/* VisuStruct — Webseite. Hell, ruhig, ein Akzent aus dem App-Icon (#2e8cee → #5cc4fb). */
:root {
  --bg: #ffffff;
  --bg-soft: #f4f7fb;
  --ink: #0d1726;
  --ink-2: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --brand: #1f7ae0;
  --brand-strong: #145fb8;
  --brand-light: #5cc4fb;
  --brand-tint: #eaf3fe;
  --ok: #16a34a;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 2px 6px rgba(15, 23, 42, 0.05), 0 24px 60px -12px rgba(15, 40, 80, 0.22);
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--brand);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin: 0;
}

:focus-visible {
  outline: 3px solid rgba(31, 122, 224, 0.45);
  outline-offset: 2px;
  border-radius: 6px;
}

.wrap {
  width: min(1160px, 100% - 2rem);
  margin-inline: auto;
}

[id] {
  scroll-margin-top: 5rem;
}

/* Kopfzeile */
.hd {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--line);
}
@supports (backdrop-filter: blur(8px)) {
  .hd {
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: saturate(1.6) blur(14px);
  }
}
.hd-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  font-weight: 750;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}
.brand:hover {
  text-decoration: none;
}
.brand img {
  width: 36px;
  height: 36px;
  border-radius: 22%;
}
.hd-nav {
  display: none;
  gap: 1.5rem;
  margin-inline-start: 1rem;
}
.hd-nav a {
  color: var(--ink-2);
  font-size: 0.93rem;
  font-weight: 550;
}
.hd-nav a:hover {
  color: var(--brand);
  text-decoration: none;
}
.hd-end {
  margin-inline-start: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.langs {
  display: flex;
  gap: 2px;
  padding: 3px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
}
.langs a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.1rem;
  height: 1.9rem;
  padding: 0 0.45rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.02em;
}
.langs a:hover {
  color: var(--ink);
  text-decoration: none;
}
.langs a[aria-current="page"] {
  background: var(--bg);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
}
.hd-end .hd-cta {
  display: none;
}

/* Knöpfe */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.6rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 650;
  font-size: 0.97rem;
  line-height: 1.2;
  text-align: center;
  transition: background-color 0.15s, box-shadow 0.15s, transform 0.15s, color 0.15s;
}
.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}
.btn-primary {
  color: #fff;
  background: var(--brand);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.1), 0 6px 18px -6px rgba(31, 122, 224, 0.6);
}
.btn-primary:hover {
  background: var(--brand-strong);
}
.btn-ghost {
  color: var(--ink);
  background: var(--bg);
  border-color: var(--line);
  box-shadow: var(--shadow-sm);
}
.btn-ghost:hover {
  border-color: #cbd5e1;
}
.btn-light {
  color: var(--brand-strong);
  background: #fff;
}
.btn-sm {
  min-height: 36px;
  padding: 0.4rem 0.95rem;
  font-size: 0.88rem;
}
.btn-lg {
  min-height: 52px;
  padding: 0.8rem 1.5rem;
  font-size: 1.02rem;
}
.btn-icon {
  width: 1.1em;
  height: 1.1em;
  flex: none;
}
[dir="rtl"] .btn-icon {
  transform: scaleX(-1);
}

/* Startbereich */
.hero {
  position: relative;
  overflow: hidden;
  padding: 3.5rem 0 0;
  background:
    radial-gradient(60% 50% at 50% 0%, rgba(92, 196, 251, 0.22), transparent 70%),
    radial-gradient(40% 40% at 90% 30%, rgba(31, 122, 224, 0.1), transparent 70%),
    var(--bg);
}
.hero::before {
  /* feines Raster wie Struktogramm-Kästchen */
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(15, 23, 42, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15, 23, 42, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(70% 60% at 50% 20%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(70% 60% at 50% 20%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero-text {
  position: relative;
  text-align: center;
  max-width: 820px;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-2);
}
.pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 4px rgba(22, 163, 74, 0.15);
}
.hero h1 {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
}
.grad {
  display: block;
  background: linear-gradient(92deg, var(--brand) 10%, var(--brand-light) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-bottom: 0.08em;
}
.lead {
  margin: 1.25rem auto 0;
  max-width: 640px;
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  color: var(--ink-2);
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}
.hero .actions {
  justify-content: center;
}
.note {
  margin: 1rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
}
.hero-shot {
  position: relative;
  margin-top: 3rem;
  max-width: 1040px;
}
.window {
  display: block;
  border-radius: 14px 14px 0 0;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-bottom: 0;
  box-shadow: var(--shadow-lg);
}
.window-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 38px;
  padding: 0 14px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
}
.window-bar i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #d5dde7;
}
.window-bar i:nth-child(1) {
  background: #ff6159;
}
.window-bar i:nth-child(2) {
  background: #ffbd2e;
}
.window-bar i:nth-child(3) {
  background: #28c941;
}
.window-url {
  margin-inline: auto;
  padding: 0.15rem 1.2rem;
  border-radius: 7px;
  background: #fff;
  border: 1px solid var(--line);
  font-size: 0.75rem;
  color: var(--muted);
  transform: translateX(-24px);
}

/* Abschnitte */
.sec {
  padding: 5rem 0;
}
.sec-soft {
  background: var(--bg-soft);
  border-block: 1px solid var(--line);
}
.sec-head {
  max-width: 680px;
  margin: 0 auto 3rem;
  text-align: center;
}
.sec-head h2,
.split-text h2 {
  font-size: clamp(1.75rem, 3.6vw, 2.5rem);
  font-weight: 780;
}
.sec-head p:not(.kicker) {
  margin: 1rem 0 0;
  font-size: 1.08rem;
  color: var(--muted);
}
.kicker {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand);
}

/* Drei Schritte */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 1.6rem;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--line);
}
.step-img {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: 1.1rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
}
.step-num {
  display: inline-grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  margin-bottom: 1rem;
  border-radius: 12px;
  background: var(--brand-tint);
  color: var(--brand);
  font-weight: 800;
  font-size: 1.05rem;
}
.step h3,
.feature h3 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.015em;
}
.step p,
.feature p {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.97rem;
}

/* Funktionen */
.features {
  display: grid;
  gap: 1.25rem;
}
.feature {
  padding: 1.6rem;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.feature-icon {
  display: inline-grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  margin-bottom: 1rem;
  border-radius: 12px;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-light));
  box-shadow: 0 6px 16px -6px rgba(31, 122, 224, 0.6);
}
.icon {
  width: 1.4rem;
  height: 1.4rem;
}

/* Lernbereich */
.visubot-wordmark {
  display: block;
  width: min(360px, 85%);
  height: auto;
  margin: 0 0 1rem;
}
.split {
  display: grid;
  gap: 3rem;
  align-items: center;
}
.split-text > p:not(.kicker):not(.note) {
  margin: 1rem 0 0;
  font-size: 1.08rem;
}
.checks {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}
.checks li {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  color: var(--ink);
  font-weight: 520;
}
.check {
  flex: none;
  width: 1.4rem;
  height: 1.4rem;
  padding: 3px;
  margin-top: 0.1rem;
  border-radius: 50%;
  color: var(--ok);
  background: rgba(22, 163, 74, 0.12);
  stroke-width: 2.6;
}
.shot {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  background: #fff;
}

/* Weitere Versionen */
.alts {
  display: grid;
  gap: 1.5rem;
}
.alt {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.alt-img {
  aspect-ratio: 16 / 10;
  padding: 1.5rem 1.5rem 0;
  background: linear-gradient(160deg, var(--brand-tint), #f8fbff);
  overflow: hidden;
}
.alt-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
  border-radius: 10px 10px 0 0;
  box-shadow: 0 10px 30px -10px rgba(15, 40, 80, 0.35);
}
.alt-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1.6rem;
  flex: 1;
}
.alt-body h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.2rem;
}
.alt-icon {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--brand);
  flex: none;
}
.alt-body p {
  margin: 0;
  color: var(--muted);
  font-size: 0.97rem;
}
.alt-body > :last-child {
  margin-top: auto;
}
.badge {
  display: inline-block;
  border-radius: 9px;
}
.badge img {
  height: 45px;
  width: auto;
}

/* Abschlussband */
.band {
  padding: 3.5rem 1.5rem;
  border-radius: 28px;
  text-align: center;
  color: #e8f3ff;
  background:
    radial-gradient(60% 80% at 100% 0%, rgba(92, 196, 251, 0.55), transparent 60%),
    linear-gradient(135deg, #1f7ae0, #1565c8);
  box-shadow: 0 30px 60px -25px rgba(21, 101, 200, 0.6);
}
.band h2 {
  color: #fff;
  font-size: clamp(1.7rem, 3.6vw, 2.4rem);
  font-weight: 780;
}
.band p {
  max-width: 620px;
  margin: 1rem auto 2rem;
  font-size: 1.08rem;
}

/* Fußzeile */
.ft {
  padding: 4rem 0 2rem;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  color: var(--muted);
}
.ft-grid {
  display: grid;
  gap: 2.5rem;
}
.ft-brand p {
  margin: 0.75rem 0 0;
  max-width: 280px;
}
.ft-col h2 {
  margin-bottom: 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
}
.ft-col p {
  margin: 0 0 0.6rem;
}
.ft-col strong {
  color: var(--ink-2);
}
.ft-col address {
  font-style: normal;
}
.ft-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}
.ft-col ul a {
  color: var(--ink-2);
}
.ft-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}
.ft-bottom p {
  margin: 0;
}

/* Angeberwissen */
.goat-intro {
  display: grid;
  gap: 2rem;
  align-items: center;
}
.goat-full {
  width: min(260px, 70%);
  margin: 0 auto;
}
.goat-intro h1 {
  font-size: clamp(2rem, 4.6vw, 3.2rem);
}
.bubble {
  position: relative;
  padding: 1.1rem 1.3rem;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.bubble h3 {
  font-size: 1.1rem;
  font-weight: 700;
}
.bubble p {
  margin: 0.5rem 0 0;
}
.bubble-lead {
  margin-top: 1.5rem;
  font-size: 1.08rem;
  background: var(--brand-tint);
  border-color: transparent;
}
.facts {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 820px;
  display: grid;
  gap: 1.25rem;
}
.fact {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 0.9rem;
  align-items: start;
}
.fact-goat {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--bg);
  box-shadow: var(--shadow-sm);
}
.fact .bubble::before {
  content: "";
  position: absolute;
  top: 20px;
  left: -8px;
  width: 14px;
  height: 14px;
  background: var(--bg);
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transform: rotate(45deg);
}
.src {
  font-size: 0.85rem;
  color: var(--muted);
}
.people {
  display: grid;
  gap: 1.5rem;
  max-width: 920px;
  margin: 0 auto;
}
.person {
  display: grid;
  gap: 1.25rem;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.person figure {
  margin: 0;
}
.person figure img {
  width: 100%;
  max-width: 260px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
}
.person figcaption {
  margin-top: 0.5rem;
  max-width: 260px;
  font-size: 0.78rem;
  color: var(--muted);
}
.person h3 {
  font-size: 1.3rem;
  font-weight: 750;
}
.person-meta {
  margin: 0.25rem 0 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
}
.person ul {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 0.4rem;
}
.hd-nav a[aria-current="page"] {
  color: var(--brand);
}

/* Umschalter VisuStruct | VisuBot in der Kopfzeile */
.worlds {
  display: none;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-soft);
  font-size: 0.85rem;
  font-weight: 650;
}
.worlds a {
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  color: var(--muted);
}
.worlds a:hover {
  color: var(--ink);
  text-decoration: none;
}
.worlds a[aria-current="page"] {
  color: #fff;
  background: var(--brand);
}

/* VisuBot-Startseite: Farben aus dem VisuBot-Logo (Navy, Orange, Lila), Aufbau wie VisuStruct */
.visubot {
  --bg-soft: #f4f3fa;
  --ink: #232846;
  --ink-2: #3a3f5e;
  --muted: #6a6890;
  --line: #e3e0f0;
  --brand: #d96a00;
  --brand-strong: #b35700;
  --brand-light: #fda115;
  --brand-tint: #fff1df;
}
.visubot :focus-visible {
  outline-color: rgba(217, 106, 0, 0.45);
}
.visubot .btn-primary {
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.1), 0 6px 18px -6px rgba(217, 106, 0, 0.6);
}
.visubot .btn-ghost:hover {
  border-color: #cfcae6;
}
.visubot .hero {
  background:
    radial-gradient(60% 50% at 50% 0%, rgba(253, 161, 21, 0.2), transparent 70%),
    radial-gradient(40% 40% at 90% 30%, rgba(139, 124, 214, 0.16), transparent 70%),
    var(--bg);
}
.visubot .feature-icon {
  box-shadow: 0 6px 16px -6px rgba(217, 106, 0, 0.6);
}
.visubot .band {
  color: #e9e7f7;
  background:
    radial-gradient(60% 80% at 100% 0%, rgba(253, 161, 21, 0.45), transparent 60%),
    linear-gradient(135deg, #2f3454, #4a4f80);
  box-shadow: 0 30px 60px -25px rgba(47, 52, 84, 0.6);
}
.visubot .btn-light {
  color: var(--ink);
}
.brand-bot {
  color: var(--brand);
}
.visubot .brand img {
  width: 55px;
  height: 32px;
  border-radius: 0;
}
.hero-wordmark {
  width: min(320px, 80%);
  margin: 0 auto 1.25rem;
}
.world-mark {
  display: block;
  width: 64px;
  height: 64px;
  margin: 0 0 1rem;
  border-radius: 22%;
}

/* Größere Bildschirme */
@media (min-width: 640px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
  .features {
    grid-template-columns: repeat(2, 1fr);
  }
  .alts {
    grid-template-columns: repeat(2, 1fr);
  }
  .person {
    grid-template-columns: 220px 1fr;
    gap: 2rem;
    padding: 2rem;
  }
  .hd-end .hd-cta {
    display: inline-flex;
  }
}

@media (min-width: 900px) {
  .hero {
    padding-top: 5rem;
  }
  .hd-nav {
    display: flex;
  }
  .features {
    grid-template-columns: repeat(3, 1fr);
  }
  .split {
    grid-template-columns: 5fr 6fr;
    gap: 4rem;
  }
  .goat-intro {
    grid-template-columns: 300px 1fr;
    gap: 3rem;
  }
  .goat-full {
    width: 100%;
  }
  .sec {
    padding: 6.5rem 0;
  }
  .ft-grid {
    grid-template-columns: 1.1fr 1.6fr 0.9fr 0.8fr;
  }
}

@media (min-width: 1100px) {
  .worlds {
    display: inline-flex;
  }
}

@media (max-width: 520px) {
  .hero .btn-lg {
    width: 100%;
  }
  .window-url {
    display: none;
  }
}

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