/*
 * EasyGAEB Landing Page — single stylesheet, no build step.
 *
 * Brand tokens mirror frontend/src/index.css (Shadcn oklch palette) so the
 * landing page and the React app share the same look-and-feel:
 *   --color-primary           oklch(0.205 0 0)   ~near black
 *   --color-foreground        oklch(0.145 0 0)   ~almost black text
 *   --color-background        oklch(1 0 0)       white
 *   --color-muted-foreground  oklch(0.556 0 0)   muted grey
 *   --color-border            oklch(0.922 0 0)   light grey hairline
 * The accent below (warm orange) is intentionally introduced ONLY for the
 * landing page CTA — the app itself is monochrome by design, but a marketing
 * page needs a click-magnet that stands out.
 */

:root {
  --color-bg: oklch(1 0 0);
  --color-bg-alt: oklch(0.985 0 0);
  --color-fg: oklch(0.145 0 0);
  --color-muted: oklch(0.556 0 0);
  --color-border: oklch(0.922 0 0);
  --color-primary: oklch(0.205 0 0);
  --color-primary-fg: oklch(0.985 0 0);
  --color-accent: #10B981;
  --color-accent-fg: #ffffff;
  --color-accent-hover: #059669;

  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.06);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;

  --container-max: 1200px;
  --container-padding: clamp(1rem, 4vw, 2rem);
  --section-spacing: clamp(3rem, 8vw, 6rem);
}

/* ---- Reset (gezielt, nicht aggressiv) ---- */

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-fg);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  hyphens: auto;
}

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

h1,
h2,
h3,
p,
ul,
ol,
dl,
dd,
figure {
  margin: 0;
}

ul,
ol {
  padding: 0;
}

a {
  color: var(--color-fg);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---- Typografie ---- */

h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 800;
}

h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.125rem;
  line-height: 1.35;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

p {
  max-width: 65ch;
}

strong {
  font-weight: 700;
}

/* ---- Layout ---- */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.section {
  padding-block: var(--section-spacing);
}

.section-alt {
  background-color: var(--color-bg-alt);
  border-block: 1px solid var(--color-border);
}

/* ---- Header ---- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: 1.125rem;
}

.logo:hover {
  text-decoration: none;
}

.logo-glyph {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  color: var(--color-primary-fg);
  font-size: 0.875rem;
  font-weight: 800;
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.05s ease;
  min-height: 44px; /* Touch-Target WCAG */
}

.btn:hover {
  text-decoration: none;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-accent-fg);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-accent-hover);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  min-height: 40px;
}

.btn-lg {
  padding: 1rem 1.75rem;
  font-size: 1.0625rem;
}

/* ---- Hero ---- */

.hero {
  padding-block: clamp(2.5rem, 7vw, 5rem);
  background: linear-gradient(
    180deg,
    var(--color-bg) 0%,
    var(--color-bg-alt) 100%
  );
}

.hero-grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  grid-template-columns: 1fr;
  align-items: center;
}

.hero-content {
  max-width: 36rem;
}

.hero-tagline {
  display: inline-block;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.hero-subline {
  margin-top: 1.5rem;
  font-size: 1.125rem;
  color: var(--color-muted);
  max-width: 36rem;
}

.hero-entity {
  margin-top: 1rem;
  font-size: 0.9375rem;
  color: var(--color-muted);
  font-style: italic;
  max-width: 36rem;
}

.hero-cta {
  margin-top: 2rem;
}

.hero-trust {
  margin-top: 0.875rem;
  font-size: 0.875rem;
  color: var(--color-muted);
}

.hero-image picture,
.hero-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  aspect-ratio: 1280 / 577;
  object-fit: cover;
  background-color: var(--color-bg-alt);
}

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }
}

/* ---- Problem ---- */

.problem-list {
  list-style: none;
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

.problem-list li {
  position: relative;
  padding: 1.25rem 1.25rem 1.25rem 3rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  max-width: none;
}

.problem-list li::before {
  content: "—";
  position: absolute;
  left: 1.25rem;
  top: 1.25rem;
  font-weight: 800;
  color: var(--color-accent);
}

@media (min-width: 768px) {
  .problem-list {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---- How it works (Steps) ---- */

.steps {
  list-style: none;
  display: grid;
  gap: 1.5rem;
  counter-reset: step;
}

.step {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-primary-fg);
  font-weight: 800;
  font-size: 1.125rem;
  margin-bottom: 1rem;
}

.step h3 {
  margin-bottom: 0.5rem;
}

.step p {
  color: var(--color-muted);
  max-width: none;
}

@media (min-width: 768px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---- Features ---- */

.feature-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

.feature {
  padding: 1.5rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.feature h3 {
  margin-bottom: 0.5rem;
}

.feature p {
  color: var(--color-muted);
  max-width: none;
}

@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---- Glossary ---- */

.glossary-list {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

.glossary-entry {
  padding: 1.25rem 1.5rem;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.glossary-entry dt {
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-fg);
  margin-bottom: 0.375rem;
}

.glossary-entry dd {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.55;
}

@media (min-width: 768px) {
  .glossary-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---- FAQ ---- */

.faq-list {
  display: grid;
  gap: 0.75rem;
  max-width: 56rem;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  overflow: hidden;
}

.faq-question {
  list-style: none;
  cursor: pointer;
  padding: 1.125rem 1.25rem;
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: background-color 0.15s ease;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "";
  flex-shrink: 0;
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--color-muted);
  border-bottom: 2px solid var(--color-muted);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

.faq-item[open] .faq-question::after {
  transform: rotate(-135deg);
}

.faq-question:hover {
  background-color: var(--color-bg-alt);
}

.faq-answer {
  padding: 0 1.25rem 1.25rem 1.25rem;
  color: var(--color-muted);
}

.faq-answer p {
  max-width: none;
}

/* ---- Final CTA ---- */

.cta-final {
  background-color: var(--color-primary);
  color: var(--color-primary-fg);
  text-align: center;
}

.cta-final h2 {
  color: var(--color-primary-fg);
  margin-bottom: 1.5rem;
}

.cta-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.cta-sub {
  font-size: 0.9375rem;
  color: oklch(0.78 0 0);
  margin-top: 0.875rem;
}

/* ---- Footer ---- */

.site-footer {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding-block: 2.5rem;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
}

.footer-claim {
  font-weight: 600;
  font-size: 0.9375rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
}

.footer-nav a {
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.footer-copy {
  color: var(--color-muted);
  font-size: 0.8125rem;
}

@media (min-width: 768px) {
  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ---- Legal pages (Impressum / Datenschutz) ---- */

.legal {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.legal h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 1.5rem;
}

.legal h2 {
  font-size: 1.25rem;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.legal p,
.legal dd,
.legal li {
  color: var(--color-fg);
  max-width: 65ch;
}

.legal dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.5rem 1.5rem;
  max-width: 60ch;
}

.legal dt {
  font-weight: 600;
  color: var(--color-muted);
}

.legal .placeholder {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  background-color: oklch(0.95 0.06 90);
  color: oklch(0.4 0.1 60);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.875rem;
}

.legal .back-link {
  display: inline-block;
  margin-top: 3rem;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

/* ---- Accessibility helpers ---- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}