/* Self-hosted fonts */
@font-face {
  font-family: "Source Sans Pro";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/assets/fonts/SourceSansPro-Regular.woff2") format("woff2");
}
@font-face {
  font-family: "Source Sans Pro";
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url("/assets/fonts/SourceSansPro-Italic.woff2") format("woff2");
}
@font-face {
  font-family: "Source Sans Pro";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/assets/fonts/SourceSansPro-SemiBold.woff2") format("woff2");
}
@font-face {
  font-family: "Source Sans Pro";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("/assets/fonts/SourceSansPro-Bold.woff2") format("woff2");
}

/* Design tokens */
:root {
  --c-bg: #ffffff;
  --c-bg-alt: #f8fafc;
  --c-text: #0f172a;
  --c-text-muted: #475569;
  --c-accent: #1e3a5f;
  --c-accent-hover: #2c4f7a;
  --c-border: #e2e8f0;

  --maxw: 1100px;
  --pad-x: clamp(1.25rem, 4vw, 2rem);
  --section-y: clamp(4rem, 8vw, 6.5rem);

  --r-sm: 4px;
  --r-md: 8px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

/* Base */
body {
  font-family: "Source Sans Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

/* Skip link (a11y) */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 0.75rem 1rem;
  background: var(--c-accent);
  color: #fff;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--c-border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding-block: 0.75rem;
  gap: 1rem;
}
.brand {
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: 0.01em;
  color: var(--c-text);
}
.brand:hover { color: var(--c-accent); }

.lang-switch {
  display: flex;
  gap: 0.25rem;
  align-items: center;
  font-size: 0.875rem;
  color: var(--c-text-muted);
}
.lang-switch a {
  padding: 0.25rem 0.5rem;
  border-radius: var(--r-sm);
}
.lang-switch a:hover { color: var(--c-accent); }
.lang-switch [aria-current="true"] {
  color: var(--c-text);
  font-weight: 600;
}
.lang-switch .sep { color: var(--c-border); }

/* Section base */
section { padding-block: var(--section-y); }
section + section { border-top: 1px solid var(--c-border); }

.section-title {
  font-size: clamp(1.5rem, 2.5vw, 1.875rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
  color: var(--c-text);
}
.section-lead {
  font-size: 1.125rem;
  color: var(--c-text-muted);
  max-width: 60ch;
  margin-bottom: 2.5rem;
}

/* Hero */
.hero {
  padding-block: clamp(5rem, 10vw, 8rem);
}
.hero-eyebrow {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-accent);
  margin-bottom: 1rem;
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  max-width: 22ch;
}
.hero-sub {
  font-size: clamp(1.125rem, 1.6vw, 1.25rem);
  color: var(--c-text-muted);
  max-width: 60ch;
  margin-bottom: 2rem;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: var(--c-accent);
  color: #fff;
  border-radius: var(--r-md);
  font-weight: 600;
  transition: background-color 120ms ease;
}
.hero-cta:hover { background: var(--c-accent-hover); }

/* Services grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}
.service-card {
  padding: 1.75rem;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  background: var(--c-bg);
  transition: border-color 150ms ease, transform 150ms ease;
}
.service-card:hover {
  border-color: var(--c-accent);
}
.service-card .icon {
  width: 32px;
  height: 32px;
  color: var(--c-accent);
  margin-bottom: 1rem;
}
.service-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.service-card p {
  color: var(--c-text-muted);
  font-size: 0.9375rem;
  line-height: 1.55;
}

/* How I work */
.how-section { background: var(--c-bg-alt); }
.how-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem 2.5rem;
  margin-top: 1rem;
}
.how-list h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--c-text);
}
.how-list p {
  color: var(--c-text-muted);
  font-size: 0.9375rem;
}

/* Technologies (definition list) */
.tech-list {
  display: grid;
  grid-template-columns: minmax(140px, 200px) 1fr;
  gap: 0.875rem 2rem;
  margin: 0;
}
.tech-list dt {
  font-weight: 600;
  color: var(--c-text);
  font-size: 0.9375rem;
}
.tech-list dd {
  color: var(--c-text-muted);
  font-size: 0.9375rem;
  margin: 0;
  line-height: 1.55;
}
@media (max-width: 600px) {
  .tech-list { grid-template-columns: 1fr; gap: 0.25rem; }
  .tech-list dt { margin-top: 0.75rem; }
  .tech-list dt:first-child { margin-top: 0; }
}

/* Partner section */
.partner-block {
  border-left: 3px solid var(--c-accent);
  padding: 0.25rem 0 0.25rem 1.5rem;
  max-width: 70ch;
}
.partner-block p {
  color: var(--c-text-muted);
  margin-bottom: 1rem;
}
.partner-block a.inline-link {
  color: var(--c-accent);
  font-weight: 600;
  border-bottom: 1px solid transparent;
}
.partner-block a.inline-link:hover {
  border-bottom-color: var(--c-accent);
}

/* About */
.subsection-title {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-text-muted);
  margin-top: 2.5rem;
  margin-bottom: 1.25rem;
}
.company-intro {
  color: var(--c-text-muted);
  font-size: 1.0625rem;
  line-height: 1.65;
  max-width: 70ch;
}
.company-intro + .company-intro { margin-top: 0.75rem; }

.about-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  align-items: start;
}
.about-photo {
  width: 220px;
  height: 293px;
  object-fit: cover;
  border-radius: var(--r-md);
  border: 1px solid var(--c-border);
}
.about-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.about-role {
  color: var(--c-accent);
  font-weight: 600;
  font-size: 0.9375rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}
.about-bio {
  color: var(--c-text-muted);
  margin-bottom: 1.5rem;
  max-width: 65ch;
}
.about-socials {
  display: flex;
  gap: 0.75rem;
}
.about-socials a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
  color: var(--c-text-muted);
  transition: color 120ms ease, border-color 120ms ease;
}
.about-socials a:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
}
.about-socials svg {
  width: 18px;
  height: 18px;
}

@media (max-width: 640px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .about-photo {
    width: 160px;
    height: 213px;
  }
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}
.contact-methods {
  display: grid;
  gap: 1rem;
}
.contact-method {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  transition: border-color 120ms ease, background-color 120ms ease;
}
.contact-method:hover {
  border-color: var(--c-accent);
  background: var(--c-bg-alt);
}
.contact-method svg {
  width: 22px;
  height: 22px;
  color: var(--c-accent);
  flex-shrink: 0;
}
.contact-method .label {
  font-size: 0.8125rem;
  color: var(--c-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.contact-method .value {
  font-weight: 600;
  font-size: 1rem;
}

.contact-address {
  color: var(--c-text-muted);
}
.contact-address h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}
.contact-address address {
  font-style: normal;
  line-height: 1.7;
}

@media (max-width: 720px) {
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
}

/* Footer */
.site-footer {
  background: var(--c-bg-alt);
  border-top: 1px solid var(--c-border);
  padding-block: 2.5rem;
  font-size: 0.875rem;
  color: var(--c-text-muted);
}
.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem;
}
.footer-legal {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-legal a {
  border-bottom: 1px solid transparent;
}
.footer-legal a:hover {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
}

/* Legal pages (Impressum / Datenschutz) */
.legal {
  padding-block: var(--section-y);
}
.legal h1 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
}
.legal h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}
.legal h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}
.legal p, .legal ul, .legal address {
  color: var(--c-text-muted);
  margin-bottom: 0.75rem;
  max-width: 75ch;
}
.legal ul { padding-left: 1.25rem; list-style: disc; }
.legal address { font-style: normal; }
.legal a {
  color: var(--c-accent);
  border-bottom: 1px solid transparent;
}
.legal a:hover { border-bottom-color: var(--c-accent); }
.legal .back-link {
  display: inline-block;
  margin-bottom: 2rem;
  font-size: 0.9375rem;
  color: var(--c-text-muted);
}
.legal .back-link:hover { color: var(--c-accent); }

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}