/* =====================================================
   GrundsteuerPrüfer – Landing Page Styles
   WAMOCON GmbH – Production Ready
   ===================================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
  --color-primary: #1E3A5F;
  --color-primary-dark: #152C49;
  --color-accent: #F5A623;
  --color-accent-dark: #D4891A;
  --color-success: #28A745;
  --color-text: #1A1A2E;
  --color-text-muted: #5A6478;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F7F9FC;
  --color-bg-dark: #1E3A5F;
  --color-border: #DDE3ED;
  --color-white: #FFFFFF;
  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 4px rgba(30,58,95,0.08);
  --shadow-md: 0 4px 20px rgba(30,58,95,0.12);
  --shadow-lg: 0 12px 40px rgba(30,58,95,0.18);
  --transition: 0.22s ease;
  --max-width: 1140px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ---------- Layout Helpers ---------- */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 24px;
}

.section { padding-block: 80px; }
.section--alt { background: var(--color-bg-alt); }

/* ---------- Typography ---------- */
.headline-xl {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.headline-lg {
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.headline-md {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 700;
  line-height: 1.3;
}

.subline {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.subline--light { color: rgba(255,255,255,0.8); }

.text-accent { color: var(--color-accent); }
.text-center { text-align: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.5);
}

.btn--outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--color-white);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn--ghost:hover {
  background: var(--color-bg-alt);
  border-color: var(--color-primary);
}

.btn--lg { padding: 18px 36px; font-size: 1.1rem; }
.btn--sm { padding: 10px 20px; font-size: 0.9rem; }

/* ---------- Navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.nav.scrolled { box-shadow: var(--shadow-md); }

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.nav__logo img,
.nav__logo svg { width: 36px; height: 36px; border-radius: 8px; }

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.nav__links a:hover { color: var(--color-primary); }

.nav__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Language Toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 3px;
  gap: 2px;
}

.lang-toggle__btn {
  padding: 5px 12px;
  border-radius: 16px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.lang-toggle__btn.active {
  background: var(--color-primary);
  color: var(--color-white);
}

/* Mobile Menu Button */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  border: none;
  background: transparent;
}

.nav__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ---------- Hero Section ---------- */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2D5080 60%, #1A3A6B 100%);
  padding-block: 100px 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245,166,35,0.15);
  border: 1px solid rgba(245,166,35,0.4);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 24px;
}

.hero__title {
  color: var(--color-white);
  margin-bottom: 20px;
}

.hero__sub {
  margin-bottom: 40px;
}

.hero__cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__mockup {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 100%;
  max-width: 420px;
  backdrop-filter: blur(8px);
  position: relative;
}

.hero__mockup-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
}

.hero__mockup-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.hero__mockup-dot:nth-child(1) { background: #FF5F57; }
.hero__mockup-dot:nth-child(2) { background: #FEBC2E; }
.hero__mockup-dot:nth-child(3) { background: #28C840; }

.mockup-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.mockup-row--ok {
  background: rgba(40,167,69,0.15);
  color: #7EE8A2;
}

.mockup-row--warn {
  background: rgba(245,166,35,0.15);
  color: var(--color-accent);
}

.mockup-row--error {
  background: rgba(220,53,69,0.15);
  color: #FF8F9C;
}

.mockup-row__icon { font-size: 1.1rem; }

.mockup-score {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  margin-top: 16px;
  color: var(--color-white);
  font-weight: 600;
}

.mockup-score__value {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-accent);
}

/* ---------- Stats Bar ---------- */
.stats-bar {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding-block: 28px;
}

.stats-bar__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item__value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  line-height: 1;
}

.stat-item__label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ---------- Features Section ---------- */
.features__intro {
  max-width: 680px;
  margin-inline: auto;
  text-align: center;
  margin-bottom: 60px;
}

.features__intro .headline-lg { margin-bottom: 16px; }

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: all var(--transition);
}

.feature-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.feature-card__icon {
  width: 52px;
  height: 52px;
  background: rgba(30,58,95,0.08);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.feature-card__text {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ---------- How It Works ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 56px;
  position: relative;
}

.steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: calc(12.5% + 14px);
  right: calc(12.5% + 14px);
  height: 2px;
  background: linear-gradient(to right, var(--color-primary), var(--color-accent));
  z-index: 0;
}

.step {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step__number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 1.25rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-inline: auto;
  margin-bottom: 20px;
  position: relative;
}

.step:last-child .step__number { background: var(--color-accent); color: var(--color-primary); }

.step__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.step__text {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ---------- Trust Section ---------- */
.trust__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.trust__badges {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.trust-badge__icon { font-size: 1.5rem; flex-shrink: 0; }

.trust-badge__text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
}

.trust__seal {
  display: flex;
  justify-content: center;
  align-items: center;
}

.trust__seal svg { width: 180px; height: 180px; opacity: 0.9; }

/* ---------- CTA Banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2D5080 100%);
  padding-block: 72px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner__title {
  color: var(--color-white);
  margin-bottom: 16px;
}

.cta-banner__sub {
  margin-bottom: 40px;
  max-width: 560px;
  margin-inline: auto;
  margin-bottom: 40px;
}

.cta-banner__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- FAQ ---------- */
.faq__list {
  max-width: 720px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.faq-item__question {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--color-white);
  transition: background var(--transition);
  user-select: none;
}

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

.faq-item__chevron {
  font-size: 1.1rem;
  transition: transform var(--transition);
  flex-shrink: 0;
}

.faq-item.open .faq-item__chevron { transform: rotate(180deg); }

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.25s ease;
  padding: 0 24px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  background: var(--color-bg-alt);
}

.faq-item.open .faq-item__answer {
  max-height: 300px;
  padding: 16px 24px 20px;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.65);
  padding-block: 48px 32px;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 28px;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer__brand img,
.footer__brand svg {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.footer__brand-name {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--color-white);
}

.footer__tagline {
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer__heading {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__links a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  transition: color var(--transition);
}

.footer__links a:hover { color: var(--color-white); }

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer__copy { font-size: 0.82rem; }

.footer__legal {
  display: flex;
  gap: 20px;
}

.footer__legal a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition);
}

.footer__legal a:hover { color: var(--color-white); }

/* ---------- Legal Pages ---------- */
.legal-header {
  background: var(--color-primary);
  padding-block: 60px 48px;
}

.legal-header h1 { color: var(--color-white); margin-bottom: 8px; }
.legal-header p { color: rgba(255,255,255,0.7); font-size: 0.9rem; }

.legal-content {
  max-width: 800px;
  margin-inline: auto;
  padding-block: 60px;
  padding-inline: 24px;
}

.legal-content h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 40px;
  margin-bottom: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.legal-content h2:first-child { border-top: none; margin-top: 0; padding-top: 0; }
.legal-content p { margin-bottom: 14px; font-size: 0.95rem; line-height: 1.75; color: var(--color-text-muted); }
.legal-content ul { margin: 12px 0 16px 24px; }
.legal-content ul li { font-size: 0.95rem; color: var(--color-text-muted); line-height: 1.7; margin-bottom: 6px; list-style: disc; }
.legal-content table { width: 100%; border-collapse: collapse; margin-bottom: 24px; font-size: 0.9rem; }
.legal-content th { background: var(--color-primary); color: var(--color-white); padding: 10px 14px; text-align: left; }
.legal-content td { padding: 10px 14px; border-bottom: 1px solid var(--color-border); color: var(--color-text-muted); }
.legal-content tr:nth-child(even) td { background: var(--color-bg-alt); }

/* ---------- Scroll to top ---------- */
.scroll-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(16px);
  transition: all var(--transition);
  z-index: 50;
  font-size: 1rem;
}

.scroll-top.visible { opacity: 1; transform: translateY(0); }
.scroll-top:hover { background: var(--color-accent); color: var(--color-primary); }

/* ---------- Utility ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .features__grid { grid-template-columns: repeat(2, 1fr); }
  .stats-bar__grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .hero__inner { gap: 40px; }
  .footer__top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding-block: 56px; }
  .hero { padding-block: 72px 56px; }

  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__badge { justify-content: center; }
  .hero__cta { justify-content: center; }
  .hero__visual { display: none; }

  .features__grid { grid-template-columns: 1fr; }

  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps::before { display: none; }

  .trust__grid { grid-template-columns: 1fr; }
  .trust__seal { display: none; }

  .nav__links { display: none; }

  .nav__hamburger {
    display: flex;
  }

  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 24px 24px;
    gap: 16px;
    z-index: 99;
    box-shadow: var(--shadow-md);
  }

  .nav { position: relative; }

  .footer__top { grid-template-columns: 1fr; gap: 32px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; gap: 12px; }

  .stats-bar__grid { grid-template-columns: repeat(2, 1fr); }

  .cta-banner__actions { flex-direction: column; align-items: center; }
}

@media (max-width: 480px) {
  .steps { grid-template-columns: 1fr; }
  .trust__badges { grid-template-columns: 1fr; }
  .btn--lg { padding: 16px 28px; font-size: 1rem; }
}