@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@600;700&family=Inter:wght@400;500;600&display=swap");

:root {
  --bg: #1b1a18;
  --surface: #242220;
  --surface-alt: #2c2a27;
  --text: #f3f1ec;
  --muted: #a8a39a;
  --accent: #8fbfae;
  --accent-contrast: #14201c;
  --border: #3a3733;
  --radius: 14px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

.visually-hidden {
  position: absolute;
  left: -9999px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background-color: var(--bg);
  line-height: 1.65;
  font-size: 16px;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  line-height: 1.25;
  margin: 0;
}

/* Hero block on the homepage */
.hero {
  margin-bottom: 28px;
}

.hero .tagline {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.95em;
  margin: 8px 0 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95em;
  text-decoration: none;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
}

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

.btn-secondary {
  color: var(--text);
  background-color: var(--surface-alt);
}

.btn:hover {
  filter: brightness(1.08);
}

main h1 {
  font-size: 28px;
  margin-bottom: 24px;
}

main h1::before {
  content: "> ";
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 600;
}

main h2 {
  font-size: 20px;
  margin: 28px 0 12px;
}

main h2:first-child {
  margin-top: 0;
}

main h3:not(:first-of-type) {
  margin-top: 32px;
}

main p {
  margin: 0 0 16px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background-color: var(--accent);
  color: var(--accent-contrast);
  padding: 10px 16px;
  border-radius: 0 0 var(--radius) 0;
  font-weight: 600;
  z-index: 100;
}

.skip-link:focus {
  left: 0;
}

.layout {
  display: flex;
  min-height: 90vh;
  align-items: flex-start;
  gap: 24px;
  padding: 24px;
}

#navbar {
  width: 25%;
  min-width: 220px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  position: sticky;
  top: 24px;
}

main {
  flex: 1;
  min-width: 0;
  max-width: 820px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow);
}

footer {
  text-align: center;
  padding: 16px;
  font-size: 0.9em;
  color: var(--muted);
}

#navbar a {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  padding: 8px 10px;
  border-radius: 8px;
  margin: 4px 0;
  border-left: 3px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

#navbar a:hover {
  background-color: var(--surface-alt);
  border-left-color: var(--accent);
}

.external-icon {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 0.85em;
}

a {
  color: inherit;
}

main p a,
.about-text a {
  color: var(--accent);
  text-decoration: none;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-repeat: no-repeat;
  background-position: left bottom;
  background-size: 0% 1px;
  transition: background-size 0.2s ease;
}

main p a:hover,
.about-text a:hover {
  background-size: 100% 1px;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

#navbar a.active,
#navbar a[aria-current="page"] {
  background-color: var(--accent);
  color: var(--accent-contrast);
  border-left-color: var(--accent-contrast);
}

#navbar a[aria-current="page"]::after {
  content: " (aktuelle Seite)";
  position: absolute;
  left: -9999px;
}

/* Jump links on about page */
.page-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 28px;
  padding: 0;
  list-style: none;
}

.jump-link {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--accent);
  background-color: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  text-decoration: none;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.jump-link:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

/* Skills tables side by side */
.skills-columns {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.skills-columns > div {
  flex: 1 1 280px;
  min-width: 0;
}

.skills-columns h3:not(:first-of-type) {
  margin-top: 0;
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius);
  -webkit-overflow-scrolling: touch;
}

/* Tables */
table {
  width: 100%;
  min-width: 320px;
  border-collapse: collapse;
  margin-top: 16px;
  overflow: hidden;
  border-radius: var(--radius);
}

th,
td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

thead th {
  background-color: var(--surface-alt);
  font-family: var(--font-display);
  font-size: 0.95em;
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr {
  transition: background-color 0.15s ease;
}

tbody tr:hover {
  background-color: var(--surface-alt);
}

/* Project cards */
.project-card {
  background-color: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.project-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.project-card h2 {
  margin-top: 0;
  font-size: 20px;
}

.project-card h3 {
  font-family: var(--font-body);
  font-size: 0.85em;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 8px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background-color: var(--bg);
  border: 1px solid var(--border);
  color: var(--accent);
  padding: 4px 12px;
  border-radius: 999px;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.tag:hover {
  background-color: var(--accent);
  color: var(--accent-contrast);
}

/* Contact cards */
.contact-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background-color: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.contact-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.contact-card svg {
  flex-shrink: 0;
  color: var(--accent);
}

@media (max-width: 800px) {
  .layout {
    flex-direction: column;
    padding: 16px;
    gap: 16px;
  }

  #navbar {
    width: 100%;
    min-width: auto;
    position: static;
  }

  main {
    padding: 20px;
    max-width: 100%;
  }

  main h1 {
    font-size: 24px;
  }

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

  .btn {
    justify-content: center;
  }

  .skills-columns {
    flex-direction: column;
  }

  th,
  td {
    padding: 10px 12px;
    font-size: 0.92em;
  }
}

@media (max-width: 420px) {
  body {
    font-size: 15px;
  }

  main {
    padding: 16px;
  }

  .project-card {
    padding: 18px;
  }
}

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

  * {
    transition: none !important;
    scroll-behavior: auto !important;
  }
}