:root {
  --bg: #0c1117;
  --surface: rgba(255, 255, 255, 0.03);
  --text: #eff3f8;
  --muted: #9aa8bb;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #77e0c1;
  --shadow: 0 32px 80px rgba(0, 0, 0, 0.32);
  --container: min(1120px, calc(100vw - 2.5rem));
  --font-sans: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Georgia", "Times New Roman", serif;
  --font-mono: "Cascadia Code", "Consolas", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(119, 224, 193, 0.12), transparent 22rem),
    linear-gradient(180deg, #0b1016 0%, #0d1219 50%, #0a0f15 100%);
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 4.5rem 4.5rem;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent 85%);
  pointer-events: none;
}

img {
  display: block;
  max-width: 100%;
}

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

button,
a {
  transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  background: var(--accent);
  color: #071015;
  border-radius: 0.75rem;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(10, 15, 21, 0.74);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: 5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.8rem;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  font-family: var(--font-mono);
  color: var(--accent);
  background: rgba(255, 255, 255, 0.02);
}

.brand-text {
  display: grid;
  gap: 0.05rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.brand-text strong {
  font-size: 0.98rem;
  color: var(--text);
}

.site-nav {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.92rem;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
}

.language-switch {
  display: inline-flex;
  padding: 0.25rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.02);
}

.language-button {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 0.5rem 0.8rem;
  border-radius: 999px;
  font: inherit;
  cursor: pointer;
}

.language-button.is-active {
  background: var(--accent);
  color: #071015;
}

.section {
  padding: 5.5rem 0;
}

.hero {
  padding-top: 4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.eyebrow {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1,
.section-head h2 {
  margin: 0;
  line-height: 1.05;
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(3.2rem, 6.8vw, 6.2rem);
  max-width: 8ch;
}

.hero-subtitle {
  margin: 1rem 0 0;
  max-width: 30ch;
  font-size: clamp(1.05rem, 1.8vw, 1.45rem);
  color: var(--muted);
  letter-spacing: -0.01em;
}

.hero-lead,
.section-text,
.project-body p,
.timeline-copy p,
.education-block p {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 65ch;
}

.hero-lead {
  margin-top: 1.4rem;
  max-width: 58ch;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin: 2rem 0;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--line);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--accent);
  border-color: transparent;
  color: #061016;
}

.hero-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  padding: 1.4rem 0 0;
  margin: 2rem 0 0;
  border-top: 1px solid var(--line);
}

.hero-facts li {
  display: grid;
  gap: 0.3rem;
}

.fact-label,
.stat-label,
.project-stack,
.timeline-period,
.profile-detail {
  color: var(--muted);
  font-size: 0.85rem;
}

.hero-visual {
  position: relative;
}

.portrait-frame {
  position: relative;
  border-radius: 2rem;
  overflow: hidden;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.01)),
    linear-gradient(180deg, #1b232d, #0d1218);
  box-shadow: var(--shadow);
}

.portrait-frame::before {
  content: "";
  position: absolute;
  inset: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 1.4rem;
  pointer-events: none;
}

.portrait-frame img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center top;
  mix-blend-mode: luminosity;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.hero-stats div,
.education-block,
.principles,
.skills-note {
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 1.3rem;
  background: var(--surface);
}

.stat-value {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 1.5rem;
  font-weight: 700;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(240px, 0.34fr) minmax(0, 1fr);
  gap: 2rem 3rem;
  align-items: start;
  border-top: 1px solid var(--line);
  padding-top: 3rem;
}

.section-head {
  max-width: 18rem;
}

.section-head h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  max-width: 8ch;
  overflow-wrap: break-word;
  hyphens: auto;
}

.about-grid,
.contact-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
}

.plain-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.plain-list li + li {
  margin-top: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.skills-layout {
  display: grid;
  gap: 1.2rem;
}

.skill-group {
  display: grid;
  gap: 0.8rem;
  padding-bottom: 1.3rem;
  border-bottom: 1px solid var(--line);
}

.skill-group h3,
.project-body h3,
.timeline-copy h3,
.education-block h3,
.principles h3 {
  margin: 0;
  font-size: 1.2rem;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 2.2rem;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
  color: var(--text);
  font-size: 0.92rem;
}

.project-list,
.timeline {
  display: grid;
}

.project-row,
.timeline-item,
.profile-link {
  display: grid;
  grid-template-columns: minmax(90px, 120px) minmax(0, 1fr);
  gap: 1.4rem;
  padding: 1.4rem 0;
  border-top: 1px solid var(--line);
}

.project-row:first-child,
.timeline-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.project-index {
  margin: 0;
  font-family: var(--font-mono);
  color: var(--accent);
}

.timeline-location {
  margin-top: 0.25rem;
}

.contact-links,
.profiles-list {
  display: grid;
  gap: 0.85rem;
}

.contact-links a,
.profile-link {
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.025);
}

.contact-links a:hover,
.profile-link:hover,
.contact-links a:focus-visible,
.profile-link:focus-visible {
  border-color: rgba(119, 224, 193, 0.5);
  transform: translateY(-1px);
}

.profile-link {
  align-items: center;
}

.site-footer {
  border-top: 1px solid var(--line);
}

.site-footer p,
.site-footer a {
  color: var(--muted);
  font-size: 0.95rem;
}

[data-lang] {
  display: none;
}

body[data-language="de"] [data-lang="de"],
body[data-language="en"] [data-lang="en"] {
  display: inline;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  animation: rise 700ms ease forwards;
}

.reveal:nth-child(2) {
  animation-delay: 90ms;
}

.reveal:nth-child(3) {
  animation-delay: 180ms;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 920px) {
  .header-inner {
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 1rem 0;
  }

  .site-nav {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    padding-top: 0.25rem;
    overflow-x: auto;
  }

  .hero-grid,
  .about-grid,
  .contact-layout,
  .section-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 2rem;
  }

  .hero h1 {
    max-width: none;
  }

  .section-grid {
    gap: 1.5rem;
  }
}

@media (max-width: 700px) {
  .section {
    padding: 4rem 0;
  }

  .hero-facts,
  .hero-stats,
  .project-row,
  .timeline-item,
  .profile-link {
    grid-template-columns: 1fr;
  }

  .header-inner,
  .footer-inner {
    display: grid;
    justify-content: stretch;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}