/* π-Labor – Aurora + Glas (Design-Brief „modernes App-Design“) */
[hidden] { display: none !important; }
:root {
  --bg: #eef4f6;
  --text: #0f2530;
  --text-2: #4a6270;
  --akzent: #1a7f9c;        /* Petrol, aufgehellt */
  --akzent-2: #e07a35;      /* Burnt Orange */
  --akzent-3: #2bb3a3;      /* Türkis */
  --glas: rgba(255, 255, 255, 0.62);
  --glas-rand: rgba(255, 255, 255, 0.85);
  --glas-schatten: 0 18px 50px -18px rgba(26, 95, 122, 0.35);
  --glow: 0 0 40px rgba(26, 127, 156, 0.28);
  --glow-2: 0 0 40px rgba(224, 122, 53, 0.30);
  --blob-1: #5ec8d8; --blob-2: #f2a76b; --blob-3: #7fb0ff; --blob-4: #8be0c4;
  --radius: 22px;
  --ok: #1f9d63; --ok-bg: rgba(31, 157, 99, .12);
}
:root[data-theme="dark"] {
  --bg: #060b12;
  --text: #e8f3f6;
  --text-2: #9fb6c0;
  --akzent: #38c2de;
  --akzent-2: #ff9a52;
  --akzent-3: #3fe0c5;
  --glas: rgba(16, 28, 38, 0.62);
  --glas-rand: rgba(255, 255, 255, 0.10);
  --glas-schatten: 0 18px 60px -20px rgba(0, 0, 0, 0.7);
  --glow: 0 0 46px rgba(56, 194, 222, 0.30);
  --glow-2: 0 0 46px rgba(255, 154, 82, 0.30);
  --blob-1: #0e7490; --blob-2: #c2410c; --blob-3: #1d4ed8; --blob-4: #0f766e;
  --ok: #3ddc97; --ok-bg: rgba(61, 220, 151, .14);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #060b12; --text: #e8f3f6; --text-2: #9fb6c0;
    --akzent: #38c2de; --akzent-2: #ff9a52; --akzent-3: #3fe0c5;
    --glas: rgba(16, 28, 38, 0.62); --glas-rand: rgba(255, 255, 255, 0.10);
    --glas-schatten: 0 18px 60px -20px rgba(0, 0, 0, 0.7);
    --glow: 0 0 46px rgba(56, 194, 222, 0.30); --glow-2: 0 0 46px rgba(255, 154, 82, 0.30);
    --blob-1: #0e7490; --blob-2: #c2410c; --blob-3: #1d4ed8; --blob-4: #0f766e;
    --ok: #3ddc97; --ok-bg: rgba(61, 220, 151, .14);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--akzent); }

/* ---------- Aurora-Hintergrund ---------- */
.aurora { position: fixed; inset: 0; z-index: -1; overflow: hidden; background: var(--bg); }
.blob { position: absolute; border-radius: 50%; filter: blur(110px); opacity: .55; will-change: transform; }
.b1 { width: 48vw; height: 48vw; left: -10vw; top: -12vw; background: var(--blob-1); animation: drift1 32s ease-in-out infinite alternate; }
.b2 { width: 40vw; height: 40vw; right: -8vw; top: 10vh; background: var(--blob-2); animation: drift2 38s ease-in-out infinite alternate; }
.b3 { width: 44vw; height: 44vw; left: 20vw; bottom: -18vw; background: var(--blob-3); animation: drift3 28s ease-in-out infinite alternate; opacity: .4; }
.b4 { width: 30vw; height: 30vw; right: 15vw; bottom: 5vh; background: var(--blob-4); animation: drift1 36s ease-in-out infinite alternate-reverse; opacity: .45; }
.grain {
  position: absolute; inset: 0; opacity: .05;
  background-image: radial-gradient(currentColor 1px, transparent 1px);
  background-size: 22px 22px; color: var(--text);
}
@keyframes drift1 { to { transform: translate(8vw, 6vh) scale(1.12); } }
@keyframes drift2 { to { transform: translate(-10vw, 8vh) scale(.9); } }
@keyframes drift3 { to { transform: translate(6vw, -8vh) scale(1.15); } }

/* ---------- Glas ---------- */
.glass {
  background: var(--glas);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--glas-rand);
  box-shadow: var(--glas-schatten), inset 0 1px 0 rgba(255,255,255,.35);
}

/* ---------- Kopfleiste ---------- */
.topbar {
  position: sticky; top: 12px; z-index: 10;
  margin: 12px auto 0; width: min(1180px, calc(100% - 32px));
  display: flex; align-items: center; gap: 16px;
  padding: 10px 14px 10px 12px; border-radius: 999px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.brand-pi {
  display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%;
  font: 700 26px/1 Georgia, "Times New Roman", serif; color: #fff;
  background: linear-gradient(135deg, var(--akzent), var(--akzent-3));
  box-shadow: var(--glow);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 17px; letter-spacing: -.01em; }
.brand-text small { font-size: 12px; color: var(--text-2); }
.nav { display: flex; gap: 6px; margin-left: auto; }
.nav a {
  text-decoration: none; color: var(--text-2); font-weight: 600; font-size: 15px;
  padding: 8px 16px; border-radius: 999px; transition: background .2s, color .2s, transform .15s;
}
.nav a:hover { color: var(--text); background: rgba(127,127,127,.12); }
.nav a.aktiv { color: #fff; background: linear-gradient(135deg, var(--akzent), var(--akzent-3)); box-shadow: var(--glow); }
.theme-toggle {
  border: 0; cursor: pointer; width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center; color: var(--text); background: rgba(127,127,127,.12);
  transition: transform .15s;
}
.theme-toggle:hover { transform: rotate(-15deg); }
.theme-toggle:active { transform: scale(.94); }

/* ---------- Layout ---------- */
main { width: min(1180px, calc(100% - 32px)); margin: 28px auto 40px; outline: none; }
.foot { text-align: center; color: var(--text-2); font-size: 13px; padding: 0 16px 28px; }
.hero { padding: 36px 32px; border-radius: var(--radius); margin-bottom: 22px; position: relative; overflow: hidden; }
.hero h1 {
  margin: 0 0 8px; font-size: clamp(30px, 5vw, 48px); line-height: 1.05; letter-spacing: -.03em; font-weight: 800;
  background: linear-gradient(120deg, var(--akzent), var(--akzent-3) 45%, var(--akzent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p { margin: 0; max-width: 680px; color: var(--text-2); font-size: 17px; }
.hero .deko {
  position: absolute; right: -10px; top: -40px; font: 700 220px/1 Georgia, serif;
  color: var(--akzent); opacity: .08; pointer-events: none;
}
.sektion-titel { font-size: 15px; text-transform: uppercase; letter-spacing: .08em; color: var(--text-2); margin: 26px 4px 12px; font-weight: 700; }

/* ---------- Karten-Grid ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.karte {
  border-radius: var(--radius); padding: 20px; text-decoration: none; color: var(--text);
  display: flex; flex-direction: column; gap: 8px; position: relative; overflow: hidden;
  transition: transform .2s cubic-bezier(.2,.8,.2,1), box-shadow .2s;
}
.karte:hover { transform: translateY(-3px); box-shadow: var(--glas-schatten), var(--glow); }
.karte:active { transform: scale(.98); }
.karte h3 { margin: 0; font-size: 19px; letter-spacing: -.01em; }
.karte p { margin: 0; color: var(--text-2); font-size: 14.5px; }
.karte .chips { display: flex; gap: 6px; flex-wrap: wrap; margin-top: auto; padding-top: 6px; }
.chip { font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 999px; background: rgba(127,127,127,.14); color: var(--text-2); }
.chip.ab { background: rgba(26,127,156,.14); color: var(--akzent); }
.chip.bald { background: rgba(224,122,53,.14); color: var(--akzent-2); }
.chip.ok { background: var(--ok-bg); color: var(--ok); }
.karte .icon {
  width: 44px; height: 44px; border-radius: 14px; display: grid; place-items: center;
  font: 700 20px/1 Georgia, serif; color: #fff;
}
.icon.petrol { background: linear-gradient(135deg, var(--akzent), var(--akzent-3)); box-shadow: var(--glow); }
.icon.orange { background: linear-gradient(135deg, var(--akzent-2), #f4b04a); box-shadow: var(--glow-2); }

/* ---------- Tipps ---------- */
.ab-tabs { display: flex; gap: 8px; flex-wrap: wrap; padding: 10px; border-radius: 999px; margin-bottom: 18px; }
.ab-tabs a {
  text-decoration: none; font-weight: 700; font-size: 14px; color: var(--text-2);
  padding: 8px 14px; border-radius: 999px; transition: all .18s;
}
.ab-tabs a:hover { background: rgba(127,127,127,.12); color: var(--text); }
.ab-tabs a.aktiv { color: #fff; background: linear-gradient(135deg, var(--akzent-2), #f4b04a); box-shadow: var(--glow-2); }
.ab-kopf { padding: 22px 26px; border-radius: var(--radius); margin-bottom: 16px; }
.ab-kopf .label { font-size: 13px; font-weight: 800; letter-spacing: .08em; color: var(--akzent-2); text-transform: uppercase; }
.ab-kopf h2 { margin: 4px 0 6px; font-size: 28px; letter-spacing: -.02em; }
.ab-kopf p { margin: 0; color: var(--text-2); }
.gruppe-titel { margin: 22px 4px 10px; font-size: 17px; font-weight: 800; letter-spacing: -.01em; }
.tipp {
  border-radius: 18px; margin-bottom: 12px; overflow: hidden;
  transition: box-shadow .25s;
}
.tipp[open] { box-shadow: var(--glas-schatten), var(--glow); }
.tipp summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; gap: 14px; padding: 16px 18px;
  user-select: none;
}
.tipp summary::-webkit-details-marker { display: none; }
.tipp .buchstabe {
  flex: none; width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center;
  font-weight: 800; color: #fff; background: linear-gradient(135deg, var(--akzent), var(--akzent-3));
}
.tipp .kopf { display: flex; flex-direction: column; line-height: 1.25; }
.tipp .kopf strong { font-size: 16px; }
.tipp .kopf small { color: var(--text-2); font-size: 13px; }
.tipp .status { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.tipp .pfeil { transition: transform .25s; color: var(--text-2); }
.tipp[open] .pfeil { transform: rotate(180deg); }
.tipp .inhalt { padding: 0 20px 18px 72px; font-size: 16px; animation: auf .35s cubic-bezier(.2,.8,.2,1); }
.tipp .inhalt ul { padding-left: 20px; margin: 6px 0; }
.tipp .inhalt .katex-display { margin: .6em 0; }
.tipp-fig { display: block; margin: 4px 0 8px; }
.hinweis-erst {
  border-radius: 14px; padding: 12px 16px; margin: 0 0 16px; font-size: 14.5px; color: var(--text-2);
  border-left: 4px solid var(--akzent-2);
}
.deeplink { font-size: 12.5px; color: var(--text-2); margin-top: 10px; display: inline-flex; gap: 6px; align-items: center; cursor: pointer; background: none; border: 0; padding: 0; }
.deeplink:hover { color: var(--akzent); }
@keyframes auf { from { opacity: 0; transform: translateY(-6px); filter: blur(4px); } to { opacity: 1; transform: none; filter: none; } }

/* ---------- Platzhalter Station ---------- */
.platzhalter { padding: 40px 32px; border-radius: var(--radius); text-align: center; }
.platzhalter h2 { margin: 0 0 8px; font-size: 30px; letter-spacing: -.02em; }
.platzhalter p { color: var(--text-2); margin: 0 auto; max-width: 560px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; border: 0; cursor: pointer;
  padding: 11px 22px; border-radius: 999px; font-weight: 700; font-size: 15px; color: #fff; text-decoration: none;
  background: linear-gradient(135deg, var(--akzent), var(--akzent-3)); box-shadow: var(--glow);
  position: relative; overflow: hidden; transition: transform .15s;
}
.btn::after {
  content: ""; position: absolute; inset: 0; transform: translateX(-120%);
  background: linear-gradient(110deg, transparent 30%, rgba(255,255,255,.45) 50%, transparent 70%);
  transition: transform .6s;
}
.btn:hover { transform: translateY(-2px); }
.btn:hover::after { transform: translateX(120%); }
.btn:active { transform: scale(.97); }

/* ---------- Einblenden ---------- */
.rein { opacity: 0; transform: translateY(8px); animation: rein .5s cubic-bezier(.2,.8,.2,1) forwards; }
@keyframes rein { to { opacity: 1; transform: none; } }

/* ---------- Mobil ---------- */
@media (max-width: 640px) {
  .topbar { gap: 8px; padding: 8px; }
  .brand-text { display: none; }
  .brand-pi { width: 38px; height: 38px; font-size: 22px; }
  .nav a { padding: 7px 12px; font-size: 14px; }
  .theme-toggle { width: 36px; height: 36px; flex: none; }
  .hero { padding: 26px 20px; }
  .tipp .inhalt { padding: 0 16px 16px 16px; }
  .ab-tabs { border-radius: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  .blob { animation: none; }
  .rein { animation: none; opacity: 1; transform: none; }
  .tipp .inhalt { animation: none; }
  * { transition: none !important; }
}

/* =====================================================================
   Stationen
   ===================================================================== */
.station-kopf { display: flex; align-items: center; gap: 16px; padding: 18px 22px; border-radius: var(--radius); margin-bottom: 16px; }
.zurueck {
  flex: none; width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center;
  color: var(--text); background: rgba(127,127,127,.14); transition: transform .15s, background .2s;
}
.zurueck:hover { transform: translateX(-2px); background: rgba(127,127,127,.22); }
.station-titel .label { font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; color: var(--akzent-2); }
.station-titel h1 {
  margin: 2px 0 2px; font-size: clamp(24px, 3.4vw, 34px); letter-spacing: -.025em; line-height: 1.1;
  background: linear-gradient(120deg, var(--akzent), var(--akzent-3) 60%, var(--akzent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.station-titel p { margin: 0; color: var(--text-2); font-size: 15px; }
.station-chips { margin-left: auto; display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.station-chips a { text-decoration: none; }

.station-raster { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 16px; align-items: start; }
.buehne { border-radius: var(--radius); padding: 16px; position: relative; overflow: hidden; }
.buehne-kopf { display: flex; gap: 8px; justify-content: flex-end; min-height: 26px; }
.steuerung { border-radius: var(--radius); padding: 18px; position: sticky; top: 96px; }
.station-unten { border-radius: var(--radius); padding: 18px 20px; margin-top: 16px; }
.unten-kopf { display: flex; align-items: center; justify-content: space-between; }

.st-titel { font-size: 13px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; color: var(--text-2); margin: 16px 0 10px; }
.st-titel:first-child { margin-top: 0; }

.sim-svg { width: 100%; height: auto; display: block; }
.sim-hinweis { margin: 8px 4px 0; color: var(--text-2); font-size: 15px; min-height: 1.5em; }
.sim-boden { stroke: var(--text-2); stroke-opacity: .45; stroke-width: 2; }
.sim-spur { stroke: var(--akzent); stroke-width: 7; stroke-linecap: round; filter: drop-shadow(0 0 6px var(--akzent)); }
.sim-zykloide { fill: none; stroke: var(--akzent-2); stroke-width: 2.5; stroke-dasharray: 2 6; stroke-linecap: round; opacity: .9; }
.sim-rad { stroke: var(--akzent); stroke-width: 4; }
.sim-speiche { stroke: var(--akzent); stroke-opacity: .35; stroke-width: 2; }
.sim-durchmesser { stroke: var(--akzent); stroke-width: 4; stroke-linecap: round; }
.sim-punkt { fill: var(--akzent-2); }
.sim-nabe { fill: var(--text); }
.sim-label { fill: var(--text); font: 700 20px system-ui, sans-serif; }
.sim-label.klein { font-size: 16px; fill: var(--text-2); }
.sim-label.rest { fill: var(--akzent-2); }
.sim-seg { stroke: var(--akzent); stroke-width: 12; stroke-linecap: butt; }
.sim-seg.alt { stroke: var(--akzent-3); }
.sim-seg.rest { stroke: var(--akzent-2); filter: drop-shadow(0 0 6px var(--akzent-2)); }

.pillen { display: flex; flex-wrap: wrap; gap: 6px; }
.pille {
  border: 1px solid var(--glas-rand); background: rgba(127,127,127,.10); color: var(--text);
  font: 600 14px system-ui, sans-serif; padding: 7px 13px; border-radius: 999px; cursor: pointer;
  transition: transform .15s, background .2s, box-shadow .2s;
}
.pille:hover { transform: translateY(-1px); background: rgba(127,127,127,.18); }
.pille:active { transform: scale(.96); }
.pille.aktiv { color: #fff; border-color: transparent; background: linear-gradient(135deg, var(--akzent), var(--akzent-3)); box-shadow: var(--glow); }

.regler { display: flex; flex-direction: column; gap: 6px; margin-top: 14px; font-size: 14px; color: var(--text-2); }
.regler b { color: var(--text); }
input[type="range"] { width: 100%; accent-color: var(--akzent); height: 28px; }
.schalter { display: flex; align-items: center; gap: 8px; margin-top: 12px; font-size: 14px; color: var(--text-2); cursor: pointer; }
.schalter input { width: 18px; height: 18px; accent-color: var(--akzent-2); }

.knopfreihe { display: flex; flex-wrap: wrap; gap: 8px; }
.knopfreihe .btn { margin-top: 0; }
.btn-2 { background: linear-gradient(135deg, var(--akzent-2), #f4b04a); box-shadow: var(--glow-2); }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }
.link-knopf { background: none; border: 0; color: var(--text-2); cursor: pointer; font-size: 13px; text-decoration: underline; }

.kacheln { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.kachel { border-radius: 14px; padding: 10px; background: rgba(127,127,127,.10); border: 1px solid var(--glas-rand); text-align: center; }
.kachel small { display: block; font-size: 11.5px; color: var(--text-2); font-weight: 700; }
.kachel strong { display: block; font-size: 19px; font-variant-numeric: tabular-nums; letter-spacing: -.01em; margin-top: 2px; }
.kachel.glow { background: linear-gradient(135deg, rgba(26,127,156,.16), rgba(43,179,163,.12)); }
.kachel.glow strong { color: var(--akzent); }
.puls { animation: puls .9s ease-out; }
@keyframes puls { 0% { box-shadow: 0 0 0 0 rgba(43,179,163,.55); } 100% { box-shadow: 0 0 0 18px rgba(43,179,163,0); } }

.tabelle-wrap { overflow-x: auto; }
.tabelle { width: 100%; border-collapse: collapse; font-size: 15px; font-variant-numeric: tabular-nums; }
.tabelle th { text-align: left; font-size: 12.5px; text-transform: uppercase; letter-spacing: .05em; color: var(--text-2); padding: 8px 10px; border-bottom: 1px solid var(--glas-rand); }
.tabelle td { padding: 9px 10px; border-bottom: 1px solid rgba(127,127,127,.15); }
.tabelle tr.leer td { color: var(--text-2); font-style: italic; }
.tabelle tr.neu { animation: zeileNeu 1.2s ease-out; }
@keyframes zeileNeu { from { background: rgba(224,122,53,.22); } to { background: transparent; } }

@media (max-width: 900px) {
  .station-raster { grid-template-columns: 1fr; }
  .steuerung { position: static; }
}
@media (max-width: 640px) {
  .station-kopf { flex-wrap: wrap; padding: 14px 16px; }
  .station-chips { margin-left: 0; justify-content: flex-start; }
  .kachel strong { font-size: 16px; }
}
.kachel .einheit { display: block; font-style: normal; font-size: 11.5px; color: var(--text-2); }
@media (max-width: 640px) {
  .sim-label { font-size: 34px; }
  .sim-label.klein { font-size: 28px; }
}

/* ---------- Formulare & Messdaten ---------- */
.feld {
  width: 100%; font: 500 16px system-ui, sans-serif; color: var(--text);
  padding: 10px 14px; border-radius: 12px; border: 1px solid var(--glas-rand);
  background: rgba(127,127,127,.10); outline: none; transition: border-color .2s, box-shadow .2s;
}
.feld:focus { border-color: var(--akzent); box-shadow: 0 0 0 3px rgba(26,127,156,.22); }
.zeile { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.zeile .feld { flex: 1 1 140px; width: auto; }
.zwei { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 8px; }
.feld-label { display: flex; flex-direction: column; gap: 4px; font-size: 12.5px; font-weight: 700; color: var(--text-2); }
#md-form .btn { margin-top: 8px; }
.btn.klein { margin-top: 0; padding: 9px 16px; font-size: 14px; }
.btn-gefahr { background: linear-gradient(135deg, #d9485f, #f07b5e); box-shadow: 0 0 30px rgba(217,72,95,.3); }
.vorschau { margin: 8px 2px 0; font-size: 15px; color: var(--text-2); }
.vorschau b { color: var(--akzent); font-size: 17px; }
.meldung { min-height: 1.3em; margin: 8px 2px 0; font-size: 14px; }
.meldung.ok { color: var(--ok); }
.meldung.fehler { color: #d9485f; }
.x-knopf { border: 0; background: none; color: var(--text-2); font-size: 20px; cursor: pointer; border-radius: 8px; width: 30px; height: 30px; }
.x-knopf:hover { background: rgba(217,72,95,.15); color: #d9485f; }
.tabelle tr.eigen td { background: rgba(43,179,163,.08); }
.lehrkraft { margin-top: 14px; border-top: 1px solid var(--glas-rand); padding-top: 12px; }
.lehrkraft summary { cursor: pointer; font-weight: 700; color: var(--text-2); font-size: 14px; margin-bottom: 10px; }

.legende { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin: 6px 6px 0; font-size: 13.5px; color: var(--text-2); }
.pkt { display: inline-block; width: 11px; height: 11px; border-radius: 50%; background: var(--akzent); vertical-align: -1px; margin-right: 4px; box-shadow: 0 0 8px var(--akzent); }
.pkt.eigen { background: var(--akzent-3); box-shadow: 0 0 0 3px rgba(43,179,163,.35), 0 0 10px var(--akzent-3); }
.pkt.aus { background: transparent; border: 2px solid var(--akzent-2); box-shadow: none; }
.schalter.inline { margin: 0 0 0 auto; }

.gitter { stroke: var(--text-2); stroke-opacity: .14; stroke-width: 1; }
.achse { stroke: var(--text-2); stroke-opacity: .6; stroke-width: 2; }
.achs-zahl { fill: var(--text-2); font: 500 17px system-ui, sans-serif; }
.achs-titel { fill: var(--text-2); font: 700 17px system-ui, sans-serif; }
.gerade { stroke: var(--akzent-2); stroke-width: 4; stroke-linecap: round; filter: drop-shadow(0 0 6px var(--akzent-2)); }
.geraden-label { fill: var(--akzent-2); font: 800 24px system-ui, sans-serif; }
.mpunkt { fill: var(--akzent); stroke: #fff; stroke-width: 2; transition: r .2s; }
.mpunkt.eigen { fill: var(--akzent-3); stroke-width: 3; }
.mpunkt.aus { fill: transparent; stroke: var(--akzent-2); stroke-width: 3; }
.mpunkt:hover { r: 11; }
.leer-text { fill: var(--text-2); font: 600 22px system-ui, sans-serif; }
@media (max-width: 640px) {
  .achs-zahl, .achs-titel { font-size: 26px; }
  .geraden-label { font-size: 32px; }
}

/* ---------- n-Eck-Zange ---------- */
.sim-svg.quadrat { max-height: 520px; }
.poly-kreis { fill: rgba(26,127,156,.06); stroke: var(--text); stroke-width: 2.5; vector-effect: non-scaling-stroke; }
.poly-innen { fill: rgba(43,179,163,.18); stroke: var(--akzent-3); stroke-width: 2.5; vector-effect: non-scaling-stroke; stroke-linejoin: round; }
.poly-aussen { fill: rgba(224,122,53,.12); stroke: var(--akzent-2); stroke-width: 2.5; vector-effect: non-scaling-stroke; stroke-linejoin: round; }
.zange { margin: 10px 6px 4px; }
.zange-kopf { display: flex; justify-content: space-between; align-items: center; font-weight: 800; font-size: 14px; color: var(--text-2); margin-bottom: 8px; }
.zange-leiste { position: relative; height: 34px; border-radius: 999px; background: rgba(127,127,127,.12); border: 1px solid var(--glas-rand); overflow: hidden; }
.zange-band { position: absolute; top: 4px; bottom: 4px; border-radius: 999px;
  background: linear-gradient(90deg, var(--akzent-3), var(--akzent-2)); box-shadow: var(--glow); transition: left .35s ease, width .35s ease; }
.zange-pi { position: absolute; top: -2px; bottom: -2px; width: 2px; background: var(--text); transform: translateX(-1px); transition: left .35s ease; }
.zange-pi span { position: absolute; top: 50%; left: 6px; transform: translateY(-50%); font: 700 16px Georgia, serif; color: var(--text); }
.zange-skala { display: flex; justify-content: space-between; font-size: 12.5px; color: var(--text-2); margin-top: 4px; font-variant-numeric: tabular-nums; }
.gross-zahl { display: flex; align-items: baseline; gap: 8px; }
.gross-zahl span { font-size: 44px; font-weight: 800; letter-spacing: -.03em; line-height: 1;
  background: linear-gradient(120deg, var(--akzent), var(--akzent-3)); -webkit-background-clip: text; background-clip: text; color: transparent; font-variant-numeric: tabular-nums; }
.gross-zahl small { color: var(--text-2); font-weight: 700; }
.knopfreihe .pille { padding: 8px 14px; }
.kacheln.klein strong { font-size: 15.5px; }
.kacheln.klein .kachel { padding: 10px 4px; }
.pkt.innen { background: var(--akzent-3); box-shadow: none; }
.pkt.aussen { background: var(--akzent-2); box-shadow: none; }
.pkt.kreis { background: var(--text); box-shadow: none; }
.canvas-rahmen { width: 100%; margin: 0 auto; }
.canvas-rahmen.quadrat { max-width: 560px; }
.canvas-rahmen canvas { width: 100%; height: auto; display: block; }

/* ---------- Zerlegen ---------- */
.zl-umriss { fill: none; stroke: var(--text-2); stroke-opacity: .35; stroke-width: 2; stroke-dasharray: 6 8; }
.zl-stueck { stroke: var(--bg); stroke-width: 1.2; stroke-linejoin: round; }
.zl-stueck.oben { fill: var(--akzent-3); fill-opacity: .85; }
.zl-stueck.unten { fill: var(--akzent-2); fill-opacity: .85; }
.zl-mass { stroke: var(--text); stroke-width: 2.5; marker-start: none; }
.zl-masse { transition: opacity .5s; }
.gross-zahl { margin-bottom: 10px; }

/* ---------- Regentropfen / Verlaufsgraphen ---------- */
.regen-raster { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px; align-items: start; }
.regen-raster .st-titel { margin-top: 4px; }
.achs-zahl.klein { font-size: 14px; }
.pi-linie { stroke: var(--text); stroke-width: 2; stroke-dasharray: 7 6; opacity: .7; }
.pi-text { fill: var(--text); font: 700 22px Georgia, serif; }
.verlauf-linie { fill: none; stroke: var(--akzent-2); stroke-width: 2.5; stroke-linejoin: round; filter: drop-shadow(0 0 4px var(--akzent-2)); }
.verlauf-punkt { fill: var(--akzent-2); stroke: #fff; stroke-width: 2; }
@media (max-width: 1100px) { .regen-raster { grid-template-columns: 1fr; } }

/* ---------- Kreis-Trainer ---------- */
.trainer-kopf { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.serie { display: flex; gap: 6px; }
.serie i { width: 16px; height: 16px; border-radius: 50%; background: rgba(127,127,127,.2); transition: background .3s, box-shadow .3s; }
.serie i.an { background: var(--ok); box-shadow: 0 0 12px var(--ok); }
.trainer-karte { display: grid; grid-template-columns: 170px 1fr; gap: 22px; align-items: center; padding: 22px; border-radius: 18px;
  background: rgba(127,127,127,.07); border: 1px solid var(--glas-rand); }
.trainer-skizze { width: 100%; }
.tr-kreis { fill: rgba(26,127,156,.10); stroke: var(--akzent); stroke-width: 4; }
.tr-d, .tr-r { stroke: var(--akzent-2); stroke-width: 4; stroke-linecap: round; }
.tr-l { fill: var(--akzent-2); font: 800 22px system-ui, sans-serif; }
.trainer-aufgabe { font-size: 19px; line-height: 1.5; margin: 0 0 14px; }
.trainer-eingabe { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 18px; flex: 1 1 260px; }
.trainer-eingabe .feld { max-width: 160px; font-size: 18px; }
.einheit-text { color: var(--text-2); font-weight: 600; font-size: 15px; }
.rueck { min-height: 2.2em; margin: 12px 0 6px; font-size: 16px; padding: 0; border-radius: 12px; transition: background .2s; }
.rueck.ok, .rueck.fehler { padding: 10px 14px; }
.rueck.ok { background: var(--ok-bg); color: var(--ok); }
.rueck.fehler { background: rgba(224,122,53,.12); color: var(--text); }
@media (max-width: 640px) { .trainer-karte { grid-template-columns: 1fr; } .trainer-skizze { max-width: 150px; margin: 0 auto; } }

/* ---------- Seil-Simulator ---------- */
.sl-planet { stroke: var(--akzent); stroke-width: 3; }
.sl-seil { fill: none; stroke: var(--akzent-2); stroke-width: 5; stroke-dasharray: 14 8; filter: drop-shadow(0 0 6px var(--akzent-2)); }
.sl-mass { stroke: var(--text); stroke-width: 3; }
.vergleich { display: flex; flex-wrap: wrap; gap: 8px; }
.vgl { position: relative; display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 8px 10px 6px; min-width: 78px;
  border-radius: 14px; background: rgba(127,127,127,.08); border: 1px solid var(--glas-rand); opacity: .55; transition: all .3s; }
.vgl b { font-size: 26px; line-height: 1; }
.vgl small { font-size: 11.5px; color: var(--text-2); font-weight: 700; text-align: center; }
.vgl em { position: absolute; top: -6px; right: -6px; width: 20px; height: 20px; border-radius: 50%; font-style: normal; font-size: 12px;
  display: grid; place-items: center; color: #fff; background: var(--ok); box-shadow: 0 0 10px var(--ok); }
.vgl.passt { opacity: 1; background: var(--ok-bg); border-color: rgba(31,157,99,.4); }

/* ---------- Sektor-Labor ---------- */
.sektor-raster { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 18px; align-items: center; }
.sk-kreis { fill: rgba(127,127,127,.06); stroke: var(--text-2); stroke-width: 2; stroke-dasharray: 5 6; }
.sk-sektor { fill: rgba(43,179,163,.28); stroke: var(--akzent-3); stroke-width: 2; }
.sk-bogen { fill: none; stroke: var(--akzent-2); stroke-width: 8; stroke-linecap: round; filter: drop-shadow(0 0 6px var(--akzent-2)); }
.sk-schenkel { stroke: var(--akzent); stroke-width: 3.5; stroke-linecap: round; }
.sk-winkel { fill: none; stroke: var(--text); stroke-width: 2; }
.sk-griff { fill: var(--akzent-2); stroke: #fff; stroke-width: 4; cursor: grab; filter: drop-shadow(0 0 8px var(--akzent-2)); }
.sk-griff:active { cursor: grabbing; }
.anteil-balken { height: 18px; border-radius: 999px; background: rgba(127,127,127,.14); overflow: hidden; }
.anteil-balken div { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--akzent-3), var(--akzent-2)); box-shadow: var(--glow); transition: width .2s; }
.anteil-text { display: flex; align-items: center; gap: 14px; font-size: 22px; margin: 10px 0 0; }
.anteil-text small { font-size: 14px; color: var(--text-2); }
.formel { font-size: 17px; margin: 8px 0; overflow-x: auto; }
#sk-a { margin: 6px 0 8px; }
@media (max-width: 1100px) { .sektor-raster { grid-template-columns: 1fr; } }
.sk-griff:focus { outline: none; } .sk-griff:focus-visible { stroke: var(--akzent); stroke-width: 6; }

/* ---------- Wickel-Labor ---------- */
.wk-kreis { fill: rgba(127,127,127,.06); stroke: var(--text-2); stroke-width: 2; stroke-dasharray: 5 6; }
.wk-radius { stroke: var(--akzent-2); stroke-width: 6; stroke-linecap: round; }
.wk-band { fill: none; stroke-width: 14; stroke-linecap: butt; filter: drop-shadow(0 0 5px rgba(26,127,156,.5)); }
.wk-band.rest { stroke: var(--akzent-2); filter: drop-shadow(0 0 6px var(--akzent-2)); }
.wk-sehne { fill: none; stroke: var(--text); stroke-width: 2.5; stroke-dasharray: 8 6; }
.wk-wbogen { fill: none; stroke: var(--akzent-2); stroke-width: 3; }
.wk-schenkel { stroke: var(--akzent-2); stroke-width: 3; stroke-dasharray: 6 5; }

/* ---------- π-Ziffernsuche ---------- */
.suche { display: flex; gap: 10px; }
.feld.gross { font-size: 26px; font-weight: 700; letter-spacing: .12em; padding: 12px 18px; font-variant-numeric: tabular-nums; }
.suche .btn { margin-top: 0; }
.fund { margin: 16px 2px 8px; min-height: 2em; }
.fund-text { font-size: 18px; margin: 0; }
.ziffern-fenster { border-radius: 16px; padding: 16px 18px; background: rgba(127,127,127,.08); border: 1px solid var(--glas-rand); }
.zf-kopf { font-size: 13px; font-weight: 800; color: var(--text-2); margin-bottom: 8px; }
.zf-ziffern { font: 500 21px/1.9 ui-monospace, "SF Mono", Menlo, monospace; word-break: break-all; color: var(--text-2); }
.zf-ziffern b { color: var(--text); }
.zf-ziffern .lucke { display: inline-block; width: .5em; }
.zf-ziffern mark { background: linear-gradient(135deg, var(--akzent-2), #f4b04a); color: #fff; border-radius: 6px; padding: 1px 2px; box-shadow: var(--glow-2); font-weight: 800; }
.zf-balken { fill: var(--akzent); opacity: .85; }
.achs-zahl.mini { font-size: 10.5px; }