/* Grundlage */
:root { color-scheme: light; padding-top: env(safe-area-inset-top); padding-bottom: env(safe-area-inset-bottom); }
body { margin: 0; font: 14px system-ui, sans-serif; }
img { max-width: 100%; }
[hidden] { display: none !important; }

:root {
  /* Werkbank: Parameterleiste | 3D-Ansicht auf dem Breadboard, Kennwerte im Schriftfeld wie auf einer Zeichnung */
  --bg: #e5e8eb;
  --panel: #f2f4f5;
  --surface: #ffffff;
  --ink: #161b21;
  --muted: #586270;
  --line: #ccd2d9;
  --rule: #9aa3ae;
  --accent: #c34e17;
  --accent-ink: #ffffff;
  --accent-soft: #f7e2d5;
  --accent-text: #9c3c0d;
  --vp: #d8dde2;
  --warn-bg: #fff1cf;
  --warn-ink: #6f4700;
  --ok: #1b7444;
  --bad: #b3261e;
  --font-display: "Barlow Condensed", "Roboto Condensed", "Arial Narrow", sans-serif;
  --font-body: "Barlow", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --r: 6px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101317; --panel: #15191e; --surface: #1b2026; --ink: #e3e7eb; --muted: #97a1ad;
    --line: #29313a; --rule: #4f5a66; --accent: #ec7635; --accent-ink: #1a0b03; --accent-soft: #3a2316;
    --accent-text: #f39a66; --vp: #0c0f12; --warn-bg: #352a10; --warn-ink: #f0cd7c; --ok: #5bc98c; --bad: #ff8a80;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #101317; --panel: #15191e; --surface: #1b2026; --ink: #e3e7eb; --muted: #97a1ad;
  --line: #29313a; --rule: #4f5a66; --accent: #ec7635; --accent-ink: #1a0b03; --accent-soft: #3a2316;
  --accent-text: #f39a66; --vp: #0c0f12; --warn-bg: #352a10; --warn-ink: #f0cd7c; --ok: #5bc98c; --bad: #ff8a80;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body { background: var(--bg); color: var(--ink); font: 400 15px/1.45 var(--font-body); -webkit-font-smoothing: antialiased; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.app { height: 100%; display: grid; grid-template-rows: auto minmax(0, 1fr); }

/* Kopfzeile */
.bar {
  display: flex; align-items: center; gap: 16px;
  padding-block: 10px;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  background: var(--panel); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; margin-right: auto; }
.brand svg { flex: none; color: var(--ink); }
.brand h1 { margin: 0; font: 600 23px/1 var(--font-display); letter-spacing: .015em; text-wrap: balance; }
.brand p { margin: 3px 0 0; font-size: 13.5px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dl { display: flex; align-items: center; gap: 12px; }
.dl-note { font-size: 12.5px; color: var(--muted); text-align: right; line-height: 1.3; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--line); background: var(--surface); border-radius: var(--r);
  padding: 8px 12px; font-size: 14px; font-weight: 500; white-space: nowrap;
}
.btn:hover { border-color: var(--rule); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; padding: 9px 16px; }
.btn.primary:hover { filter: brightness(1.07); }
.btn[disabled] { opacity: .55; cursor: default; filter: none; }
.btn svg { flex: none; }

/* Arbeitsfläche */
.layout { display: grid; grid-template-columns: minmax(300px, 388px) minmax(0, 1fr); min-height: 0; }
.panel {
  grid-column: 1; grid-row: 1; overflow-y: auto; background: var(--panel); border-right: 1px solid var(--line);
  padding-block: 4px 32px;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: 16px;
}
.stage { grid-column: 2; grid-row: 1; position: relative; min-width: 0; min-height: 0; display: grid; grid-template-rows: minmax(0, 1fr); }

/* Parametergruppen */
.grp { border-top: 1px solid var(--line); padding-block: 14px 8px; display: grid; gap: 12px; }
.grp:first-child { border-top: 0; }
.grp-h { margin: 0; display: flex; align-items: baseline; justify-content: space-between; gap: 8px;
  font: 600 13px/1.1 var(--font-display); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.grp-h small { font: 500 12px/1 var(--font-body); letter-spacing: 0; text-transform: none; }
details.grp > summary { list-style: none; cursor: pointer; }
details.grp > summary::-webkit-details-marker { display: none; }
details.grp > summary .grp-h::after { content: "+"; font: 500 16px/1 var(--font-mono); color: var(--muted); }
details.grp[open] > summary .grp-h::after { content: "−"; }
details.grp:not([open]) { padding-bottom: 14px; }
.field { display: grid; gap: 5px; min-width: 0; }
.field > label, .lbl { font-size: 13.5px; font-weight: 500; }
.row2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.num { display: flex; align-items: center; min-width: 0; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); }
.num:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.num input { flex: 1; min-width: 0; width: 100%; border: 0; background: transparent; padding: 7px 4px 7px 10px;
  font: 500 14px/1.2 var(--font-mono); font-variant-numeric: tabular-nums; }
.num input:focus { outline: none; }
.num .unit { padding-right: 10px; color: var(--muted); font-size: 12.5px; }
.num.bad { border-color: var(--bad); }
.err { margin: 0; font-size: 12px; color: var(--bad); }
select, textarea { width: 100%; min-width: 0; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 7px 10px; }
textarea { font: 400 13.5px/1.45 var(--font-mono); resize: vertical; min-height: 92px; }
.hint { margin: 0; font-size: 12.5px; line-height: 1.45; color: var(--muted); }
.hint b { color: var(--ink); font-weight: 600; }

.seg { display: flex; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.seg label { flex: 1 1 0; min-width: 0; position: relative; display: flex; }
.seg input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.seg span { flex: 1; display: flex; align-items: center; justify-content: center; gap: 6px; padding: 7px 4px; font-size: 13.5px;
  text-align: center; border-left: 1px solid var(--line); line-height: 1.15; }
.seg label:first-child span { border-left: 0; }
.seg input:checked + span { background: var(--accent-soft); color: var(--accent-text); font-weight: 600; box-shadow: inset 0 -2px 0 var(--accent); }
.seg input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: -2px; }
.seg.tall span { flex-direction: column; gap: 4px; padding: 8px 4px 7px; font-size: 12.5px; }
.seg svg { display: block; }
.check { display: flex; align-items: center; gap: 8px; font-size: 13.5px; }
.check input { accent-color: var(--accent); width: 16px; height: 16px; margin: 0; }

.cuts { display: grid; gap: 8px; }
.cut-row { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.2fr) auto; gap: 6px; align-items: center; }
.cut-row select { padding: 6px 6px; font-size: 13px; }
.cut-row .num input { padding: 6px 2px 6px 7px; font-size: 13px; }
.cut-row .num .unit { padding-right: 6px; font-size: 11.5px; }
.cut-head { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.2fr) 30px; gap: 6px; font-size: 11.5px; color: var(--muted); }
.icon-btn { width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: var(--r); background: var(--surface); color: var(--muted); }
.icon-btn:hover { color: var(--bad); border-color: var(--bad); }
.btn-row { display: flex; flex-wrap: wrap; gap: 8px; }
.btn-row .btn { padding: 6px 10px; font-size: 13px; }

.notes { display: grid; gap: 8px; }
.notes p { margin: 0; font-size: 13px; color: var(--muted); max-width: 62ch; }
.notes p b { color: var(--ink); font-weight: 600; }

/* 3D-Ansicht */
.viewport { position: relative; min-height: 0; background: var(--vp); overflow: hidden; }
.viewport canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; outline: none; }
.vp-msg { position: absolute; inset: 0; display: grid; place-items: center; padding: 24px; text-align: center; color: var(--muted); font-size: 14px; }
.vp-top { position: absolute; top: 12px; left: calc(12px + env(safe-area-inset-left, 0px)); right: calc(12px + env(safe-area-inset-right, 0px)); display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 8px; pointer-events: none; }
.vp-top > * { pointer-events: auto; }
.tool { display: flex; flex-wrap: wrap; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; box-shadow: 0 1px 2px rgb(0 0 0 / .06); }
.tool button, .tool label { display: inline-flex; align-items: center; gap: 6px; border: 0; background: transparent; padding: 6px 10px; font-size: 13px; border-left: 1px solid var(--line); cursor: pointer; }
.tool > :first-child { border-left: 0; }
.tool button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent-text); font-weight: 600; }
.tool input[type="checkbox"] { accent-color: var(--accent); margin: 0; }
.vp-cut { position: absolute; left: calc(12px + env(safe-area-inset-left, 0px)); bottom: 12px; display: flex; flex-wrap: wrap; align-items: center; gap: 8px; max-width: calc(100% - 24px); }
.vp-cut .rng { display: flex; align-items: center; gap: 8px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 4px 10px; }
.vp-cut input[type="range"] { width: 150px; accent-color: var(--accent); }
.vp-cut output { font: 500 12.5px/1 var(--font-mono); font-variant-numeric: tabular-nums; min-width: 64px; }
.vp-labels { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.vp-labels span { position: absolute; left: 0; top: 0; transform: translate(-50%, -50%); white-space: nowrap;
  font: 500 10.5px/1 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted);
  background: var(--vp); padding: 3px 5px; border-radius: 3px; }
.vp-labels span.org { color: var(--accent-text); letter-spacing: 0; text-transform: none; }

/* Schriftfeld */
.titleblock { position: absolute; right: calc(12px + env(safe-area-inset-right, 0px)); bottom: 12px; width: min(452px, calc(100% - 24px)); background: var(--surface); border: 1.5px solid var(--ink); font-size: 13px; }
.tb-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; border-bottom: 1.5px solid var(--ink); }
.tb-cell { min-width: 0; padding: 5px 9px 6px; }
.tb-head .tb-cell + .tb-cell { border-left: 1px solid var(--rule); display: flex; align-items: center; }
.tb-k { display: block; font: 600 10.5px/1.15 var(--font-display); letter-spacing: .11em; text-transform: uppercase; color: var(--muted); }
.tb-v { display: block; margin-top: 2px; font: 500 13px/1.3 var(--font-mono); font-variant-numeric: tabular-nums; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tb-name { display: block; margin-top: 1px; font: 600 20px/1.15 var(--font-display); letter-spacing: .01em; text-wrap: balance; overflow-wrap: anywhere; }
.tb-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 0; }
.tb-grid .tb-cell { border-left: 1px solid var(--rule); border-top: 1px solid var(--rule); }
.tb-grid .tb-cell:nth-child(3n + 1) { border-left: 0; }
.tb-grid .tb-cell:nth-child(-n + 3) { border-top: 0; }
.tb-grid dt { font: 600 10.5px/1.15 var(--font-display); letter-spacing: .11em; text-transform: uppercase; color: var(--muted); }
.tb-grid dd { margin: 2px 0 0; font: 500 13px/1.3 var(--font-mono); font-variant-numeric: tabular-nums; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mesh { display: inline-flex; align-items: center; gap: 6px; font: 600 11px/1 var(--font-display); letter-spacing: .1em; text-transform: uppercase; color: var(--ok); white-space: nowrap; }
.mesh::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.mesh.bad { color: var(--bad); }
.tb-warn { list-style: none; margin: 0; padding: 6px 9px 7px; display: grid; gap: 3px; background: var(--warn-bg); color: var(--warn-ink); border-top: 1px solid var(--rule); font-size: 12.5px; line-height: 1.35; }
.tb-warn[hidden] { display: none; }
.tb-warn li::before { content: "△ "; }
.toast { position: absolute; left: 50%; top: 58px; transform: translateX(-50%); background: var(--ink); color: var(--surface); padding: 7px 12px; border-radius: var(--r); font-size: 13px; max-width: calc(100% - 32px); text-align: center; }

@media (max-width: 1100px) {
  .tb-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tb-grid .tb-cell:nth-child(3n + 1) { border-left: 1px solid var(--rule); }
  .tb-grid .tb-cell:nth-child(2n + 1) { border-left: 0; }
  .tb-grid .tb-cell:nth-child(3) { border-top: 1px solid var(--rule); }
  .dl-note { display: none; }
}
@media (max-width: 860px) {
  html, body { height: auto; }
  .app { height: auto; display: block; }
  .bar { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; }
  body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 21; background: var(--panel); }
  .brand p { display: none; }
  .layout { display: block; }
  .stage { display: block; }
  .viewport { height: 60vh; min-height: 340px; }
  .titleblock { position: static; width: auto; margin-block: 12px 4px;
    margin-left: max(16px, env(safe-area-inset-left, 0px)); margin-right: max(16px, env(safe-area-inset-right, 0px)); }
  .panel { overflow: visible; border-right: 0; padding-right: max(16px, env(safe-area-inset-right, 0px)); }
  .vp-cut input[type="range"] { width: 110px; }
}
@media (max-width: 520px) {
  .btn.primary .long { display: none; }
  .tb-name { font-size: 18px; }
}
@media (max-width: 420px) {
  .brand h1 { font-size: 20px; }
  .btn.primary { padding: 8px 12px; }
  .tool button, .tool label { padding: 6px 8px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }