@font-face { font-family: "B612"; src: url("fonts/b612-latin-400-normal.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "B612"; src: url("fonts/b612-latin-700-normal.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Barlow Condensed"; src: url("fonts/barlow-condensed-latin-600-normal.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Barlow Condensed"; src: url("fonts/barlow-condensed-latin-700-normal.woff2") format("woff2"); font-weight: 700; font-display: swap; }

/* Colours taken from a German cab desk: pebble-grey panels (RAL 7032), black-grey (RAL 7021),
   the blue PZB lamp, signal yellow for the Sifa button, traffic red for the emergency brake. */
:root {
  color-scheme: light;
  --kiesel: #cfcdb9;
  --pult: #bab8a2;
  --schwarzgrau: #2e3133;
  --platte: #3b3f41;
  --pzb-blau: #1f55c4;
  --pzb-blau-dunkel: #183f93;
  --signalgelb: #f2a900;
  --verkehrsrot: #b32a22;
  --feld: #f3f2ea;
  --linie: #8f8d78;
  --measure: 38rem;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--kiesel);
  color: var(--schwarzgrau);
  font-family: "B612", system-ui, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
}

a { color: var(--pzb-blau-dunkel); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 3px solid var(--pzb-blau); outline-offset: 3px; }

.wrap { max-width: 68rem; margin: 0 auto; padding: 0 1rem; }

h1, h2 {
  font-family: "Barlow Condensed", "Arial Narrow", sans-serif;
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: 0.005em;
  margin: 0;
}

h1 { font-size: clamp(3.5rem, 11vw, 7rem); }
h2 { font-size: clamp(2rem, 5vw, 2.75rem); margin-bottom: 1rem; }

p { margin: 0 0 1rem; max-width: var(--measure); }

/* Hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 2.5rem;
  align-items: center;
  padding: 3.5rem 0 3rem;
}

.lead { font-size: 1.1875rem; margin-top: 1.25rem; }

.status {
  border-left: 4px solid var(--signalgelb);
  padding: 0.25rem 0 0.25rem 1rem;
  margin: 1.5rem 0 2rem;
  max-width: var(--measure);
}
.status strong { display: block; }

.button {
  display: inline-block;
  background: var(--pzb-blau);
  color: #fff;
  font-family: "Barlow Condensed", sans-serif;
  font-weight: 600;
  font-size: 1.375rem;
  line-height: 1;
  padding: 0.85rem 1.5rem;
  border: 0;
  border-radius: 999px;
  text-decoration: none;
  cursor: pointer;
}
.button:hover { background: var(--pzb-blau-dunkel); }

figure { margin: 0; }
figcaption { font-size: 0.875rem; margin-top: 0.6rem; color: #4a4d4f; }

/* Concept sketch */
.lever { width: 100%; height: auto; display: block; }
.lever .plate { fill: var(--platte); }
.lever .arc { fill: none; stroke: var(--pult); stroke-width: 3; }
.lever .sb-zone { fill: none; stroke: var(--verkehrsrot); stroke-width: 9; }
.lever .tick { stroke: var(--pult); stroke-width: 3; }
.lever .tick-zero { stroke: #fff; stroke-width: 4; }
.lever .tick-sb { stroke: var(--verkehrsrot); stroke-width: 4; }
.lever .tick-label { fill: var(--pult); font-family: "Barlow Condensed", sans-serif; font-weight: 600; font-size: 19px; }
.lever .tick-label-zero { fill: #fff; font-size: 22px; }
.lever .tick-label-sb { fill: #e8786f; }
.lever .zone { fill: #8a8c80; font-family: "Barlow Condensed", sans-serif; font-weight: 600; font-size: 17px; }
.lever .shaft { stroke: #d9d8cc; stroke-width: 10; stroke-linecap: round; }
.lever .grip { fill: #1d1f20; stroke: #5d6163; stroke-width: 2; }
.lever .sifa { fill: var(--signalgelb); }
.lever .pivot { fill: #23262a; stroke: var(--pult); stroke-width: 3; }
.lever .pivot-cap { fill: var(--pult); }
.lever .pzb { fill: #1d1f20; stroke: var(--pzb-blau); stroke-width: 4; }
.lever .pzb-label { fill: var(--pult); font-family: "B612", sans-serif; font-size: 12px; }

/* The one moment of motion: the lever goes from emergency brake through 0 to the first power notch. */
.lever-arm {
  transform-box: view-box;
  transform-origin: 110px 210px;
  transform: rotate(-13deg);
  animation: anfahren 2.4s cubic-bezier(.45,0,.2,1) 0.4s both;
}
@keyframes anfahren {
  0%   { transform: rotate(53deg); }
  45%  { transform: rotate(0deg); }
  60%  { transform: rotate(0deg); }
  100% { transform: rotate(-13deg); }
}
@media (prefers-reduced-motion: reduce) {
  .lever-arm { animation: none; transform: rotate(0deg); }
}

/* Sections */
.section { padding: 3rem 0; border-top: 2px solid var(--linie); }

.spec { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0 3rem; margin: 0; padding: 0; list-style: none; }
.spec li { padding: 0.75rem 0; border-bottom: 1px solid var(--linie); }
.spec li strong { font-weight: 700; }
.note { margin-top: 1.5rem; }

.price { display: flex; flex-wrap: wrap; gap: 1rem 3rem; margin: 0.5rem 0 1.5rem; }
.price div { min-width: 12rem; }
.price .amount { font-family: "Barlow Condensed", sans-serif; font-weight: 700; font-size: 3.5rem; line-height: 1; display: block; }

/* Form */
form { max-width: 40rem; }
fieldset { border: 0; padding: 0; margin: 0 0 1.5rem; }
legend, label.field-label { display: block; font-weight: 700; margin-bottom: 0.4rem; }
.optional { font-weight: 400; }
input[type="email"], select, textarea {
  width: 100%;
  font: inherit;
  color: inherit;
  background: var(--feld);
  border: 2px solid var(--linie);
  border-radius: 6px;
  padding: 0.65rem 0.75rem;
}
input[type="email"]:focus, select:focus, textarea:focus { border-color: var(--pzb-blau); outline: none; box-shadow: 0 0 0 3px rgba(31,85,196,.25); }
textarea { min-height: 6rem; resize: vertical; }
.field { margin-bottom: 1.5rem; }
.choices { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; }
.choices label { display: inline-flex; align-items: center; gap: 0.45rem; cursor: pointer; }
.choices input { width: 1.15rem; height: 1.15rem; accent-color: var(--pzb-blau); }
.form-note { font-size: 0.9375rem; margin-top: 1rem; }
.form-message { margin-top: 1rem; padding: 0.75rem 1rem; border-left: 4px solid var(--pzb-blau); background: var(--feld); }
.form-message[hidden] { display: none; }
.form-message.error { border-left-color: var(--verkehrsrot); }

/* Footer and text pages */
footer { border-top: 2px solid var(--linie); padding: 2rem 0 3rem; font-size: 0.9375rem; }
footer nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; }
.textpage { padding: 3rem 0; }
.textpage h1 { font-size: clamp(2.75rem, 8vw, 4.5rem); margin-bottom: 2rem; }
.textpage h2 { font-size: 1.75rem; margin: 2rem 0 0.75rem; }
.back { display: inline-block; margin-top: 1.5rem; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; padding-top: 2rem; gap: 2rem; }
  .spec { grid-template-columns: 1fr; }
}