:root {
  --bg: #f5f0e8;
  --text: #0f172a;
  --muted: #475569;
  --border: #ddd5c8;
  --surface: #faf7f2;

  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #eff6ff;
  --ring: #93c5fd;

  --radius: 14px;
  --container: 960px;

  --header-height: 64px;
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;

  --font:
    ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

html {
  scroll-padding-top: var(--header-height);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0.75rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}

.skip-link:focus {
  left: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  border-bottom: 1px solid var(--border);
  background: rgba(245, 240, 232, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.brand {
  text-decoration: none;
  color: inherit;
}

.brand-name {
  font-weight: 650;
  letter-spacing: -0.02em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  align-items: center;
  justify-content: flex-end;
}

.nav-link {
  display: inline-flex;
  padding: 0.5rem 0.75rem;
  border-radius: 12px;
  text-decoration: none;
  color: var(--muted);
}

.nav-link:hover {
  background: var(--accent-soft);
  color: var(--accent-hover);
}

.main {
  padding-block: var(--space-5);
}

.section {
  padding-block: var(--space-6);
  scroll-margin-top: calc(var(--header-height) + 16px);
}

.section + .section {
  border-top: 1px solid var(--border);
}

.hero {
  padding-top: var(--space-6);
}

.hero-title {
  margin: 0;
  font-size: clamp(2rem, 2.7vw + 1.2rem, 3.25rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-top: var(--space-4);
  align-items: center;
}

@media (min-width: 720px) {
  .hero-row {
    flex-direction: row;
    align-items: flex-start;
  }
}

.hero-text {
  flex: 1;
  min-width: 0;
}

.hero-photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border);
  flex-shrink: 0;
}

@media (min-width: 720px) {
  .hero-photo {
    width: 240px;
    height: 240px;
  }
}

.hero-subtitle {
  margin-top: var(--space-3);
  margin-bottom: 0;
  color: var(--muted);
  max-width: 70ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

h2 {
  margin: 0 0 var(--space-3) 0;
  font-size: clamp(1.4rem, 1vw + 1.1rem, 1.8rem);
  letter-spacing: -0.02em;
}

h3 {
  margin: 0 0 var(--space-2) 0;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 var(--space-3) 0;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
  border-radius: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 0.95rem;
  border-radius: 14px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  line-height: 1;
}

.button:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.button-secondary {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}

.button-secondary:hover {
  background: var(--accent-soft);
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

@media (min-width: 720px) {
  .grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: var(--space-4);
}

.list {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--muted);
}

.projects {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 720px) {
  .projects {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }
}

.meta {
  margin: var(--space-3) 0 0 0;
  display: grid;
  gap: var(--space-2);
}

.meta dt {
  font-size: 0.9rem;
  color: var(--muted);
}

.meta dd {
  margin: 0;
}

.meta a {
  color: var(--accent);
  text-decoration: none;
}

.meta a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.sep {
  margin-inline: 0.25rem;
  color: var(--muted);
}

.faq {
  display: grid;
  gap: var(--space-3);
}

.faq details {
  cursor: pointer;
}

.faq summary {
  list-style: none;
  padding: var(--space-3) var(--space-4);
  margin: calc(-1 * var(--space-4));
  margin-bottom: 0;
}

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

.faq summary::before {
  content: "+ ";
  color: var(--accent);
  font-weight: 700;
  margin-right: 0.5rem;
}

.faq details[open] summary::before {
  content: "− ";
}

.faq details[open] summary {
  margin-bottom: var(--space-3);
}

.faq p {
  margin: 0 0 var(--space-2) 0;
  color: var(--muted);
}

@media (min-width: 720px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-4);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  color: var(--muted);
}

.footer-link {
  color: var(--accent);
  text-decoration: none;
}

.footer-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }
}

/* ---- Language switch ---- */
html[lang="de"] [lang="en"] {
  display: none;
}

html[lang="en"] [lang="de"] {
  display: none;
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--surface);
  margin-left: var(--space-2);
}

.lang-toggle button {
  border: none;
  background: transparent;
  padding: 0.35rem 0.55rem;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--muted);
  font-family: var(--font);
  line-height: 1;
}

.lang-toggle button:hover {
  color: var(--text);
}

.lang-toggle button.active {
  background: var(--accent);
  color: #fff;
}