted); }
.preset-btn .pr-desc { grid-column: 1 / -1; font-size: 11px; line-height: 1.3; color: var(--muted); }
.preset-btn.active {
  border-color: rgba(200, 255, 74, 0.55);
  background: linear-gradient(160deg, rgba(200, 255, 74, 0.10), transparent 62%), rgba(8, 12, 10, 0.72);
  box-shadow: inset 0 0 0 1px rgba(200, 255, 74, 0.18), 0 0 14px rgba(200, 255, 74, 0.12);
}
.preset-btn.active .pr-name, .preset-btn.active .pr-ma { color: var(--lime); }
.preset-desc b { color: var(--ink); }

.ratio-box {
  margin-top: 12px;
  padding: 10px 11px 11px;
  border: 1px solid rgba(215, 196, 160, 0.24);
  border-radius: 10px;
  background: rgba(4, 6, 9, 0.55);
}
.ratio-box h3 { margin: 0 0 8px; color: var(--brass-light); font-size: 11px; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; }
.ratio-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: end; }
.ratio-field { display: flex; flex-direction: column; gap: 4px; color: var(--muted); font-size: 12px; font-weight: 600; }
.ratio-row .btn { min-width: 92px; }
.check { display: flex; align-items: center; gap: 8px; margin-top: 9px; color: var(--muted); font-size: 12.5px; cursor: pointer; }
.check input { width: 18px; height: 18px; accent-color: var(--brass-mid); }
.ratio-msg { margin: 8px 0 0; font-size: 12.5px; color: var(--muted); }
.ratio-msg:empty { display: none; }
.ratio-msg.ok { color: var(--green); }
.ratio-msg.warn { color: var(--yellow); }
.ratio-msg.bad { color: var(--red); }

/* ---------- fields ---------- */
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.fields label, .slider-label { display: flex; flex-direction: column; gap: 4px; color: var(--muted); font-size: 12px; font-weight: 600; }
.fields input, .fields select, .insp-fields input, .insp-fields select, .ratio-field input {
  width: 100%;
  min-height: 42px;
  padding: 8px 10px;
  border-radius: 9px;
  border: 1px solid rgba(180, 200, 230, 0.16);
  background: var(--carbon-input);
  color: var(--ink);
  font: 700 16px/1 var(--mono);
}
.fields select, .insp-fields select { font: 700 14px/1.2 var(--sans); appearance: auto; }
.fields .span2, .insp-fields .span2 { grid-column: 1 / -1; }
input:focus, select:focus,
.fields input:focus, .fields select:focus, .insp-fields input:focus, .insp-fields select:focus, .ratio-field input:focus, .layer-table input:focus {
  outline: none;
  border-color: rgba(76, 201, 240, 0.55);
  box-shadow: var(--focus-ring);
}
input::placeholder { color: #607078; }
.calc {
  display: flex; align-items: center; min-height: 42px; padding: 8px 10px; border-radius: 9px;
  border: 1px dashed rgba(215, 196, 160, 0.35); background: rgba(212, 184, 137, 0.06);
  color: var(--brass-light); font: 800 16px/1 var(--mono);
}
.slider-label { margin-top: 4px; }
.slider-row { display: flex; align-items: center; gap: 10px; }
.slider-row input[type=range] { flex: 1; accent-color: var(--brass-mid); height: 30px; }
.slider-row input[type=range]:focus { box-shadow: none; outline: 2px solid rgba(76, 201, 240, 0.55); outline-offset: 2px; border-radius: 6px; }
.slider-row output { min-width: 48px; text-align: right; color: var(--lime); font: 700 15px var(--mono); }
.row-actions { display: flex; gap: 8px; margin-top: 8px; }

/* ---------- results ---------- */
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 0; }
.stats > div {
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(4, 6, 9, 0.55);
  border: 1px solid rgba(215, 196, 160, 0.24);
  box-shadow: inset 0 1px 0 rgba(255, 246, 224, 0.05);
}
.stats > div:last-child { grid-column: 1 / -1; }
.stats dt { color: var(--muted); font-size: 10.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.stats dd { margin: 2px 0 0; font: 800 18px/1.2 var(--mono); color: var(--ink); }
.stats dd.accent { color: var(--lime); font-size: 22px; }
.stats dd.ok { color: var(--green); }
.stats dd.warn { color: var(--yellow); }
.stats dd.bad { color: var(--red); }
.stats dd small { font-size: 12px; color: var(--muted); font-weight: 600; }

.comp-list { list-style: none; margin: 10px 0 0; padding: 0; display: flex; flex-direction: column; gap: 5px; }
.comp-list li {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2px 8px;
  padding: 7px 10px;
  border-radius: 8px;
  background: rgba(4, 6, 9, 0.6);
  border-left: 4px solid var(--green);
  font-size: 13px;
}
.comp-list li.warn { border-left-color: var(--yellow); }
.comp-list li.bad { border-left-color: var(--red); background: rgba(255, 107, 125, 0.10); }
.comp-list li.info { border-left-color: var(--accent); }
.comp-list .nm { font-weight: 700; }
.comp-list .val { font: 700 13px var(--mono); text-align: right; }
.comp-list .sub { grid-column: 1 / -1; color: var(--muted); font-size: 11.5px; }

.banner { margin: 0 0 10px; padding: 9px 11px; border-radius: 9px; font-size: 13px; font-weight: 600; }
.banner-bad { background: rgba(255, 107, 125, 0.12); border: 1px solid rgba(255, 107, 125, 0.55); color: #ffd5da; }
.banner-ok { background: rgba(200, 255, 74, 0.08); border: 1px solid rgba(200, 255, 74, 0.40); color: #e4fbc4; }
.banner-warn { background: rgba(232, 207, 106, 0.10); border: 1px solid rgba(232, 207, 106, 0.45); color: #f7ecc0; }

.layer-table { width: 100%; margin-top: 10px; border-collapse: separate; border-spacing: 0 4px; font-size: 12.5px; }
.layer-table th { color: var(--muted); font-size: 10.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; text-align: left; padding: 0 6px; }
.layer-table td { padding: 2px 6px; background: rgba(4, 6, 9, 0.6); }
.layer-table td:first-child { border-radius: 8px 0 0 8px; font: 800 14px var(--mono); color: var(--muted); width: 3.5em; }
.layer-table td:last-child { border-radius: 0 8px 8px 0; color: var(--muted); font-size: 11.5px; }
.layer-table input {
  width: 100%; min-height: 34px; padding: 4px 8px; border-radius: 7px;
  border: 1px solid rgba(180, 200, 230, 0.16); background: var(--carbon-input); color: var(--ink); font: 700 14px/1 var(--mono);
}
.layer-table tr.current td { background: rgba(200, 255, 74, 0.09); }
.layer-table tr.current td:first-child { color: var(--lime); }
.layer-table td.spec { color: var(--green); }
.readout {
  margin-top: 10px; padding: 9px 11px; border-radius: 10px; background: rgba(4, 6, 9, 0.6);
  border: 1px solid rgba(215, 196, 160, 0.24); font-size: 13px; color: var(--ink);
}
.readout b { color: var(--brass-light); font-family: var(--mono); }
.readout .bad { color: var(--red); }
.readout .warn { color: var(--yellow); }

/* ---------- yard ---------- */
.stage { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.tool-group {
  display: inline-flex; gap: 6px; padding: 4px; border-radius: 12px;
  border: 1px solid rgba(215, 196, 160, 0.24); background: rgba(4, 6, 9, 0.55);
}
.toolbar .btn { min-height: 40px; padding: 8px 13px; font-size: 12px; }
.btn.mode.active {
  border: none;
  color: var(--lime);
  background: linear-gradient(180deg, rgba(200, 255, 74, 0.22), transparent 40%), #1a2210;
  box-shadow: var(--btn-brass-rim), 0 0 12px rgba(200, 255, 74, 0.2);
}
.mode-hint { min-height: 1.3em; color: var(--muted); font-size: 13px; }
.mode-hint.routing { color: var(--lime); font-weight: 600; }
.toast { color: var(--brass-light); font-size: 13px; font-weight: 600; min-height: 1.2em; }
.toast:empty { display: none; }

.canvas-wrap {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--brass-dim);
  background: #0a0d0c;
  box-shadow: inset 0 0 0 1px rgba(240, 226, 196, 0.12), 0 12px 36px rgba(0, 0, 0, 0.45);
}
#yard { display: block; width: 100%; height: auto; aspect-ratio: 3 / 2; touch-action: none; cursor: grab; }
#yard.dragging { cursor: grabbing; }
#yard.routing { cursor: crosshair; }
.canvas-hint {
  position: absolute; right: 10px; bottom: 8px; padding: 3px 8px; border-radius: 6px;
  background: rgba(0, 0, 0, 0.55); color: var(--muted); font-size: 11px; pointer-events: none;
}

.route-strip { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); }
.route-strip .lbl { font-size: 11px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--brass-light); margin-right: 4px; }
.route-strip .step { display: inline-flex; align-items: center; gap: 6px; padding: 4px 9px; border-radius: 999px; border: 1px solid rgba(215, 196, 160, 0.28); background: rgba(4, 6, 9, 0.65); color: var(--ink); }
.route-strip .step i { font-style: normal; display: inline-grid; place-items: center; width: 19px; height: 19px; border-radius: 50%; background: var(--brass-mid); color: #17110a; font: 800 11px var(--mono); }
.route-strip .step em { font-style: normal; color: var(--muted); font-size: 11.5px; }
.route-strip .arrow { color: var(--brass-dim); }

.inspector h2 { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.inspector .empty { margin: 0; color: var(--muted); font-size: 13px; }
.insp-fields { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 10px; }
.insp-fields label { display: flex; flex-direction: column; gap: 4px; color: var(--muted); font-size: 12px; font-weight: 600; }
.insp-fields input[type=text] { font-family: var(--sans); font-size: 15px; }
.insp-readout { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 13px; color: var(--muted); }
.insp-readout b { font-family: var(--mono); color: var(--ink); }
.insp-readout .ok { color: var(--green); } .insp-readout .warn { color: var(--yellow); } .insp-readout .bad { color: var(--red); }
.est-tag { display: inline-block; margin-left: 6px; padding: 1px 6px; border-radius: 5px; background: rgba(232, 207, 106, 0.12); color: var(--yellow); font-size: 10.5px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.est-tag.mine { color: var(--green); background: rgba(182, 242, 122, 0.12); }

.legend { display: flex; flex-wrap: wrap; gap: 14px; color: var(--muted); font-size: 12.5px; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.swatch { display: inline-block; width: 22px; height: 6px; border-radius: 3px; }
.swatch.ok { background: var(--green); }
.swatch.warn { background: var(--yellow); }
.swatch.bad { background: var(--red); }
.swatch.rope { background: var(--blue); }
.swatch.strap { background: #e08a3c; }

.howto {
  margin: 0;
  padding: 12px 14px;
  border: 1px solid var(--brass-dim);
  border-radius: 14px;
  background: var(--brass-face);
  box-shadow: var(--brass-shadow);
  color: var(--muted);
  font-size: 13px;
}
.howto summary { cursor: pointer; color: var(--brass-light); font-weight: 700; }
.howto ul { margin: 8px 0 0; padding-left: 18px; }
.howto li { margin: 3px 0; }
.howto b { color: var(--ink); }

.site-footer {
  margin-top: 8px;
  padding-top: 12px;
  border-top: 1px solid rgba(215, 196, 160, 0.22);
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .04em;
}

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .top { grid-template-columns: minmax(0, 1fr) auto; grid-template-areas: "brand actions" "nav nav"; }
  .brand-block { justify-self: start; text-align: left; }
}
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .stage { order: -1; }
}
@media (max-width: 640px) {
  body { padding: 10px 10px 22px; gap: 8px; }
  .top { grid-template-columns: 1fr; grid-template-areas: "brand" "actions" "nav"; gap: 10px; padding: 10px 12px; }
  .brand-block { justify-self: stretch; text-align: center; }
  .top-actions { justify-self: stretch; }
  .top-actions .btn { flex: 1; }
  .site-nav { justify-self: stretch; justify-content: center; }
  .site-nav a { font-size: 11px; min-height: 30px; padding: 0.25rem 0.5rem; }
  .canvas-hint { display: none; }
  .toolbar { gap: 6px; }
  .toolbar .btn { padding: 8px 10px; font-size: 11px; }
}
@media (max-width: 460px) {
  h1 { font-size: 28px; }
  .preset-grid { grid-template-columns: 1fr 1fr; }
  .preset-btn .pr-desc { font-size: 10.5px; }
}