/* ==========================================================================
   Librebox – main.css
   Material Design 3, monochrom. Headlines: Schibsted Grotesk, Text: Roboto Flex.
   Alle Schriften lokal (assets/fonts), keine externen Requests.
   ========================================================================== */

@font-face {
  font-family: "Schibsted Grotesk";
  src: url("../fonts/schibsted-grotesk-latin-wght-normal.woff2") format("woff2");
  font-weight: 400 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Roboto Flex";
  src: url("../fonts/roboto-flex-latin-wght-normal.woff2") format("woff2");
  font-weight: 100 1000;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Roboto Mono";
  src: url("../fonts/roboto-mono-latin-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Roboto Mono";
  src: url("../fonts/roboto-mono-latin-500-normal.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}

/* ---------- Tokens ---------- */
:root {
  --surface: #ffffff;
  --surface-low: #f6f6f6;
  --surface-mid: #efefef;
  --surface-high: #e6e6e6;
  --on-surface: #111111;
  --on-variant: #4a4a4a;
  --outline: #7a7a7a;
  --outline-variant: #d2d2d2;
  --inverse: #151515;
  --on-inverse: #f3f3f3;
  --inverse-variant: #a9a9a9;
  --accent: var(--on-surface);
  --accent-soft: var(--surface-high);

  --font-display: "Schibsted Grotesk", "Roboto Flex", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Roboto Flex", "Roboto", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Roboto Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --dw: 800;
  --dw2: 700;
  --dtrack: -0.035em;

  --r-xl: 28px;
  --r-l: 16px;
  --max: 1200px;
  --gutter: 16px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface: #111111;
    --surface-low: #1a1a1a;
    --surface-mid: #212121;
    --surface-high: #2b2b2b;
    --on-surface: #ededed;
    --on-variant: #b8b8b8;
    --outline: #8c8c8c;
    --outline-variant: #383838;
    --inverse: #ededed;
    --on-inverse: #141414;
    --inverse-variant: #5a5a5a;
    color-scheme: dark;
  }
}

@media (min-width: 720px) {
  :root { --gutter: 32px; }
}

/* ---------- Basis ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--surface);
  color: var(--on-surface);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
[hidden] { display: none !important; }
a { color: inherit; }
p { margin: 0; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 8px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

.skip {
  position: absolute; left: var(--gutter); top: -100px; z-index: 50;
  background: var(--on-surface); color: var(--surface);
  padding: 10px 16px; border-radius: 999px; text-decoration: none;
}
.skip:focus { top: 12px; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: max(var(--gutter), env(safe-area-inset-left, 0px));
  padding-right: max(var(--gutter), env(safe-area-inset-right, 0px));
}

section { padding-block: 96px; }
section.tight { padding-top: 0; }
@media (max-width: 720px) { section { padding-block: 64px; } }

h1, h2, h3 {
  font-family: var(--font-display);
  margin: 0;
  text-wrap: balance;
}
h2 {
  font-size: clamp(32px, 4.2vw, 48px);
  line-height: 1.08;
  font-weight: var(--dw2);
  letter-spacing: -0.02em;
}
h3 { font-size: 22px; line-height: 1.25; font-weight: 700; letter-spacing: -0.01em; }

.label {
  font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: var(--on-variant);
}
.lead { font-size: 20px; line-height: 1.5; color: var(--on-variant); max-width: 60ch; }
.mono { font-family: var(--font-mono); font-size: 13.5px; }

/* ---------- Buttons (MD3) ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 28px; border-radius: 999px; border: 0;
  font: 600 16px/1 var(--font-body); text-decoration: none; cursor: pointer;
  transition: box-shadow .2s, background-color .2s;
}
.btn-filled { background: var(--on-surface); color: var(--surface); }
.btn-filled:hover { box-shadow: 0 1px 3px rgba(0,0,0,.25), 0 4px 10px rgba(0,0,0,.12); }
.btn-outlined { border: 1px solid var(--outline); color: var(--on-surface); background: transparent; }
.btn-outlined:hover { background: var(--surface-mid); }
.btn-inverse { background: var(--on-inverse); color: var(--inverse); }
.btn-sm { height: 40px; padding: 0 20px; font-size: 14px; }
.align-start { align-self: flex-start; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: var(--surface);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.site-header.scrolled { border-bottom-color: var(--outline-variant); }
.bar { display: flex; align-items: center; gap: 24px; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand .logo { width: 36px; height: auto; flex: none; color: var(--on-surface); }
.brand b { font: var(--dw) 21px/1 var(--font-display); letter-spacing: -0.02em; display: block; }
.brand small { display: block; font-size: 11.5px; color: var(--on-variant); letter-spacing: .04em; margin-top: 3px; }
nav.anchors { display: flex; gap: 4px; margin-left: auto; }
nav.anchors a {
  padding: 10px 14px; border-radius: 999px; text-decoration: none;
  font-size: 15px; font-weight: 500; color: var(--on-variant);
}
nav.anchors a:hover { background: var(--surface-mid); color: var(--on-surface); }
.bar > .btn:last-child { margin-left: auto; }
nav.anchors + .btn { margin-left: 0; }
@media (max-width: 900px) { nav.anchors { display: none; } nav.anchors + .btn { margin-left: auto; } }
@media (max-width: 420px) { .bar .btn-sm { padding: 0 14px; font-size: 13px; } .brand small { display: none; } }

/* ---------- Hero ---------- */
.hero { padding-block: 56px 96px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.hero-grid > * { min-width: 0; }
@media (max-width: 960px) { .hero-grid { grid-template-columns: 1fr; gap: 40px; } }
.chip {
  display: inline-flex; align-items: center; gap: 8px; height: 32px; padding: 0 14px;
  border-radius: 8px; border: 1px solid var(--outline-variant);
  font-size: 14px; font-weight: 500; color: var(--on-variant);
}
.chip .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.hero h1 {
  font-size: clamp(40px, 5.6vw, 68px);
  line-height: 1.02;
  font-weight: var(--dw);
  letter-spacing: var(--dtrack);
  margin-top: 24px;
}
.hero h1 span { display: block; color: var(--on-variant); font-weight: 400; }
.hero .lead { margin-top: 28px; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }

/* Beispiel-Karte */
.device { background: var(--surface-low); border-radius: var(--r-xl); padding: 24px; border: 1px solid var(--outline-variant); }
.device-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.device-top .t { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.device-top .logo { width: 22px; height: auto; color: var(--on-surface); }
.status { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--on-variant); }
.status i { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); display: block; }
.rows { display: grid; gap: 8px; }
.row {
  display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 12px;
  background: var(--surface); border-radius: var(--r-l); padding: 12px 14px;
}
.src {
  font-size: 12px; font-weight: 600; padding: 4px 8px; border-radius: 6px;
  background: var(--surface-mid); color: var(--on-variant); min-width: 64px; text-align: center;
}
.row .name { min-width: 0; }
.row .name .mono { display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.row .name small { display: block; font-size: 12.5px; color: var(--on-variant); }
.done {
  font-size: 12.5px; font-weight: 600; padding: 5px 10px; border-radius: 999px;
  background: var(--accent-soft); color: var(--on-surface); white-space: nowrap;
}
.row.in { animation: slidein .6s ease both; }
@keyframes slidein { from { transform: translateY(-6px); opacity: .4; } to { transform: none; opacity: 1; } }
.device-foot { display: flex; justify-content: space-between; gap: 12px; margin-top: 14px; font-size: 12.5px; color: var(--on-variant); }
@media (max-width: 420px) { .row { grid-template-columns: minmax(0, 1fr) auto; } .row .src { display: none; } }

/* ---------- E-Rechnung-Band ---------- */
.band { background: var(--inverse); color: var(--on-inverse); }
.band .label { color: var(--inverse-variant); }
.band h2 { margin-top: 14px; }
.band-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; align-items: start; }
.band-grid > * { min-width: 0; }
@media (max-width: 900px) { .band-grid { grid-template-columns: 1fr; gap: 36px; } }
.band .lead { color: var(--on-inverse); opacity: .82; margin-top: 20px; }
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li {
  display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 20px; padding: 22px 0;
  border-top: 1px solid color-mix(in srgb, var(--on-inverse) 22%, transparent);
}
.timeline li:last-child { border-bottom: 1px solid color-mix(in srgb, var(--on-inverse) 22%, transparent); }
.timeline .y { font: var(--dw) 34px/1 var(--font-display); letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.timeline b { display: block; font-size: 18px; margin-bottom: 4px; }
.timeline li > span:last-child { opacity: .8; font-size: 15.5px; }
.timeline li > span:last-child b { opacity: 1; }

/* ---------- Ablauf ---------- */
.head { display: grid; gap: 16px; margin-bottom: 56px; max-width: 760px; }
.head-sm { margin-bottom: 40px; }
.flow { display: grid; grid-template-columns: 1fr 56px 1fr 56px 1fr; align-items: stretch; }
.step { background: var(--surface-low); border-radius: var(--r-xl); padding: 32px 28px; display: flex; flex-direction: column; gap: 14px; }
.step .n { font: 600 14px/1 var(--font-mono); color: var(--on-variant); }
.step p { color: var(--on-variant); }
.step ul { margin: 6px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.step li { font-size: 13.5px; padding: 6px 12px; border-radius: 8px; background: var(--surface); border: 1px solid var(--outline-variant); }
.chev { display: flex; align-items: center; justify-content: center; color: var(--on-surface); }
.chev svg { width: 30px; transform: rotate(-90deg); }
@media (max-width: 900px) {
  .flow { grid-template-columns: 1fr; }
  .chev { height: 48px; }
  .chev svg { transform: none; }
}

/* ---------- Versprechen ---------- */
.promise { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--on-surface); }
.promise > div { padding: 32px 32px 8px 0; display: grid; gap: 12px; align-content: start; }
.promise > div + div { padding-left: 32px; border-left: 1px solid var(--outline-variant); }
.promise .word { font: var(--dw) clamp(40px, 5vw, 60px)/1 var(--font-display); letter-spacing: var(--dtrack); }
.promise p { color: var(--on-variant); max-width: 36ch; }
@media (max-width: 860px) {
  .promise { grid-template-columns: 1fr; }
  .promise > div, .promise > div + div { padding: 28px 0 8px; border-left: 0; }
  .promise > div + div { border-top: 1px solid var(--outline-variant); }
}

/* ---------- Karten / Zielgruppen ---------- */
.who { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 960px) { .who { grid-template-columns: 1fr; } }
.card { border-radius: var(--r-xl); padding: 32px; display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.card-filled { background: var(--surface-low); }
.card-outlined { border: 1px solid var(--outline-variant); }
.card-inverse { background: var(--inverse); color: var(--on-inverse); }
.card-inverse .label { color: var(--inverse-variant); }
.card p { color: var(--on-variant); }
.card-inverse p:not(.label) { color: var(--on-inverse); opacity: .8; }
.card ul { margin: 4px 0 0; padding-left: 20px; display: grid; gap: 6px; color: var(--on-variant); }
.card .spacer { flex: 1; }
@media (max-width: 520px) { .card { padding: 24px; } }

/* ---------- Preis ---------- */
.price-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 16px; }
@media (max-width: 900px) { .price-grid { grid-template-columns: 1fr; } }
.price {
  font: var(--dw) clamp(44px, 5.4vw, 64px)/1 var(--font-display);
  letter-spacing: var(--dtrack);
  display: flex; align-items: baseline; flex-wrap: wrap; gap: 12px;
}
.price small { font: 400 17px/1.3 var(--font-body); letter-spacing: 0; color: var(--on-variant); }
.card ul.checks { list-style: none; padding: 0; margin: 8px 0 0; display: grid; gap: 10px; color: var(--on-surface); }
.checks li { display: grid; grid-template-columns: 20px 1fr; gap: 12px; }
.checks li::before {
  content: ""; width: 14px; height: 8px; margin-top: 6px;
  border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}
.price-grid .btn { margin-top: 12px; }

/* ---------- Technik ---------- */
.stack { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; margin-top: 8px; }
@media (max-width: 860px) { .stack { grid-template-columns: 1fr; gap: 28px; } }
.stack > div { display: grid; gap: 8px; align-content: start; padding-top: 20px; border-top: 1px solid var(--outline-variant); }
.stack p { color: var(--on-variant); }
.libre {
  margin-top: 56px; background: var(--surface-low); border-radius: var(--r-xl); padding: 28px 32px;
  display: grid; grid-template-columns: auto 1fr; gap: 24px; align-items: center;
}
.libre .big { font: 400 44px/1 var(--font-display); letter-spacing: -0.03em; }
@media (max-width: 600px) { .libre { grid-template-columns: 1fr; padding: 24px; } }

/* ---------- FAQ ---------- */
.faq { max-width: 860px; border-top: 1px solid var(--outline-variant); }
.faq details { border-bottom: 1px solid var(--outline-variant); }
.faq summary {
  list-style: none; cursor: pointer; position: relative;
  padding: 22px 48px 22px 0; font-size: 19px; font-weight: 600;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 8px; top: 30px; width: 10px; height: 10px;
  border-right: 2px solid var(--on-surface); border-bottom: 2px solid var(--on-surface);
  transform: rotate(45deg); transition: transform .2s;
}
.faq details[open] summary::after { transform: rotate(-135deg); top: 34px; }
.faq details p { padding: 0 48px 24px 0; color: var(--on-variant); max-width: 68ch; }

/* ---------- Abschluss ---------- */
.final { background: var(--inverse); color: var(--on-inverse); }
.final .label { color: var(--inverse-variant); }
.final-grid { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: end; }
.final-grid > * { min-width: 0; }
@media (max-width: 860px) { .final-grid { grid-template-columns: 1fr; } }
.final h2 { margin-top: 16px; font-size: clamp(40px, 6vw, 76px); line-height: 1; letter-spacing: var(--dtrack); font-weight: var(--dw); }
.final .claim { margin-top: 24px; font-size: 20px; opacity: .8; max-width: 52ch; }
.contact { display: grid; gap: 14px; justify-items: start; }
.contact .mono { font-size: 15px; opacity: .85; user-select: all; }

/* ---------- Footer ---------- */
.site-footer { padding-block: 40px; font-size: 14px; color: var(--on-variant); }
.foot { display: flex; flex-wrap: wrap; gap: 16px 32px; align-items: center; justify-content: space-between; }
.foot .brand .logo { width: 28px; }
.foot .brand b { font-size: 17px; color: var(--on-surface); }
.foot nav { display: flex; gap: 20px; }

/* ---------- Textseiten (Impressum, Datenschutz) ---------- */
.text-page { padding-block: 64px 96px; }
.prose { max-width: 68ch; }
.prose h1 { font-size: clamp(36px, 5vw, 56px); line-height: 1.05; font-weight: var(--dw); letter-spacing: var(--dtrack); margin-bottom: 32px; }
.prose h2 { font-size: 26px; margin: 40px 0 12px; }
.prose h3 { margin: 28px 0 8px; }
.prose p { margin: 0 0 16px; color: var(--on-variant); }
.prose ul, .prose ol { color: var(--on-variant); padding-left: 22px; }