/* ==========================================================================
   Dirk Jung — Portfolio / One-Pager
   ========================================================================== */

:root {
  /* Colors */
  --color-bg: #ffffff;
  --color-bg-alt: #f6f7f9;
  --color-text: #1c1d20;
  --color-text-dim: #55585f;
  --color-line: #e3e5e9;
  --color-line-strong: #c9cbd1;
  --color-accent: #0179c8;
  --color-accent-dark: #045a95;

  /* Type */
  --font-display: "Space Grotesk", "IBM Plex Sans", sans-serif;
  --font-body: "Inter", "IBM Plex Sans", sans-serif;

  /* Spacing */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
  --space-7: 9rem;

  --max-width: 1120px;
  --nav-height: 84px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-text);
  color: #fff;
  padding: 0.75em 1.25em;
  z-index: 200;
}
.skip-link:focus { left: 1em; top: 1em; }

/* ==========================================================================
   Navigation
   ========================================================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: height 0.35s ease, border-color 0.35s ease, background 0.35s ease;
}

.nav.is-scrolled {
  height: 64px;
  border-bottom-color: var(--color-line);
  background: rgba(255, 255, 255, 0.92);
}

.nav-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand { display: flex; align-items: center; }
.nav-logo {
  height: 34px;
  width: auto;
  transition: height 0.35s ease;
}
.nav.is-scrolled .nav-logo { height: 26px; }

.nav-links {
  display: flex;
  gap: var(--space-4);
}

.nav-links a {
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  position: relative;
  padding: 0.25em 0;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width 0.25s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--color-text);
}
.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--color-text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-height) + var(--space-5)) var(--space-3) var(--space-5);
  position: relative;
}

.hero-inner {
  max-width: 760px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-logo {
  width: min(360px, 70vw);
  margin-bottom: var(--space-5);
  opacity: 0;
  transform: translateY(8px);
  animation: hero-logo-in 1s ease 0.1s forwards;
}

@keyframes hero-logo-in {
  to { opacity: 1; transform: translateY(0); }
}

.hero-headline {
  font-size: clamp(1.6rem, 4.4vw, 2.75rem);
  font-weight: 600;
  letter-spacing: 0.01em;
}

.hero-tags {
  margin: var(--space-4) 0 var(--space-1);
  font-size: 0.9375rem;
  color: var(--color-text-dim);
  letter-spacing: 0.02em;
}

.hero-location {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-line-strong);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.scroll-hint {
  position: absolute;
  bottom: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
}

.scroll-line {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, transparent, var(--color-line-strong) 40%, var(--color-line-strong));
  animation: scroll-pulse 2.4s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.25; }
  50% { opacity: 1; }
}

/* ==========================================================================
   Sections
   ========================================================================== */

.section {
  padding: var(--space-6) var(--space-3);
}

.section-alt { background: var(--color-bg-alt); }

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.eyebrow {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  margin: 0 0 var(--space-2);
}

.section-title {
  font-size: clamp(1.5rem, 3.2vw, 2.25rem);
  max-width: 22ch;
  margin-bottom: var(--space-4);
}

.contact .section-title { margin-bottom: var(--space-3); }

.profil-text {
  max-width: 640px;
  font-size: 1.0625rem;
  color: var(--color-text-dim);
}

.profil-text p:last-child { margin-bottom: 0; }

/* ==========================================================================
   Kompetenzen
   ========================================================================== */

.competence-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5) var(--space-4);
}

.competence {
  border-top: 1px solid var(--color-line);
  padding-top: var(--space-3);
}

.competence-number {
  display: block;
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--color-accent);
  letter-spacing: 0.06em;
  margin-bottom: var(--space-1);
}

.competence h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
}

.competence ul li {
  font-size: 0.9375rem;
  color: var(--color-text-dim);
  padding: 0.3em 0;
  border-bottom: 1px solid var(--color-line);
}

.competence ul li:last-child { border-bottom: none; }

/* ==========================================================================
   Timeline
   ========================================================================== */

.timeline {
  border-left: 1px solid var(--color-line);
}

.timeline-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-4);
  padding: var(--space-4) 0 var(--space-4) var(--space-4);
  margin-left: -1px;
  border-left: 1px solid var(--color-line);
  position: relative;
}

.timeline-item:first-child { padding-top: 0; }
.timeline-item:last-child { padding-bottom: 0; }

.timeline-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: calc(var(--space-4) + 0.35em);
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-accent);
}

.timeline-item:first-child::before { top: 0.35em; }

.timeline-year {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  color: var(--color-text-dim);
  white-space: nowrap;
  padding-top: 0.1em;
}

.timeline-content h3 {
  font-size: 1.15rem;
  margin-bottom: 0.2em;
}

.timeline-company {
  color: var(--color-accent);
  font-size: 0.9375rem;
  margin-bottom: 0.75em;
}

.timeline-content ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em 1.25em;
}

.timeline-content ul li {
  font-size: 0.875rem;
  color: var(--color-text-dim);
  position: relative;
  padding-left: 1em;
}

.timeline-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 1px;
  background: var(--color-line-strong);
}

/* ==========================================================================
   Tag lists (Systeme, Qualifikationen, Interessen)
   ========================================================================== */

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75em 1em;
}

.tag-list li {
  font-size: 0.875rem;
  padding: 0.5em 1em;
  border: 1px solid var(--color-line-strong);
  border-radius: 2px;
  color: var(--color-text-dim);
}

.tag-list-quiet li {
  border-color: var(--color-line);
  font-size: 0.8125rem;
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact {
  text-align: center;
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.contact .eyebrow,
.contact .section-title { display: inline-block; }
.contact .section-inner { display: flex; flex-direction: column; align-items: center; }

.contact-location {
  color: var(--color-text-dim);
  margin-bottom: var(--space-4);
}

.contact-button {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 1em 2em;
  border: 1px solid var(--color-text);
  border-radius: 2px;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.contact-button:hover,
.contact-button:focus-visible {
  background: var(--color-text);
  color: #fff;
}

.contact-button span { transition: transform 0.25s ease; }
.contact-button:hover span { transform: translateX(3px); }

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  border-top: 1px solid var(--color-line);
  padding: var(--space-3);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: 0.8125rem;
  color: var(--color-text-dim);
}

.footer-links { display: flex; gap: var(--space-3); }
.footer-links a:hover,
.footer-links a:focus-visible { color: var(--color-text); }

/* ==========================================================================
   Reveal-on-scroll
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-logo { animation: none; opacity: 1; transform: none; }
  .scroll-line { animation: none; }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 860px) {
  .competence-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .timeline-item { grid-template-columns: 1fr; gap: var(--space-1); }
  .timeline-item::before { top: 0.35em; }
}

@media (max-width: 700px) {
  :root { --nav-height: 64px; }

  .nav-toggle { display: flex; }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--color-line);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.25s ease;
  }

  .nav-links.is-open {
    max-height: 320px;
    opacity: 1;
  }

  .nav-links a {
    padding: 1em var(--space-3);
    border-top: 1px solid var(--color-line);
    font-size: 0.8125rem;
  }

  .nav-links a::after { display: none; }

  .section { padding: var(--space-5) var(--space-2); }
  .contact { padding-top: var(--space-6); padding-bottom: var(--space-6); }
}