:root {
  --bg-body: #f8f8f5;
  --bg-hero: #fcfcfa;
  --bg-band: #efefeb;
  --bg-band-alt: #f6f6f2;
  --bg-footer: #e9e9e5;
  --bg-card: #fcfcfa;
  --bg-nav: rgba(252, 252, 250, 0.92);
  --bg-badge: #f4f4f5;
  --text-main: #18181b;
  --text-secondary: #52525b;
  --text-muted: #71717a;
  --border-color: rgba(212, 212, 208, 0.9);
  --border-card: rgba(231, 229, 228, 0.9);
  --primary: #0284c7;
  --primary-hover: #0369a1;
  --primary-light: rgba(2, 132, 199, 0.12);
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --btn-bg: #18181b;
  --btn-text: #ffffff;
  --btn-hover: #27272a;
  --shadow-card: 0 1px 2px rgba(24, 24, 27, 0.04), 0 6px 20px rgba(24, 24, 27, 0.04);
  --navbar-height: 76px;
}

html.dark {
  --bg-body: #030712;
  --bg-hero: #030712;
  --bg-band: #090d16;
  --bg-band-alt: #030712;
  --bg-footer: #060a12;
  --bg-card: #0f172a;
  --bg-nav: rgba(15, 23, 42, 0.85);
  --bg-badge: rgba(59, 130, 246, 0.12);
  --text-main: #f9fafb;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --border-color: #1e293b;
  --border-card: #1e293b;
  --primary: #38bdf8;
  --primary-hover: #0284c7;
  --primary-light: rgba(56, 189, 248, 0.14);
  --btn-bg: #0284c7;
  --btn-text: #ffffff;
  --btn-hover: #0369a1;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
}

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

html {
  scroll-behavior: smooth;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-main);
  background-color: var(--bg-body);
  line-height: 1.6;
}

body {
  min-height: 100vh;
  background-color: var(--bg-body);
  color: var(--text-main);
  transition: background-color 0.25s ease, color 0.25s ease;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
}

.container-custom {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}
@media (min-width: 640px) { .container-custom { padding: 0 2rem; } }
@media (min-width: 1024px) { .container-custom { padding: 0 3rem; } }

.section-anchor {
  scroll-margin-top: calc(var(--navbar-height) + 16px);
}

/* Navbar */
.navbar-wrapper {
  position: fixed;
  top: 1rem;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 0 1rem;
}

.navbar-inner {
  max-width: 1160px;
  margin: 0 auto;
  background: var(--bg-nav);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  padding: 0.65rem 1.35rem;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: all 0.25s ease;
}

.navbar-inner.mobile-open {
  border-radius: 1.25rem;
}

.brand-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  flex-shrink: 0;
}

.brand-sub {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  display: block;
  line-height: 1.1;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 1.35rem;
}
@media (min-width: 1024px) {
  .nav-links { display: flex; }
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.2s ease;
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  color: var(--text-main);
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.25s ease;
}
.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Language Dropdown */
.lang-dropdown {
  position: relative;
}
.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.7rem;
  border-radius: 0.65rem;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
  transition: background 0.2s ease, border-color 0.2s ease;
}
.lang-btn:hover {
  border-color: var(--primary);
}
.lang-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  inset-inline-end: 0;
  width: 185px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.85rem;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.25);
  padding: 0.35rem;
  display: none;
  z-index: 100;
}
.lang-menu.open {
  display: block;
}
.lang-option {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0.75rem;
  border-radius: 0.55rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: start;
  transition: background 0.15s ease, color 0.15s ease;
}
.lang-option:hover, .lang-option.active {
  background: var(--primary-light);
  color: var(--text-main);
}
.lang-check {
  margin-inline-start: auto;
  color: var(--primary);
  font-weight: 700;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 9999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  transition: all 0.2s ease;
}
.icon-btn:hover {
  color: var(--text-main);
  border-color: var(--primary);
}

.mobile-toggle {
  display: inline-flex;
}
@media (min-width: 1024px) {
  .mobile-toggle { display: none; }
}

.nav-cta {
  display: none;
  padding: 0.48rem 1rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--btn-bg);
  color: var(--btn-text);
  transition: background 0.2s ease;
  white-space: nowrap;
}
.nav-cta:hover {
  background: var(--btn-hover);
}
@media (min-width: 1024px) {
  .nav-cta { display: inline-flex; }
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  max-width: 1160px;
  margin: 0.5rem auto 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 0.85rem;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.22);
}
.mobile-menu.open {
  display: block;
}
.mobile-menu a, .mobile-menu button.mobile-nav-item {
  display: block;
  width: 100%;
  text-align: start;
  padding: 0.65rem 0.85rem;
  border-radius: 0.6rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
}
.mobile-menu a:hover, .mobile-menu button.mobile-nav-item:hover {
  background: var(--primary-light);
  color: var(--text-main);
}

/* Buttons & Cards */
.rp-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.78rem 1.6rem;
  border-radius: 0.6rem;
  font-weight: 600;
  font-size: 0.95rem;
  background: var(--btn-bg);
  color: var(--btn-text);
  transition: all 0.2s ease;
}
.rp-btn-primary:hover {
  background: var(--btn-hover);
  transform: translateY(-1px);
}

.rp-btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.78rem 1.6rem;
  border-radius: 0.6rem;
  font-weight: 600;
  font-size: 0.95rem;
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
}
.rp-btn-secondary:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.rp-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 0.9rem;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

/* Hero Section */
.hero-section {
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding: 7.5rem 0 4.5rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-hero);
  background-image:
    radial-gradient(circle at 18% 22%, rgba(2, 132, 199, 0.10), transparent 38%),
    radial-gradient(circle at 82% 75%, rgba(16, 185, 129, 0.08), transparent 40%),
    linear-gradient(90deg, rgba(148, 163, 184, 0.04) 1px, transparent 1px),
    linear-gradient(rgba(148, 163, 184, 0.04) 1px, transparent 1px);
  background-size: auto, auto, 52px 52px, 52px 52px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}
@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.08fr 0.92fr;
    gap: 3.5rem;
  }
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(56, 189, 248, 0.28);
  margin-bottom: 1.25rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 9999px;
  background: var(--accent-green);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
}

.hero-title {
  font-size: clamp(2.15rem, 4.5vw, 3.35rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.025em;
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 38rem;
  margin-bottom: 1.6rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin-bottom: 2rem;
}

.tag-item {
  padding: 0.3rem 0.75rem;
  border-radius: 0.45rem;
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* Code / Mail Server Terminal Preview */
.terminal-card {
  background: #0b1220;
  border: 1px solid #1e293b;
  border-radius: 0.9rem;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  color: #e2e8f0;
  direction: ltr;
  text-align: left;
}
.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.65rem 0.9rem;
  background: #070d17;
  border-bottom: 1px solid #1e293b;
  flex-wrap: wrap;
}
.terminal-tabs {
  display: flex;
  gap: 0.25rem;
  background: #0f172a;
  padding: 0.2rem;
  border-radius: 0.45rem;
}
.terminal-tab {
  padding: 0.3rem 0.65rem;
  border-radius: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: #64748b;
  transition: all 0.15s ease;
}
.terminal-tab.active {
  background: #1e293b;
  color: #f8fafc;
}
.terminal-tab:hover:not(.active) {
  color: #cbd5e1;
}
.terminal-filename {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.72rem;
  color: #64748b;
}
.terminal-body {
  padding: 1.1rem 1.25rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.78rem;
  line-height: 1.65;
  overflow-x: auto;
  min-height: 290px;
  display: flex;
}
.terminal-lines {
  user-select: none;
  text-align: right;
  padding-right: 0.85rem;
  margin-right: 0.85rem;
  border-right: 1px solid #1e293b;
  color: #475569;
  flex-shrink: 0;
}
.terminal-code {
  white-space: pre;
  color: #cbd5e1;
  flex: 1;
}

/* Sections */
.section-band {
  padding: 5rem 0;
  background: var(--bg-band);
  border-bottom: 1px solid var(--border-color);
}
.section-band-alt {
  padding: 5rem 0;
  background: var(--bg-band-alt);
  border-bottom: 1px solid var(--border-color);
}
.section-header {
  text-align: center;
  max-width: 46rem;
  margin: 0 auto 3.25rem;
}
.section-title {
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}
.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* About Grid */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}
@media (min-width: 1024px) {
  .about-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 3.5rem;
  }
}
.values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}
@media (min-width: 640px) {
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
.value-card {
  padding: 1.1rem;
}
.value-card h3 {
  font-size: 0.98rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}
.value-card p {
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.stack-window {
  overflow: hidden;
  direction: ltr;
  text-align: left;
}
.stack-window-bar {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(148, 163, 184, 0.06);
}
.stack-dot {
  width: 9px;
  height: 9px;
  border-radius: 9999px;
  background: var(--text-muted);
  opacity: 0.45;
}
.stack-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}
.stack-item {
  padding: 0.7rem 0.9rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
  background: rgba(148, 163, 184, 0.04);
}
.stack-item-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}
.stack-item-detail {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.35rem;
}
@media (min-width: 640px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .services-grid { grid-template-columns: repeat(3, 1fr); }
}
.service-card {
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.service-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}
.icon-badge {
  width: 44px;
  height: 44px;
  border-radius: 0.75rem;
  display: grid;
  place-items: center;
  background: var(--bg-badge);
  border: 1px solid var(--border-color);
  color: var(--primary);
  margin-bottom: 1.1rem;
}
.service-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.service-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.2rem;
  flex-grow: 1;
}
.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: auto;
}
.feature-list li {
  font-size: 0.83rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.45rem;
}
.feature-list li::before {
  content: "·";
  font-weight: 700;
  color: var(--primary);
}

/* Mail Server & Abuse Compliance Section (Telekom Postmaster) */
.compliance-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 1024px) {
  .compliance-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.compliance-card {
  padding: 1.6rem;
  border-top: 3px solid var(--primary);
}
.compliance-card.abuse-highlight {
  border-top-color: var(--accent-amber);
}
.compliance-card.dc-highlight {
  border-top-color: var(--accent-green);
}
.compliance-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.65rem;
  border-radius: 0.4rem;
  background: var(--primary-light);
  color: var(--primary);
  margin-bottom: 0.85rem;
}
.kv-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}
.kv-row {
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: 0.6rem;
}
.kv-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.kv-label {
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  display: block;
}
.kv-value {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-main);
  word-break: break-word;
}
.kv-value.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
}
.kv-value a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Impressum & Legal Cards */
.legal-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 768px) {
  .legal-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
.legal-box {
  padding: 1.75rem;
}
.legal-box h3 {
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.legal-box p, .legal-box li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.6rem;
}

/* Contact Grid */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: 960px;
  margin: 0 auto;
}
@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1.6fr 1fr;
  }
}

/* CTA Banner */
.cta-banner {
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: flex-start;
  justify-content: space-between;
}
@media (min-width: 768px) {
  .cta-banner {
    flex-direction: row;
    align-items: center;
  }
}

/* Footer */
.site-footer {
  background: var(--bg-footer);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 1.8fr 1fr 1fr 1fr; }
}
.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.9rem;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer-links a, .footer-links button {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color 0.15s ease;
}
.footer-links a:hover, .footer-links button:hover {
  color: var(--primary);
}
.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.83rem;
  color: var(--text-muted);
}

/* Floating Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 60;
  padding: 1rem;
  display: none;
}
.cookie-banner.visible {
  display: block;
}
.cookie-banner-inner {
  max-width: 960px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.15rem 1.4rem;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
@media (min-width: 768px) {
  .cookie-banner-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}
.cookie-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  flex-shrink: 0;
}

/* Native Modal Dialog (Modern Web Guidance compliant) */
dialog:modal {
  overscroll-behavior: contain;
  margin: auto;
  max-width: 560px;
  width: calc(100% - 2rem);
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 1.75rem;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
}
dialog::backdrop {
  overflow: hidden;
  overscroll-behavior: contain;
  background: rgba(3, 7, 18, 0.72);
  backdrop-filter: blur(4px);
}
.dialog-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border-color);
}