/* ==========================================================================
   einfache-rechnungen.de — „Amtliches Formular, radikal aufgeräumt"
   Papier, Tinte, ein Stempel. Keine externen Assets.
   ========================================================================== */

@font-face {
  font-family: "Plex Serif";
  src: url("fonts/PlexSerif-SemiBold.woff2") format("woff2");
  font-weight: 600; font-display: swap;
}
@font-face {
  font-family: "Plex Serif";
  src: url("fonts/PlexSerif-Text.woff2") format("woff2");
  font-weight: 450; font-display: swap;
}
@font-face {
  font-family: "Plex Sans";
  src: url("fonts/PlexSans-Regular.woff2") format("woff2");
  font-weight: 400; font-display: swap;
}
@font-face {
  font-family: "Plex Sans";
  src: url("fonts/PlexSans-Medium.woff2") format("woff2");
  font-weight: 500; font-display: swap;
}
@font-face {
  font-family: "Plex Mono";
  src: url("fonts/PlexMono-Regular.woff2") format("woff2");
  font-weight: 400; font-display: swap;
}

:root {
  --papier: #f6f3ec;
  --papier-hell: #fbf9f4;
  --tinte: #1b1a18;
  --tinte-60: rgba(27, 26, 24, 0.62);
  --tinte-35: rgba(27, 26, 24, 0.35);
  --blau: #2036c8;
  --blau-dunkel: #172a9e;
  --blau-hauch: rgba(32, 54, 200, 0.07);
  --gruen: #1e7a3c;
  --rot: #c03a2b;
  --linie: #d9d3c6;
  --linie-zart: #e7e2d6;
  --serif: "Plex Serif", "Iowan Old Style", Georgia, serif;
  --sans: "Plex Sans", "Segoe UI", -apple-system, sans-serif;
  --mono: "Plex Mono", "SF Mono", Consolas, monospace;
  --rand: 2px solid var(--tinte);
  --schatten: 6px 6px 0 rgba(27, 26, 24, 0.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--tinte);
  background-color: var(--papier);
  /* Feines Formularraster + Papierkorn */
  background-image:
    repeating-linear-gradient(0deg, transparent 0 31px, rgba(27,26,24,0.035) 31px 32px),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--blau); color: var(--papier-hell); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* --------------------------------------------------------------------------
   Kopfzeile — wie der Briefkopf eines Formulars
   -------------------------------------------------------------------------- */
.kopf {
  position: sticky; top: 0; z-index: 50;
  background: var(--papier);
  border-bottom: var(--rand);
}
.kopf-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; max-width: 1120px; margin: 0 auto;
}
.wortmarke {
  font-family: var(--serif); font-weight: 600; font-size: 1.15rem;
  text-decoration: none; color: var(--tinte); letter-spacing: -0.01em;
}
.wortmarke .punkt { color: var(--blau); }
.nav { display: flex; gap: 28px; align-items: center; }
.nav a {
  color: var(--tinte-60); text-decoration: none; font-size: 0.92rem; font-weight: 500;
}
.nav a:hover { color: var(--blau); }
.nav .cta {
  color: var(--papier-hell); background: var(--tinte);
  padding: 9px 18px; border: var(--rand);
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
}
.nav .cta:hover {
  color: var(--papier-hell); background: var(--blau);
  transform: translate(-2px, -2px); box-shadow: 4px 4px 0 rgba(27,26,24,0.25);
}
@media (max-width: 720px) { .nav a:not(.cta) { display: none; } }

/* --------------------------------------------------------------------------
   Hero — Aktenzeichen oben, große Serif-Ansage, Formular-Verwandlung rechts
   -------------------------------------------------------------------------- */
.hero { padding: 72px 0 64px; overflow: hidden; }
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 56px; align-items: center;
}
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }

.aktenzeichen {
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--blau);
  display: inline-flex; align-items: center; gap: 10px;
  border: 1px solid var(--blau); padding: 6px 12px;
  background: var(--blau-hauch);
}
.aktenzeichen::before { content: "§"; font-size: 0.95rem; }

.hero h1 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(2.9rem, 7vw, 5rem);
  line-height: 1.02; letter-spacing: -0.025em;
  margin: 26px 0 22px;
}
.hero h1 .blau { color: var(--blau); }
.hero .claim {
  font-size: 1.22rem; color: var(--tinte-60); max-width: 34em;
  font-family: var(--serif); font-weight: 450;
}
.hero .claim strong { color: var(--tinte); font-weight: 600; }

.hero-buttons { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.btn {
  font-family: var(--sans); font-weight: 500; font-size: 1rem;
  text-decoration: none; cursor: pointer;
  padding: 14px 26px; border: var(--rand);
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}
.btn-voll { background: var(--blau); color: var(--papier-hell); border-color: var(--tinte); }
.btn-voll:hover { transform: translate(-2px,-2px); box-shadow: var(--schatten); background: var(--blau-dunkel); }
.btn-leer { background: transparent; color: var(--tinte); }
.btn-leer:hover { background: var(--papier-hell); transform: translate(-2px,-2px); box-shadow: var(--schatten); }

/* Die Verwandlung: chaotisches Formular -> geprüftes Dokument */
.verwandlung { position: relative; min-height: 420px; }
.dok {
  position: absolute; width: 78%;
  background: var(--papier-hell); border: var(--rand);
  padding: 22px; font-family: var(--mono); font-size: 0.72rem;
  line-height: 1.9; color: var(--tinte-60);
}
.dok .dok-titel {
  font-family: var(--sans); font-weight: 500; font-size: 0.8rem;
  color: var(--tinte); border-bottom: 1px solid var(--linie);
  padding-bottom: 8px; margin-bottom: 10px;
  display: flex; justify-content: space-between; align-items: center;
}
.dok-alt {
  top: 0; left: 0; transform: rotate(-3deg);
  box-shadow: var(--schatten);
}
.dok-alt .krakel { color: var(--rot); text-decoration: line-through wavy; }
.dok-alt .fehlt { background: rgba(192,58,43,0.12); color: var(--rot); padding: 0 4px; }
.dok-neu {
  bottom: 0; right: 0; transform: rotate(1.5deg);
  box-shadow: 10px 10px 0 rgba(32,54,200,0.14);
  z-index: 2;
}
.dok-neu .zeile { display: flex; justify-content: space-between; }
.dok-neu .ok { color: var(--gruen); }

.stempel {
  position: absolute; right: -10px; top: -22px; z-index: 3;
  transform: rotate(8deg);
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--gruen); text-align: center;
  border: 3px double var(--gruen); border-radius: 6px;
  padding: 8px 14px; line-height: 1.5;
  background: rgba(30,122,60,0.06);
  animation: stempeln 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) 0.9s backwards;
}
@keyframes stempeln {
  from { transform: rotate(8deg) scale(2.4); opacity: 0; }
  to   { transform: rotate(8deg) scale(1); opacity: 1; }
}
.pfeil-blau {
  position: absolute; left: 46%; top: 44%; z-index: 3;
  font-family: var(--serif); font-size: 2rem; color: var(--blau);
  transform: rotate(12deg);
}

/* --------------------------------------------------------------------------
   Vertrauensband
   -------------------------------------------------------------------------- */
.band {
  border-top: var(--rand); border-bottom: var(--rand);
  background: var(--tinte); color: var(--papier);
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 12px 0; white-space: nowrap; overflow: hidden;
}
.band .wrap { display: flex; gap: 0; justify-content: space-between; flex-wrap: wrap; row-gap: 6px; }
.band span::after { content: "·"; margin: 0 14px; color: var(--blau); }
.band span:last-child::after { content: ""; }
@media (max-width: 900px) { .band .wrap { justify-content: center; gap: 0 8px; } }

/* --------------------------------------------------------------------------
   Sektionen
   -------------------------------------------------------------------------- */
section { padding: 88px 0; }
.sektions-kopf { margin-bottom: 48px; max-width: 40em; }
.feldnummer {
  font-family: var(--mono); font-size: 0.78rem; color: var(--blau);
  letter-spacing: 0.14em; text-transform: uppercase; display: block; margin-bottom: 12px;
}
h2 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(1.9rem, 4vw, 2.7rem); line-height: 1.12; letter-spacing: -0.02em;
}
.sektions-kopf p { margin-top: 14px; color: var(--tinte-60); font-size: 1.08rem; }

/* Drei Schritte */
.schritte { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: var(--rand); background: var(--papier-hell); }
@media (max-width: 820px) { .schritte { grid-template-columns: 1fr; } }
.schritt { padding: 30px 28px; border-right: 1px solid var(--linie); position: relative; }
.schritt:last-child { border-right: none; }
@media (max-width: 820px) { .schritt { border-right: none; border-bottom: 1px solid var(--linie); } .schritt:last-child { border-bottom: none; } }
.schritt .nr {
  font-family: var(--serif); font-weight: 600; font-size: 2.6rem; color: var(--blau);
  line-height: 1; margin-bottom: 14px;
}
.schritt h3 { font-family: var(--sans); font-weight: 500; font-size: 1.05rem; margin-bottom: 8px; }
.schritt p { color: var(--tinte-60); font-size: 0.95rem; }

.codeblock {
  margin-top: 28px; border: var(--rand); background: var(--tinte);
  color: #e8e4da; font-family: var(--mono); font-size: 0.85rem;
  padding: 24px 26px; overflow-x: auto; position: relative;
  line-height: 1.75; box-shadow: var(--schatten);
}
.codeblock .c-blau { color: #8fa2ff; }
.codeblock .c-gruen { color: #7fd49a; }
.codeblock .c-grau { color: rgba(232,228,218,0.5); }
.copy-btn {
  position: absolute; top: 12px; right: 12px;
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.08em;
  background: transparent; color: rgba(232,228,218,0.6);
  border: 1px solid rgba(232,228,218,0.3); padding: 5px 10px; cursor: pointer;
}
.copy-btn:hover { color: var(--papier-hell); border-color: var(--papier-hell); }

/* --------------------------------------------------------------------------
   USP: Rechnung statt Seite
   -------------------------------------------------------------------------- */
.vergleich { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
@media (max-width: 820px) { .vergleich { grid-template-columns: 1fr; } }
.v-karte { border: var(--rand); padding: 34px 32px; background: var(--papier-hell); position: relative; }
.v-karte.anders { transform: rotate(-0.6deg); color: var(--tinte-60); }
.v-karte.wir { transform: rotate(0.4deg); box-shadow: 10px 10px 0 rgba(32,54,200,0.14); }
.v-karte .v-label {
  font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.14em;
  text-transform: uppercase; margin-bottom: 18px; display: block;
}
.v-karte.anders .v-label { color: var(--rot); }
.v-karte.wir .v-label { color: var(--blau); }
.v-karte .v-zahl { font-family: var(--serif); font-weight: 600; font-size: 2.1rem; line-height: 1.15; letter-spacing: -0.02em; }
.v-karte p { margin-top: 12px; font-size: 0.98rem; }
.v-karte.wir .v-zahl { color: var(--tinte); }

/* --------------------------------------------------------------------------
   Preise — Preisschilder mit Lochrand
   -------------------------------------------------------------------------- */
.preise-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; align-items: stretch; }
@media (max-width: 1000px) { .preise-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .preise-grid { grid-template-columns: 1fr; } }

.plan {
  border: var(--rand); background: var(--papier-hell);
  padding: 30px 26px 26px; display: flex; flex-direction: column; position: relative;
  transition: transform 0.18s, box-shadow 0.18s;
}
.plan:hover { transform: translate(-3px, -3px); box-shadow: var(--schatten); }
.plan.beliebt { outline: 3px solid var(--blau); outline-offset: -3px; }
.plan .beliebt-stempel {
  position: absolute; top: -14px; right: 14px; transform: rotate(6deg);
  font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.14em;
  color: var(--blau); border: 2px double var(--blau); border-radius: 4px;
  padding: 4px 9px; background: var(--papier-hell); text-transform: uppercase;
}
.plan h3 { font-family: var(--sans); font-weight: 500; font-size: 1rem; letter-spacing: 0.02em; text-transform: uppercase; }
.plan .preis { font-family: var(--serif); font-weight: 600; font-size: 2.5rem; letter-spacing: -0.02em; margin: 14px 0 2px; }
.plan .preis small { font-size: 1rem; font-weight: 450; color: var(--tinte-60); font-family: var(--sans); }
.plan ul { list-style: none; margin: 20px 0 26px; flex: 1; }
.plan li {
  font-size: 0.92rem; padding: 8px 0; border-bottom: 1px dashed var(--linie);
  display: flex; justify-content: space-between; gap: 12px;
}
.plan li strong { font-family: var(--mono); font-weight: 400; white-space: nowrap; }
.plan .btn { text-align: center; width: 100%; }
.plan form { display: flex; flex-direction: column; gap: 10px; }
.plan input[type="email"] {
  font-family: var(--mono); font-size: 0.88rem; padding: 11px 12px;
  border: var(--rand); background: var(--papier); color: var(--tinte); width: 100%;
}
.plan input[type="email"]:focus { outline: 2px solid var(--blau); outline-offset: 1px; }

.preise-fussnote { margin-top: 26px; font-size: 0.88rem; color: var(--tinte-60); font-family: var(--mono); }

/* Key-Panel (Free-Signup-Ergebnis, danke.html) */
.key-panel {
  border: var(--rand); background: var(--papier-hell); box-shadow: var(--schatten);
  padding: 34px; margin-top: 30px; max-width: 720px;
}
.key-panel h3 { font-family: var(--serif); font-weight: 600; font-size: 1.5rem; margin-bottom: 8px; }
.key-anzeige {
  font-family: var(--mono); font-size: 0.95rem; word-break: break-all;
  border: 2px dashed var(--blau); background: var(--blau-hauch);
  padding: 16px 18px; margin: 18px 0; position: relative;
}
.warnung {
  display: flex; gap: 10px; font-size: 0.92rem; color: var(--rot);
  border-left: 4px solid var(--rot); padding: 10px 14px; background: rgba(192,58,43,0.06);
}
.hinweis { font-size: 0.92rem; color: var(--tinte-60); margin-top: 14px; }

/* --------------------------------------------------------------------------
   Coreventa-Block
   -------------------------------------------------------------------------- */
.service {
  border: var(--rand); background: var(--tinte); color: var(--papier);
  padding: 52px 48px; display: grid; grid-template-columns: 2fr 1fr;
  gap: 36px; align-items: center; box-shadow: 12px 12px 0 rgba(32,54,200,0.25);
}
@media (max-width: 820px) { .service { grid-template-columns: 1fr; padding: 36px 28px; } }
.service h2 { color: var(--papier-hell); }
.service p { color: rgba(246,243,236,0.72); margin-top: 14px; font-size: 1.05rem; }
.service .btn-voll { justify-self: start; }
@media (min-width: 821px) { .service .btn-voll { justify-self: end; } }

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */
.faq details { border: var(--rand); border-bottom: none; background: var(--papier-hell); }
.faq details:last-child { border-bottom: var(--rand); }
.faq summary {
  cursor: pointer; padding: 20px 26px; font-weight: 500; font-size: 1.02rem;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); font-size: 1.3rem; color: var(--blau); }
.faq details[open] summary::after { content: "–"; }
.faq details[open] summary { border-bottom: 1px dashed var(--linie); }
.faq .antwort { padding: 18px 26px 24px; color: var(--tinte-60); font-size: 0.97rem; max-width: 60em; }

/* --------------------------------------------------------------------------
   Fusszeile
   -------------------------------------------------------------------------- */
.fuss {
  border-top: var(--rand); background: var(--papier-hell);
  padding: 40px 0 32px; font-size: 0.9rem;
}
.fuss-grid { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: baseline; }
.fuss a { color: var(--tinte-60); text-decoration: none; margin-right: 22px; }
.fuss a:hover { color: var(--blau); }
.fuss .herkunft { font-family: var(--mono); font-size: 0.78rem; color: var(--tinte-35); }

/* --------------------------------------------------------------------------
   Unterseiten (Recht, Danke, Konto)
   -------------------------------------------------------------------------- */
.unterseite { padding: 64px 0 96px; max-width: 780px; margin: 0 auto; }
.unterseite h1 { font-family: var(--serif); font-weight: 600; font-size: 2.4rem; margin-bottom: 10px; letter-spacing: -0.02em; }
.unterseite h2 { font-size: 1.35rem; margin: 36px 0 10px; }
.unterseite p, .unterseite li { color: var(--tinte-60); margin-bottom: 10px; }
.unterseite .platzhalter { background: rgba(192,58,43,0.08); border: 1px dashed var(--rot); padding: 2px 8px; font-family: var(--mono); font-size: 0.85em; color: var(--rot); }

.formfeld { display: flex; flex-direction: column; gap: 8px; margin: 22px 0; }
.formfeld label { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--tinte-60); }
.formfeld input {
  font-family: var(--mono); font-size: 0.95rem; padding: 13px 14px;
  border: var(--rand); background: var(--papier-hell); color: var(--tinte);
}
.formfeld input:focus { outline: 2px solid var(--blau); outline-offset: 1px; }

.usage-balken { border: var(--rand); background: var(--papier); height: 30px; position: relative; margin: 10px 0 4px; }
.usage-balken .fuellung { position: absolute; inset: 0; width: 0%; background: var(--blau); transition: width 0.8s cubic-bezier(0.22,1,0.36,1); }
.usage-meta { font-family: var(--mono); font-size: 0.82rem; color: var(--tinte-60); display: flex; justify-content: space-between; }

.fehler-box { border-left: 4px solid var(--rot); background: rgba(192,58,43,0.06); color: var(--rot); padding: 12px 16px; margin-top: 16px; font-size: 0.94rem; display: none; }

/* --------------------------------------------------------------------------
   Scroll-Reveal
   -------------------------------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.sichtbar { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .stempel { animation: none; }
  html { scroll-behavior: auto; }
}