/* ==========================================================================
   layout.css — Navbar, Sektionen, Karten, Timeline, Formular, Dialoge, Footer
   ========================================================================== */

/* ---- Glass-Utility --------------------------------------------------------- */

.glass {
  background: var(--surface-solid);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
}

@supports (backdrop-filter: blur(1px)) {
  @media (min-width: 769px) {
    .glass {
      background: var(--surface);
      backdrop-filter: blur(14px);
    }
  }
}

/* ---- Buttons ---------------------------------------------------------------- */

.btn {
  display: inline-block;
  padding: 0.7em 1.5em;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step-0);
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease,
    border-color 0.2s ease, color 0.2s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-0);
}

.btn-primary:hover {
  background: var(--accent-soft);
  color: var(--bg-0);
  box-shadow: 0 6px 30px var(--accent-glow), 0 0 0 1px var(--accent-dim);
}

.btn-ghost {
  border-color: var(--surface-border);
  color: var(--text-hi);
}

.btn-ghost:hover {
  border-color: var(--accent-dim);
  color: var(--accent-soft);
}

/* ---- Scroll-Progressbar ------------------------------------------------------ */

#scroll_progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 120;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: left;
}

/* ---- Navbar ------------------------------------------------------------------- */

#site_header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

#site_header.scrolled {
  background: rgba(11, 15, 20, 0.82);
  border-bottom-color: var(--surface-border);
}

@supports (backdrop-filter: blur(1px)) {
  #site_header.scrolled {
    background: rgba(11, 15, 20, 0.6);
    backdrop-filter: blur(14px);
  }
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--content-width);
  height: var(--nav-height);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.nav-logo img {
  height: 44px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  position: relative;
  color: var(--text-mid);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step--1);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav-link:hover {
  color: var(--text-hi);
  text-decoration: none;
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-link.active {
  color: var(--text-hi);
}

.lang-switch {
  display: flex;
  border: 1px solid var(--surface-border);
  border-radius: 999px;
  overflow: hidden;
}

.lang-switch button {
  padding: 0.35em 0.85em;
  font-family: var(--font-display);
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--text-dim);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.lang-switch button[aria-pressed="true"] {
  background: var(--accent);
  color: var(--bg-0);
}

.lang-switch button:not([aria-pressed="true"]):hover {
  color: var(--text-hi);
}

/* Burger (nur mobil sichtbar) */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  z-index: 110;
}

.burger-line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-hi);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-burger[aria-expanded="true"] .burger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-burger[aria-expanded="true"] .burger-line:nth-child(2) {
  opacity: 0;
}

.nav-burger[aria-expanded="true"] .burger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---- Sektionen ------------------------------------------------------------------ */

.section {
  padding: clamp(4rem, 10vh, 7rem) 1.5rem;
}

.section-alt {
  background: var(--bg-1);
}

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

.section-narrow {
  max-width: 44rem;
}

.section-intro {
  max-width: 40rem;
  margin-top: 1rem;
}

.section h2 {
  margin-bottom: 0.5rem;
}

/* ---- Hero -------------------------------------------------------------------------- */

.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100svh;
  min-height: 100dvh;
  padding: calc(var(--nav-height) + 2rem) 1.5rem 4rem;
  overflow: clip;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
}

.blob-1 {
  width: 44vw;
  height: 44vw;
  top: -12%;
  right: -8%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.16), transparent 65%);
}

.blob-2 {
  width: 36vw;
  height: 36vw;
  bottom: -10%;
  left: -10%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12), transparent 65%);
}

.blob-3 {
  width: 22vw;
  height: 22vw;
  top: 38%;
  left: 32%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.08), transparent 65%);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
  max-width: var(--content-width);
  margin-inline: auto;
  width: 100%;
}

/* Opener bewusst eine Stufe kleiner als das frühere Namens-H1 — bescheidener Auftritt */
.hero h1 {
  font-size: clamp(2rem, 1.5rem + 2.8vw, 3.6rem);
  max-width: 18ch;
}

.hero-intro {
  margin-top: 1.5rem;
  font-size: var(--step-0);
  color: var(--text-mid);
  max-width: 46ch;
  text-wrap: pretty;
}

.hero-intro strong {
  color: var(--text-hi);
  font-weight: 600;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.5rem;
}

.hero-portrait {
  position: relative;
  justify-self: center;
  width: min(340px, 70vw);
  aspect-ratio: 1;
}

.hero-portrait::before {
  content: "";
  position: absolute;
  inset: -14px;
  border-radius: 50%;
  border: 1px solid var(--accent-dim);
  box-shadow: var(--shadow-glow), inset 0 0 40px rgba(45, 212, 191, 0.07);
}

.hero-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 28% 50%;
  border-radius: 50%;
  border: 1px solid var(--surface-border);
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 1.75rem;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  color: var(--text-dim);
  font-size: var(--step--1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.scroll-cue:hover {
  color: var(--accent);
  text-decoration: none;
}

/* ---- About ----------------------------------------------------------------------- */

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  margin-top: 2.5rem;
  align-items: start;
}

.about-bio p + p {
  margin-top: 1.25em;
}

.about-card {
  padding: 2rem;
}

.about-portrait {
  width: 108px;
  height: 108px;
  border-radius: 50%;
  border: 2px solid var(--accent-dim);
  box-shadow: 0 0 30px var(--accent-glow);
  margin-bottom: 1.5rem;
}

.fact-list {
  display: grid;
  gap: 0.9rem;
}

.fact {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 0.75rem;
  font-size: var(--step--1);
}

.fact dt {
  color: var(--text-dim);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.78rem;
  padding-top: 0.15em;
}

.fact dd {
  color: var(--text-mid);
}

.print-cv-hint {
  margin-top: 1.75rem;
}

/* ---- Stats -------------------------------------------------------------------------- */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.stat {
  padding: 2rem 1.5rem;
  text-align: center;
}

.stat-value {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-3);
  line-height: 1.05;
  color: var(--accent);
  text-shadow: 0 0 30px var(--accent-glow);
  font-variant-numeric: tabular-nums;
}

.stat-label {
  display: block;
  margin-top: 0.6rem;
  font-size: var(--step--1);
  color: var(--text-mid);
}

/* ---- Karriere-Timeline ------------------------------------------------------------------ */

.career-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.8fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.career-sticky {
  position: sticky;
  top: calc(var(--nav-height) + 2rem);
}

.career-year {
  margin-top: 1.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-3);
  color: transparent;
  -webkit-text-stroke: 1px var(--accent-dim);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  transition: opacity 0.3s ease;
}

.timeline {
  position: relative;
  list-style: none;
  padding-left: 2.25rem;
}

/* Grundlinie (statisch) + gezeichnete Linie (motion.css animiert --timeline-progress) */
.timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 7px;
  width: 2px;
  background: var(--surface-border);
}

.timeline::after {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 7px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-soft));
  transform: scaleY(var(--timeline-progress, 1));
  transform-origin: top;
}

.tl-entry {
  position: relative;
  padding-bottom: 2rem;
}

.tl-entry:last-child {
  padding-bottom: 0;
}

.tl-dot {
  position: absolute;
  top: 8px;
  left: -2.25rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-0);
  border: 2px solid var(--surface-border);
  transition: border-color 0.4s ease, box-shadow 0.4s ease, background-color 0.4s ease;
}

.tl-entry.in-view .tl-dot {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 0 16px var(--accent-dim);
}

.tl-card {
  padding: 1.75rem 2rem;
}

.tl-card-highlight {
  border-color: var(--accent-dim);
  box-shadow: 0 0 40px rgba(45, 212, 191, 0.08);
}

.tl-years {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
}

.tl-org {
  font-size: var(--step--1);
  color: var(--text-dim);
  margin: 0.2rem 0 0.75rem;
}

/* ---- Award-Chips & Badges -------------------------------------------------------------------- */

.award-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  margin-top: 1rem;
  padding: 0.4em 0.95em;
  font-size: var(--step--1);
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--accent-soft);
  background: var(--accent-glow);
  border: 1px solid var(--accent-dim);
  border-radius: 999px;
}

.badge-list,
.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0;
  list-style: none;
}

.badge-list {
  margin-top: 1.75rem;
}

.badge {
  padding: 0.45em 1em;
  font-size: var(--step--1);
  color: var(--text-mid);
  border: 1px solid var(--surface-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
}

.chip-list .award-chip {
  margin-top: 0;
}

/* ---- mbits ------------------------------------------------------------------------------------- */

.mbits-card {
  margin-top: 2.5rem;
  padding: clamp(1.75rem, 4vw, 3rem);
}

.mbits-card p + p {
  margin-top: 1.25em;
}

.mbits-awards-title {
  margin: 2.25rem 0 1rem;
  font-size: var(--step-0);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-mid);
}

.mbits-link {
  margin-top: 2.25rem;
}

/* ---- Publikationen ------------------------------------------------------------------------------- */

.pub-list {
  display: grid;
  gap: 1.1rem;
  margin-top: 2.5rem;
}

.pub-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.5rem;
  padding: 1.6rem 1.9rem;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

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

.pub-number {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-1);
  color: var(--text-dim);
  opacity: 0.7;
  line-height: 1.3;
  font-variant-numeric: tabular-nums;
}

.pub-title {
  font-size: var(--step-0);
  font-weight: 500;
  color: var(--text-hi);
}

.pub-authors {
  margin-top: 0.5rem;
  font-size: var(--step--1);
  color: var(--text-mid);
}

.pub-ref {
  margin-top: 0.35rem;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.pub-link {
  margin-top: 0.6rem;
  font-size: var(--step--1);
}

.pub-link:empty {
  display: none;
}

.pub-more {
  margin-top: 2rem;
  text-align: center;
}

.pub-more.all-shown {
  display: none;
}

/* ---- Kontakt ---------------------------------------------------------------------------------------- */

#contact_form {
  margin-top: 2.5rem;
  padding: clamp(1.75rem, 4vw, 2.5rem);
}

.form-field {
  margin-bottom: 1.4rem;
}

.form-field label {
  display: block;
  margin-bottom: 0.45rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step--1);
  color: var(--text-hi);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.8em 1em;
  color: var(--text-hi);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-field input.field-error,
.form-field textarea.field-error {
  border-color: #f87171;
}

.form-field textarea {
  resize: vertical;
  min-height: 9rem;
}

.form-note {
  margin-top: 1rem;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.contact-direct {
  margin-top: 1.75rem;
  font-size: var(--step--1);
}

/* ---- Footer -------------------------------------------------------------------------------------------- */

.footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--content-width);
  margin-inline: auto;
  padding: 2.25rem 1.5rem;
  border-top: 1px solid var(--surface-border);
  font-size: var(--step--1);
  color: var(--text-dim);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links button {
  color: var(--text-mid);
  font-size: var(--step--1);
}

.footer-links button:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---- Dialoge (Impressum / Datenschutz) ------------------------------------------------------------------- */

.legal-dialog {
  max-width: min(44rem, calc(100vw - 2rem));
  max-height: min(85dvh, 60rem);
  margin: auto;
  padding: 0;
  color: var(--text-mid);
  background: var(--bg-1);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
}

.legal-dialog::backdrop {
  background: rgba(5, 8, 12, 0.7);
}

@supports (backdrop-filter: blur(1px)) {
  .legal-dialog::backdrop {
    backdrop-filter: blur(6px);
  }
}

.dialog-body {
  padding: clamp(1.5rem, 4vw, 2.75rem);
}

.dialog-body h2 {
  margin-bottom: 1rem;
}

.dialog-body h3 {
  margin: 1.75rem 0 0.5rem;
  font-size: var(--step-0);
  font-weight: 500;
  color: var(--text-hi);
}

.dialog-body form {
  margin-top: 2.25rem;
}

.en-note {
  font-style: italic;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

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

@media (max-width: 1024px) {
  .career-grid {
    grid-template-columns: 1fr;
  }

  .career-sticky {
    position: static;
  }

  .career-year {
    display: none;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.5rem;
  }

  .hero-text {
    order: 2;
  }

  .hero-portrait {
    order: 1;
    width: min(240px, 55vw);
  }

  .hero h1 {
    max-width: none;
  }

  .hero-intro {
    margin-inline: auto;
  }

  .hero-cta {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  :root {
    --parallax-range: 60px;
  }

  .nav-burger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    inset: 0;
    z-index: 105;
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    background: rgba(11, 15, 20, 0.97);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
  }

  .nav-menu.open {
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    font-size: var(--step-1);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.9rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .pub-card {
    grid-template-columns: 1fr;
    gap: 0.5rem;
    padding: 1.4rem 1.5rem;
  }

  .pub-number {
    font-size: var(--step--1);
  }

  .timeline {
    padding-left: 1.9rem;
  }

  .tl-dot {
    left: -1.9rem;
  }

  .tl-card {
    padding: 1.4rem 1.5rem;
  }

  .fact {
    grid-template-columns: 6rem 1fr;
  }
}

@media (max-width: 480px) {
  .section {
    padding-inline: 1.1rem;
  }

  .hero-cta .btn {
    width: 100%;
    text-align: center;
  }

  .footer {
    flex-direction: column;
    text-align: center;
  }
}