/* Aderplan – Landingpage. Anthrazit + Kupfer (Leitermaterial), Montserrat für Überschriften, Inter für Text.
   Aufbau: dunkler Kopfbereich mit Planansicht, darunter helle Abschnitte. Schriften liegen auf dem eigenen Server. */
@font-face { font-family: "Montserrat"; font-weight: 600; font-style: normal; font-display: swap; src: url("/assets/fonts/montserrat-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "Montserrat"; font-weight: 700; font-style: normal; font-display: swap; src: url("/assets/fonts/montserrat-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 400; font-style: normal; font-display: swap; src: url("/assets/fonts/inter-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 600; font-style: normal; font-display: swap; src: url("/assets/fonts/inter-latin-600-normal.woff2") format("woff2"); }

:root {
  --ink: #13202B; --ink-2: #1B2B38; --ink-3: #243746; --ink-line: #2C4152;
  --bg: #F5F6F8; --surface: #FFFFFF; --line: #DCE2E7; --fg: #13202B; --muted: #566470; --muted-ink: #A7B4BE;
  --kupfer: #C46A2F; --kupfer-hell: #E58B4E; --kupfer-text: #9E4F1C; --kupfer-zart: #FBEFE6;
  --display: "Montserrat", "Segoe UI", Arial, sans-serif;
  --body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --wrap: 1160px;
  color-scheme: light;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 var(--body); -webkit-font-smoothing: antialiased; }
img, svg { max-width: 100%; }
h1, h2, h3 { font-family: var(--display); line-height: 1.15; margin: 0; text-wrap: balance; letter-spacing: -0.015em; }
p { margin: 0; text-wrap: pretty; }
a { color: var(--kupfer-text); }
:focus-visible { outline: 3px solid var(--kupfer-hell); outline-offset: 3px; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding-left: max(20px, env(safe-area-inset-left, 0px)); padding-right: max(20px, env(safe-area-inset-right, 0px)); }

/* Kopfzeile */
.top { position: sticky; top: 0; z-index: 30; background: rgba(255, 255, 255, .94); backdrop-filter: saturate(160%) blur(10px); -webkit-backdrop-filter: saturate(160%) blur(10px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 28px; min-height: 68px; }
.brand { display: flex; align-items: center; flex: none; }
.brand img { display: block; height: 30px; width: auto; }
.nav { display: flex; gap: 24px; font-size: .95rem; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 600; }
.nav a:hover { color: var(--fg); }
.actions { margin-left: auto; display: flex; gap: 10px; align-items: center; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 42px; padding: 9px 18px; border-radius: 8px; border: 1px solid transparent;
  font: 600 .95rem/1 var(--body); text-decoration: none; white-space: nowrap; cursor: pointer; transition: background-color .15s, border-color .15s, color .15s; }
.btn-primary { background: var(--kupfer); color: #FFFFFF; }
.btn-primary:hover { background: #AE5C26; }
.btn-ghost { color: var(--fg); border-color: var(--line); background: var(--surface); }
.btn-ghost:hover { border-color: var(--fg); }
.btn-lg { min-height: 50px; padding: 13px 24px; font-size: 1rem; }
.hero .btn-ghost { background: transparent; color: #FFFFFF; border-color: var(--ink-line); }
.hero .btn-ghost:hover { border-color: #FFFFFF; }
@media (max-width: 860px) { .nav { display: none; } }
@media (max-width: 420px) { .top .wrap { gap: 12px; } .brand img { height: 24px; } .actions .btn { padding: 8px 12px; min-height: 38px; font-size: .88rem; } }

/* Kopfbereich mit Planansicht */
.hero { background: var(--ink); color: #FFFFFF; overflow: hidden; position: relative; }
.hero::before { content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--ink-2) 1px, transparent 1px), linear-gradient(90deg, var(--ink-2) 1px, transparent 1px);
  background-size: 32px 32px; opacity: .55; }
.hero .wrap { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr); gap: 56px; align-items: center; padding-top: 80px; padding-bottom: 88px; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font: 600 .78rem/1 var(--body); letter-spacing: .14em; text-transform: uppercase; color: var(--kupfer-hell); }
.eyebrow::before { content: ""; width: 26px; height: 3px; border-radius: 2px; background: var(--kupfer-hell); }
.hero h1 { margin-top: 18px; font-size: clamp(2.2rem, 4.6vw, 3.5rem); font-weight: 700; }
.hero h1 span { color: var(--kupfer-hell); }
.lead { margin-top: 22px; font-size: 1.15rem; color: var(--muted-ink); max-width: 36em; }
.cta { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }
.facts { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 8px 22px; padding: 0; list-style: none; font-size: .9rem; color: var(--muted-ink); }
.facts li { display: flex; align-items: center; gap: 8px; }
.facts li::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--kupfer-hell); }
.planview { border-radius: 14px; background: #F7F8FA; box-shadow: 0 30px 80px rgba(0, 0, 0, .45), 0 0 0 1px rgba(255, 255, 255, .06); overflow: hidden; }
.planview svg { display: block; width: 100%; height: auto; }
@media (max-width: 960px) { .hero .wrap { grid-template-columns: minmax(0, 1fr); gap: 44px; padding-top: 56px; padding-bottom: 64px; } }

/* Planansicht-Grafik */
.pv-bar { fill: #FFFFFF; }
.pv-barline { stroke: #E3E8EC; }
.pv-bartext { fill: #566470; font: 600 11px var(--body); }
.pv-tool { fill: #EEF1F4; }
.pv-tool.on { fill: var(--kupfer-zart); stroke: var(--kupfer); }
.pv-grid { stroke: #E9EDF0; }
.pv-wall { fill: none; stroke: #2A3A47; stroke-width: 7; stroke-linecap: square; }
.pv-room { fill: #9AA6B0; font: 600 11px var(--body); }
.pv-sym { fill: #FFFFFF; stroke: #13202B; stroke-width: 1.8; }
.pv-line { fill: none; stroke: #13202B; stroke-width: 1.8; stroke-linecap: round; }
.pv-dot { fill: #13202B; }
.pv-wire { fill: none; stroke: var(--kupfer); stroke-width: 2.4; stroke-linejoin: round; stroke-linecap: round; }
.pv-wire.n2 { stroke-dasharray: 6 4; }
.pv-label { fill: var(--kupfer-text); font: 600 9.5px var(--body); paint-order: stroke; stroke: #F7F8FA; stroke-width: 4px; stroke-linejoin: round; }
.pv-dim { stroke: #8795A0; stroke-width: 1; fill: none; }
.pv-dimtext { fill: #566470; font: 600 10px var(--body); }
.pv-card { fill: #FFFFFF; stroke: #DCE2E7; filter: drop-shadow(0 6px 14px rgba(19, 32, 43, .14)); }
.pv-cardtitle { fill: #13202B; font: 700 11.5px var(--display); }
.pv-cardtext { fill: #566470; font: 400 10.5px var(--body); }
.pv-cardval { fill: #13202B; font: 600 10.5px var(--body); }
.pv-uv { fill: #13202B; }
.pv-uvtext { fill: #FFFFFF; font: 700 9px var(--body); }

/* Abschnitte */
section.band { padding: 96px 0; }
section.band.weiss { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.head { max-width: 680px; }
.head h2 { font-size: clamp(1.75rem, 3vw, 2.4rem); font-weight: 700; }
.head p { margin-top: 14px; color: var(--muted); font-size: 1.08rem; }
.kicker { display: block; margin-bottom: 12px; font: 600 .78rem/1 var(--body); letter-spacing: .14em; text-transform: uppercase; color: var(--kupfer-text); }

/* Ablauf */
.steps { margin: 48px 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; counter-reset: s; border-top: 2px solid var(--fg); }
.steps li { position: relative; padding: 26px 24px 0 0; counter-increment: s; }
.steps li::before { content: "0" counter(s); display: block; font: 700 .9rem/1 var(--display); color: var(--kupfer-text); margin-bottom: 14px; }
.steps li::after { content: ""; position: absolute; top: -7px; left: 0; width: 12px; height: 12px; border-radius: 50%; background: var(--kupfer); box-shadow: 0 0 0 4px var(--bg); }
.steps h3 { font-size: 1.12rem; font-weight: 700; }
.steps p { margin-top: 8px; color: var(--muted); font-size: .98rem; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 36px; } }
@media (max-width: 560px) { .steps { grid-template-columns: minmax(0, 1fr); } }

/* Funktionen */
.features { margin-top: 48px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.feature { background: var(--surface); padding: 28px 26px 30px; display: flex; flex-direction: column; gap: 10px; }
.feature svg { width: 34px; height: 34px; flex: none; }
.feature h3 { font-size: 1.05rem; font-weight: 700; margin-top: 6px; }
.feature p { color: var(--muted); font-size: .96rem; }
.ic { fill: none; stroke: var(--fg); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.ic-k { fill: none; stroke: var(--kupfer); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.ic-kf { fill: var(--kupfer); }
@media (max-width: 960px) { .features { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .features { grid-template-columns: minmax(0, 1fr); } }

/* Team */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: start; }
.roles { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.roles li { display: grid; grid-template-columns: 128px minmax(0, 1fr); gap: 14px; align-items: baseline; padding: 14px 18px; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; }
.roles b { font-family: var(--display); font-weight: 700; }
.roles span { color: var(--muted); font-size: .95rem; }
.checks { margin: 28px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.checks li { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 12px; color: var(--fg); }
.checks li::before { content: ""; width: 18px; height: 18px; margin-top: 3px; border-radius: 50%; background: var(--kupfer-zart); box-shadow: inset 0 0 0 5px var(--kupfer); }
@media (max-width: 900px) { .split { grid-template-columns: minmax(0, 1fr); gap: 36px; } }
@media (max-width: 480px) { .roles li { grid-template-columns: minmax(0, 1fr); gap: 2px; } }

/* Fragen */
.faq { margin-top: 40px; display: grid; gap: 10px; max-width: 820px; }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 0 20px; }
.faq summary { cursor: pointer; list-style: none; padding: 18px 28px 18px 0; position: relative; font-weight: 600; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 14px; font: 600 1.4rem/1 var(--body); color: var(--kupfer-text); }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding: 0 0 18px; color: var(--muted); }

/* Abschluss */
.closing { background: var(--ink); color: #FFFFFF; padding: 84px 0; }
.closing .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 28px; }
.closing h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); font-weight: 700; }
.closing p { margin-top: 10px; color: var(--muted-ink); }
.closing .btn-ghost { background: transparent; color: #FFFFFF; border-color: var(--ink-line); }
.closing .btn-ghost:hover { border-color: #FFFFFF; }

/* Fußzeile */
.foot { background: var(--ink); color: var(--muted-ink); border-top: 1px solid var(--ink-line); padding: 32px 0 calc(32px + env(safe-area-inset-bottom, 0px)); font-size: .9rem; }
.foot .wrap { display: flex; flex-wrap: wrap; gap: 14px 28px; align-items: center; justify-content: space-between; }
.foot img { height: 24px; width: auto; display: block; }
.foot nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.foot a { color: var(--muted-ink); text-decoration: none; }
.foot a:hover { color: #FFFFFF; }

/* Unterseiten (Rechtliches, Anmelden, Registrieren) */
.page { padding: 64px 0 96px; }
.page .wrap { max-width: 820px; }
.page h1 { font-size: clamp(1.9rem, 3.4vw, 2.6rem); font-weight: 700; }
.page h2 { font-size: 1.2rem; margin-top: 36px; }
.page p, .page li, .page dd { color: #2E3C47; }
.page p { margin-top: 12px; }
.page .intro { margin-top: 14px; font-size: 1.1rem; color: var(--muted); }
.page dl { margin: 12px 0 0; display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 6px 18px; }
.page dt { font-weight: 600; }
.page dd { margin: 0; }
.page ul { margin: 10px 0 0; padding-left: 22px; }
.page .stand { margin-top: 40px; color: var(--muted); font-size: .9rem; }
@media (max-width: 560px) { .page dl { grid-template-columns: minmax(0, 1fr); gap: 2px; } .page dd { margin-bottom: 10px; } }
.box { margin-top: 28px; padding: 26px 28px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; }
.box h2 { margin-top: 0; }
.contact { margin-top: 16px; display: grid; gap: 10px; }
.contact a { font-weight: 600; font-size: 1.05rem; }
.hinweis { margin-top: 18px; padding: 14px 16px; border-left: 3px solid var(--kupfer); background: var(--kupfer-zart); border-radius: 0 8px 8px 0; color: #4A3020; }

/* Preise */
.preise { margin-top: 44px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.preis { position: relative; display: flex; flex-direction: column; gap: 6px; padding: 28px 26px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; }
.preis.empfohlen { border-color: var(--kupfer); box-shadow: 0 0 0 1px var(--kupfer); }
.preis .marke { position: absolute; top: -12px; left: 24px; padding: 4px 10px; border-radius: 999px; background: var(--kupfer); color: #FFFFFF; font: 600 .75rem/1 var(--body); letter-spacing: .04em; }
.preis h3 { font-size: 1.3rem; font-weight: 700; }
.preis .fuer { color: var(--muted); font-size: .95rem; }
.preis .betrag { margin-top: 14px; font: 700 2.2rem/1 var(--display); letter-spacing: -0.02em; }
.preis .betrag small { font: 400 .95rem var(--body); color: var(--muted); letter-spacing: 0; }
.preis .jahr { color: var(--muted); font-size: .9rem; }
.preis ul { margin: 16px 0 22px; padding: 0; list-style: none; display: grid; gap: 8px; font-size: .96rem; }
.preis li { display: grid; grid-template-columns: 18px minmax(0, 1fr); gap: 10px; }
.preis li::before { content: ""; width: 14px; height: 14px; margin-top: 5px; border-radius: 50%; background: var(--kupfer-zart); box-shadow: inset 0 0 0 4px var(--kupfer); }
.preis .btn { margin-top: auto; }
.preis-info { margin-top: 22px; color: var(--muted); font-size: .95rem; max-width: 820px; }
@media (max-width: 900px) { .preise { grid-template-columns: minmax(0, 1fr); max-width: 520px; } }

/* Formulare (Anmelden, Registrieren) */
.konto { padding: 56px 0 96px; }
.konto .wrap { max-width: 880px; }
.konto.schmal .wrap { max-width: 480px; }
.konto h1 { font-size: clamp(1.8rem, 3.2vw, 2.4rem); font-weight: 700; }
.konto .intro { margin-top: 12px; color: var(--muted); font-size: 1.05rem; }
.formbox { margin-top: 28px; padding: 30px 30px 32px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 12px 40px rgba(19, 32, 43, .06); }
.formbox h2 { font-size: 1.1rem; font-weight: 700; margin: 0 0 4px; }
.formbox h2:not(:first-child) { margin-top: 30px; }
.formbox .unter { color: var(--muted); font-size: .92rem; }
.felder { margin-top: 16px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 18px; }
.felder .breit { grid-column: 1 / -1; }
.feld label { display: block; margin-bottom: 6px; font-weight: 600; font-size: .92rem; }
.feld input { width: 100%; min-height: 46px; padding: 10px 13px; border: 1px solid #C5CED6; border-radius: 8px; background: #FFFFFF; color: var(--fg); font: 400 1rem var(--body); }
.feld input:focus { outline: none; border-color: var(--kupfer); box-shadow: 0 0 0 3px rgba(196, 106, 47, .22); }
.feld input[aria-invalid="true"] { border-color: #B42318; }
.feld .tip { margin-top: 5px; color: var(--muted); font-size: .82rem; }
.feld .feldfehler { margin-top: 5px; color: #B42318; font-size: .85rem; font-weight: 600; }
.feld .feldfehler:empty { display: none; }
@media (max-width: 640px) { .felder { grid-template-columns: minmax(0, 1fr); } .formbox { padding: 22px 18px 24px; } }

.tarifwahl { margin: 16px 0 0; padding: 0; border: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.tarifwahl legend { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.tarif { position: relative; display: block; cursor: pointer; padding: 16px 16px 14px; border: 1px solid #C5CED6; border-radius: 10px; background: #FFFFFF; transition: border-color .15s, box-shadow .15s; }
.tarif input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.tarif b { display: block; font: 700 1.1rem var(--display); }
.tarif .fuer { display: block; color: var(--muted); font-size: .85rem; }
.tarif .p { display: block; margin-top: 10px; font-weight: 600; }
.tarif .n { display: block; color: var(--muted); font-size: .85rem; }
.tarif:hover { border-color: var(--fg); }
.tarif:has(input:checked) { border-color: var(--kupfer); box-shadow: 0 0 0 1px var(--kupfer); background: #FFFBF8; }
.tarif:has(input:focus-visible) { outline: 3px solid var(--kupfer-hell); outline-offset: 2px; }
@media (max-width: 640px) { .tarifwahl { grid-template-columns: minmax(0, 1fr); } }

.umschalter { margin-top: 14px; display: inline-flex; padding: 3px; border: 1px solid var(--line); border-radius: 9px; background: var(--bg); }
.umschalter label { position: relative; padding: 7px 14px; border-radius: 7px; font-size: .9rem; font-weight: 600; color: var(--muted); cursor: pointer; }
.umschalter input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.umschalter label:has(input:checked) { background: #FFFFFF; color: var(--fg); box-shadow: 0 1px 3px rgba(19, 32, 43, .14); }
.umschalter label:has(input:focus-visible) { outline: 3px solid var(--kupfer-hell); outline-offset: 1px; }
.umschalter .spar { color: var(--kupfer-text); font-weight: 600; }

.haken { margin-top: 14px; display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 10px; align-items: start; font-size: .95rem; color: #2E3C47; }
.haken input { width: 18px; height: 18px; margin: 3px 0 0; accent-color: var(--kupfer); }
.meldung { margin-top: 20px; padding: 12px 14px; border-radius: 8px; border: 1px solid #F1B5AE; background: #FEF3F2; color: #912018; font-size: .95rem; }
.meldung.gut { border-color: #B7DFC5; background: #F0FAF3; color: #1D5B33; }
.meldung[hidden] { display: none; }
.absenden { margin-top: 24px; width: 100%; }
.absenden[disabled] { opacity: .65; cursor: progress; }
.unterzeile { margin-top: 18px; text-align: center; color: var(--muted); font-size: .95rem; }
.testinfo { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 6px 20px; padding: 0; list-style: none; color: var(--muted); font-size: .9rem; }
.testinfo li { display: flex; align-items: center; gap: 8px; }
.testinfo li::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--kupfer); }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn { transition: none; } }