/* Kälte + Klimatechnik, M. Schaffner – Entwurf Seetalwebsites
   Idee: Die Seite ist ein Thermostat. Beim Laden kühlt sie von Sommerhitze auf 4 °C ab,
   beim Scrollen hat jeder Abschnitt seine Temperatur und färbt die ganze Seite. */

:root {
  --kuehl: #0B1C1E;   /* Kühlraum, 4 °C */
  --frost: #E4EDEA;
  --luft: #D8E3DF;    /* Raumluft, 21 °C */
  --tinte: #0F2326;
  --gelb: #F2B33D;    /* Sonnenblume, einziger Akzent */

  --s1: 8px; --s2: 16px; --s3: 24px; --s4: 40px; --s5: 64px; --s6: 104px;
  --rand: 20px;
  --breite: 1200px;
  --expo: cubic-bezier(0.19, 1, 0.22, 1);
  --abkuehlen: 1800ms;

  --sans: "Geologica", system-ui, sans-serif;
  --punkt: "Doto", ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font: 400 17px/1.5 var(--sans);
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  font-variation-settings: "SHRP" 100;
  transition: background-color 650ms var(--expo), color 650ms var(--expo), font-variation-settings 650ms var(--expo);
}
body.t4 { background-color: var(--kuehl); color: var(--frost); font-variation-settings: "SHRP" 100; }
body.t21 { background-color: var(--luft); color: var(--tinte); font-variation-settings: "SHRP" 40; }

a { color: inherit; }
p, h1, h2, dl, dd, fieldset { margin: 0; }
:focus-visible { outline: 2px solid var(--gelb); outline-offset: 3px; }

.rand { width: 100%; max-width: calc(var(--breite) + 2 * var(--rand)); margin: 0 auto; padding: 0 var(--rand); }
.t2 { opacity: .68; }
.t3 { opacity: .48; }
.plus { color: var(--gelb); }

/* ---------- Schrift ---------- */
.h1 {
  font-weight: 500;
  font-size: 44px;
  line-height: 1;
  letter-spacing: -0.035em;
}
.h2 {
  font-weight: 480;
  font-size: 36px;
  line-height: 1.05;
  letter-spacing: -0.03em;
}
.text { max-width: 34em; opacity: .92; }
.lead { max-width: 30em; opacity: .68; margin-top: var(--s3); }

.knopf {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 52px; padding: 0 var(--s3);
  border: 0; border-radius: 999px;
  background: var(--gelb); color: var(--tinte);
  font: 500 17px/1 var(--sans); letter-spacing: -0.01em;
  text-decoration: none; cursor: pointer;
  transition: transform 150ms ease-out, background-color 150ms ease-out;
}
.knopf:hover { background: #F6C25E; }
.knopf:active { transform: scale(.98); }

/* ---------- Einstieg ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; flex-direction: column;
  padding-bottom: var(--s4);
  overflow: hidden;
}
.hitze {
  /* warme Kopie des Einstiegs (von main.js/inline eingesetzt), wird von unten weggeschoben */
  position: absolute; inset: 0; z-index: 2;
  display: flex; flex-direction: column;
  padding-bottom: var(--s4);
  background: var(--gelb); color: var(--tinte);
  clip-path: inset(0 0 0 0);
  transition: clip-path var(--abkuehlen) cubic-bezier(0.65, 0, 0.35, 1);
  pointer-events: none;
}
.hitze:empty { display: none; }
.hitze .h1 { font-variation-settings: "SHRP" 0; }
.hitze .plus { color: inherit; }
.kalt .hitze { clip-path: inset(0 0 100% 0); }
.hero > *:not(.hitze) { position: relative; }

.kopf {
  display: flex; justify-content: space-between; align-items: center;
  min-height: 64px;
}
.marke { font-weight: 500; text-decoration: none; letter-spacing: -0.01em; display: inline-flex; align-items: center; min-height: 44px; }
.kopf__mail { text-decoration: none; opacity: .68; display: inline-flex; align-items: center; min-height: 44px; padding-left: var(--s2); transition: opacity 150ms ease-out; }
.kopf__mail:hover { opacity: 1; }

.hero__raster {
  flex: 1;
  display: grid;
  grid-template-rows: auto auto 1fr;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--s4);
  padding-top: var(--s3);
}

/* Regler-Anzeige */
.regler { width: 100%; }
.regler__anzeige { display: flex; align-items: flex-start; }
.regler__zahl {
  font-family: var(--punkt);
  font-weight: 640;
  font-variation-settings: "ROND" 100;
  font-size: 36vw;
  line-height: .82;
  letter-spacing: -0.04em;
  white-space: pre;
  font-variant-numeric: tabular-nums;
}
.regler__einheit {
  font-weight: 400;
  font-size: 22px; line-height: 1;
  margin-left: var(--s1);
  opacity: .68;
}
.skala { position: relative; height: 40px; margin-top: var(--s3); }
.skala__striche {
  position: absolute; left: 0; right: 0; top: 0; height: 12px;
  background: repeating-linear-gradient(to right, currentColor 0 1px, transparent 1px 2.5%);
  opacity: .32;
  border-left: 1px solid transparent;
}
.skala__marke {
  position: absolute; top: -6px; width: 3px; height: 24px; margin-left: -1px;
  background: currentColor; border-radius: 2px;
  left: 90%;
}
.skala__wert {
  position: absolute; top: 20px; transform: translateX(-50%);
  font-size: 13px; line-height: 1; opacity: .48; font-variant-numeric: tabular-nums;
}

.eckdaten { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s3); font-size: 15px; line-height: 1.4; }
.eckdaten dt { opacity: .48; }
.eckdaten dd { opacity: .92; }

.hero__text { align-self: end; }
.hero__text .knopf { margin-top: var(--s4); }

/* Abkühlen beim Laden: html.kalt = fertig */
.js:not(.kalt) .zeile > span { transform: translateY(105%); }
.h1 { font-variation-settings: "SHRP" 100; }
.zeile { display: block; overflow: hidden; padding-bottom: 0.06em; margin-bottom: -0.06em; }
.zeile > span { display: block; transition: transform 1000ms var(--expo); }
.zeile:nth-child(2) > span { transition-delay: 90ms; }
.zeile:nth-child(3) > span { transition-delay: 180ms; }
.skala__marke { transition: left var(--abkuehlen) cubic-bezier(0.65, 0, 0.35, 1); }
.kalt .skala__marke { left: 22.5%; }

/* Kleines Display oben rechts nach dem Einstieg */
.regler-mini {
  position: fixed; top: var(--s2); right: var(--rand); z-index: 50;
  display: flex; align-items: flex-start; gap: 4px;
  padding: var(--s1) var(--s2);
  border-radius: 999px;
  background: inherit;
  box-shadow: 0 0 0 1px color-mix(in srgb, currentColor 22%, transparent);
  font-family: var(--punkt); font-weight: 820; font-variation-settings: "ROND" 100;
  opacity: 0; transform: translateY(-8px);
  transition: opacity 250ms ease-out, transform 250ms ease-out;
  pointer-events: none;
}
.regler-mini.zeigen { opacity: 1; transform: none; }
.regler-mini__zahl { font-size: 22px; line-height: 1; white-space: pre; }
.regler-mini__einheit { font-family: var(--sans); font-size: 12px; line-height: 1; opacity: .68; }

/* ---------- Teile ---------- */
.teil { padding: var(--s5) 0; }
.teil__raster { display: grid; gap: var(--s4); }
.teil__grad {
  font-family: var(--punkt); font-weight: 760; font-variation-settings: "ROND" 100;
  font-size: 120px; line-height: .85; letter-spacing: -0.04em;
  margin-bottom: var(--s3);
}
.teil__kopf .h2 { margin-bottom: var(--s2); }

.folgt { display: grid; border-top: 1px solid color-mix(in srgb, currentColor 22%, transparent); }
.folgt > div {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--s2);
  padding: var(--s2) 0;
  border-bottom: 1px solid color-mix(in srgb, currentColor 22%, transparent);
}
.folgt dt { opacity: .92; }
.folgt dd {
  opacity: .48;
  font-style: normal;
  text-decoration: underline dashed;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.folgt--eng { margin-top: var(--s4); }

/* Inhaber */
.inhaber { display: grid; gap: var(--s4); }
.inhaber__foto {
  aspect-ratio: 4 / 5; max-width: 420px; width: 100%;
  border: 1px dashed color-mix(in srgb, currentColor 40%, transparent);
  border-radius: 8px;
  display: flex; align-items: flex-end; padding: var(--s3);
}
.inhaber__foto span { opacity: .48; font-size: 15px; }
.inhaber__text .h2 { margin-bottom: var(--s3); }

/* Anfrage */
.anfrage { padding-bottom: var(--s6); }
.anfrage__titel { font-size: 44px; letter-spacing: -0.035em; }
.anfrage__intro { margin-top: var(--s2); }
.formular { display: grid; gap: var(--s4); margin-top: var(--s4); max-width: 640px; }
.formular .knopf { justify-self: start; }
.feld { display: grid; gap: var(--s1); }
.feld__name { font-size: 15px; opacity: .68; padding: 0; margin-bottom: var(--s1); }
.feld input, .feld textarea {
  font: 400 17px/1.5 var(--sans); color: inherit;
  background: transparent;
  border: 0; border-bottom: 1px solid color-mix(in srgb, currentColor 40%, transparent);
  border-radius: 0;
  padding: var(--s1) 0;
  resize: vertical;
  transition: border-color 150ms ease-out;
}
.feld input::placeholder, .feld textarea::placeholder { color: inherit; opacity: .4; }
.feld input:focus, .feld textarea:focus { outline: none; border-bottom-color: var(--gelb); }

.chips { border: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--s1); }
.chips legend { float: left; width: 100%; }
.chips label { position: relative; }
.chips input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.chips span {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 var(--s2);
  border-radius: 999px;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, currentColor 32%, transparent);
  transition: background-color 150ms ease-out, color 150ms ease-out, box-shadow 150ms ease-out;
}
.chips input:checked + span { background: var(--frost); color: var(--tinte); box-shadow: none; }
.chips input:focus-visible + span { outline: 2px solid var(--gelb); outline-offset: 3px; }

.direkt { margin-top: var(--s5); padding-top: var(--s4); border-top: 1px solid color-mix(in srgb, currentColor 22%, transparent); display: grid; gap: var(--s2); }
.direkt__mail {
  font-weight: 450; font-size: 36px; line-height: 1.1; letter-spacing: -0.03em;
  text-decoration: none; overflow-wrap: anywhere;
  transition: color 150ms ease-out;
}
.direkt__mail:hover { color: var(--gelb); }

/* Fuss */
.fuss { padding: var(--s5) 0 var(--s4); border-top: 1px solid color-mix(in srgb, currentColor 14%, transparent); }
.fuss__inhalt { display: grid; gap: var(--s2); font-size: 15px; }
.fuss__name { font-weight: 500; font-size: 22px; letter-spacing: -0.02em; }
.fuss a { text-underline-offset: 3px; display: inline-block; min-height: 32px; line-height: 32px; }

/* ---------- Computer ---------- */
@media (min-width: 900px) {
  :root { --rand: 40px; }
  .h1 { font-size: clamp(64px, 6vw, 104px); line-height: .96; }
  .h2 { font-size: 56px; }
  .anfrage__titel { font-size: 88px; }
  .hero__raster {
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: 1fr auto;
    column-gap: var(--s3);
    row-gap: var(--s4);
  }
  .regler { grid-column: 8 / 13; grid-row: 1; align-self: center; }
  .regler__zahl { font-size: min(14vw, 36vh); }
  .regler__einheit { font-size: 28px; }
  .eckdaten { grid-column: 8 / 13; grid-row: 2; align-self: end; }
  .hero__text { grid-column: 1 / 8; grid-row: 1 / 3; }
  .teil { padding: var(--s6) 0; }
  .teil__raster { grid-template-columns: 5fr 7fr; gap: var(--s5); align-items: start; }
  .teil__grad { font-size: 200px; }
  .inhaber { grid-template-columns: 5fr 7fr; gap: var(--s5); align-items: end; }
  .direkt__mail { font-size: 56px; }
  .anfrage .rand { display: grid; grid-template-columns: 7fr 5fr; column-gap: var(--s5); }
  .anfrage__titel, .anfrage__intro, .formular { grid-column: 1; }
  .direkt { grid-column: 2; grid-row: 1 / 4; align-self: end; margin-top: 0; border-top: 0; padding-top: 0; }
}

/* ---------- Ruhig ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0s !important; transition-delay: 0s !important; animation: none !important; }
  .hitze { display: none; }
  .js:not(.kalt) .zeile > span { transform: none; }
}