@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url("../fonts/inter-latin.woff2") format("woff2");
}

@font-face {
  font-family: "EB Garamond";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("../fonts/eb-garamond-latin.woff2") format("woff2");
}

:root {
  --bg: #f7f6f2;
  --paper: #fffdf8;
  --ink: #20201d;
  --muted: #6f6d67;
  --line: #ded9cd;
  --accent: #1c6b6a;
  --accent-strong: #0f4746;
  --amber: #b56531;
  --blue: #1f5f97;
  --eth-red: #b7352d;
  --green: #607a48;
  --violet: #695477;
  --shadow: 0 18px 50px rgba(31, 29, 25, 0.09);
  --sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: "EB Garamond", Georgia, serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--sans);
  line-height: 1.6;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 14px clamp(20px, 5vw, 64px);
  border-bottom: 1px solid rgba(222, 217, 205, 0.8);
  background: rgba(247, 246, 242, 0.88);
  backdrop-filter: blur(16px);
}

.brand {
  display: grid;
  gap: 2px;
  text-decoration: none;
}

.brand-name {
  font-family: var(--serif);
  font-size: 1.35rem;
}

.brand-role,
.eyebrow,
.section-label {
  color: var(--muted);
  font-size: 0.73rem;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 20px;
  font-size: 0.92rem;
  font-weight: 600;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a:hover {
  color: var(--accent);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  align-items: center;
  gap: clamp(32px, 6vw, 76px);
  min-height: auto;
  padding: clamp(56px, 7vw, 88px) clamp(20px, 6vw, 84px) 28px;
}

.hero h1,
.section h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 820px;
  margin-top: 12px;
  font-size: clamp(3rem, 6.7vw, 6.2rem);
}

.lead {
  max-width: 760px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.24rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  font: 650 0.92rem var(--sans);
  text-decoration: none;
}

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

.hero-photo {
  position: relative;
  margin: 0;
  height: min(66vh, 620px);
  min-height: 460px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 58% 30%;
}

.hero-photo figcaption {
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 20px;
  max-width: 360px;
  padding: 12px 14px;
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.84);
  color: var(--muted);
  font-size: 0.88rem;
}

.section {
  padding: clamp(64px, 9vw, 112px) clamp(20px, 6vw, 84px);
  border-top: 1px solid var(--line);
}

.about-section {
  padding-top: clamp(44px, 6vw, 72px);
}

.section h2 {
  font-size: clamp(2.3rem, 5vw, 4.4rem);
}

.about-grid,
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.65fr);
  gap: clamp(28px, 6vw, 76px);
  align-items: start;
}

.about-text,
.section-head p,
.contact-section p {
  color: var(--muted);
  font-size: 1.04rem;
}

.timeline-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 42px 0;
}

.filter-button {
  min-height: 38px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--muted);
  cursor: pointer;
  font: 650 0.82rem var(--sans);
}

.filter-button.active,
.filter-button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.timeline-wrap {
  position: relative;
  display: grid;
  gap: 30px;
}

.timeline {
  position: relative;
  display: grid;
  gap: 0;
}

.timeline::before {
  display: none;
}

.timeline-row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 132px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding: 22px 0;
}

.timeline-row::before,
.period-break::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 42px;
  background: var(--phase-color, var(--line));
  transform: translateX(-50%);
}

.period-break::before {
  border-radius: 999px 999px 0 0;
}

.timeline-row:last-child::before {
  border-radius: 0 0 999px 999px;
}

.tone-hamburg { --phase-color: #1f5f97; }
.tone-eth { --phase-color: #b7352d; }
.tone-industry { --phase-color: #b56531; }
.tone-ibec { --phase-color: #607a48; }

.period-break {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 132px minmax(0, 1fr);
  gap: 28px;
  padding: 28px 0 8px;
}

.period-label {
  position: relative;
  z-index: 2;
  grid-column: 2;
  width: 132px;
  padding: 10px;
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  text-align: center;
  box-shadow: 0 8px 22px rgba(31, 29, 25, 0.08);
}

.period-label strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.14rem;
  font-weight: 400;
  line-height: 1.05;
}

.period-label span,
.period-label small {
  display: block;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
  text-transform: uppercase;
}

.period-label small {
  margin-top: 5px;
  font-size: 0.62rem;
  letter-spacing: 0;
  text-transform: none;
}

.row-left .event-card { grid-column: 1; }
.row-left .center-lane { grid-column: 2; grid-row: 1; }
.row-right .event-card { grid-column: 3; }
.row-right .center-lane { grid-column: 2; grid-row: 1; }
.row-left .milestone-label { grid-column: 1; justify-self: end; text-align: right; }
.row-right .milestone-label { grid-column: 3; justify-self: start; text-align: left; }

.timeline-row::after {
  content: "";
  position: absolute;
  top: 48px;
  height: 2px;
  background: var(--line);
}

.row-left::after {
  left: calc(50% - 27px);
  right: calc(50% + 66px);
}

.row-right::after {
  left: calc(50% + 27px);
  right: calc(50% - 66px);
}

.event-card {
  position: relative;
  overflow: hidden;
  border: 1px solid #cfc5b6;
  border-radius: 8px;
  background: #fffefb;
  box-shadow: 0 12px 28px rgba(31, 29, 25, 0.085);
}

.event-card[data-type="publication"] {
  border-radius: 0;
}

.event-card[data-type="talk"] {
  overflow: visible;
  border-radius: 28px;
}

.event-card[data-type="media"] {
  border-radius: 0 26px 0 26px;
}

.event-card[data-type="award"] {
  border-radius: 28px 6px 28px 6px;
}

.event-card[data-type="patent"] {
  border-radius: 0;
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 0 100%);
}

.event-card[data-type="patent"]::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 28px;
  height: 28px;
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: #eeeae1;
  pointer-events: none;
}

.event-card[data-type="talk"]::after {
  content: "";
  position: absolute;
  bottom: -12px;
  left: 30px;
  width: 24px;
  height: 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  transform: rotate(32deg) skew(12deg);
  pointer-events: none;
  z-index: 0;
}

.event-card[data-type="publication"]::after,
.event-card[data-type="media"]::after,
.event-card[data-type="award"]::after {
  content: "";
  position: absolute;
  inset: 7px;
  pointer-events: none;
}

.event-card[data-type="publication"]::after {
  border: 1px solid rgba(209, 199, 184, 0.78);
}

.event-card[data-type="media"]::after {
  border-top: 1px solid rgba(209, 199, 184, 0.85);
  border-bottom: 1px solid rgba(209, 199, 184, 0.85);
}

.event-card[data-type="award"]::after {
  border: 1px solid rgba(209, 199, 184, 0.75);
  border-radius: 22px 4px 22px 4px;
}

.milestone-row {
  padding: 10px 0;
}

.milestone-label {
  align-self: center;
  max-width: 220px;
  padding: 0 6px;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.2;
}

.milestone-label strong {
  display: block;
}

.milestone-label strong {
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 750;
}

.event-toggle {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 8px;
  width: 100%;
  padding: 18px;
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  font: inherit;
}

.event-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.event-date,
.event-type {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.event-type {
  padding: 3px 7px;
  border-radius: 999px;
  background: #e8e1d6;
}

.type-publication { color: var(--accent); }
.type-talk { color: var(--blue); }
.type-media { color: var(--violet); }
.type-award { color: var(--amber); }
.type-patent { color: #7a4638; }

.event-title {
  font-family: var(--serif);
  font-size: 1.28rem;
  line-height: 1.15;
}

.event-place {
  color: var(--muted);
  font-size: 0.9rem;
}

.event-details {
  position: relative;
  z-index: 1;
  display: none;
  padding: 0 18px 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.event-card.open .event-details {
  display: block;
}

.event-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.event-links a {
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 650;
  text-decoration: none;
}

code {
  color: var(--accent-strong);
  font-family: "Consolas", "Liberation Mono", monospace;
  font-size: 0.86em;
}

.center-lane {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 78px;
}

.center-lane .node {
  display: block;
  width: 24px;
  height: 24px;
  border: 4px solid var(--paper);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px rgba(31, 29, 25, 0.16);
}

.milestone-row .node {
  width: 16px;
  height: 16px;
  border-width: 3px;
}

.tone-hamburg .node { background: #1f5f97; }
.tone-eth .node { background: #b7352d; }
.tone-industry .node { background: #b56531; }
.tone-ibec .node { background: #607a48; }

.timeline-section-row {
  position: relative;
  display: grid;
  grid-template-columns: 176px minmax(0, 1fr);
  gap: clamp(18px, 3vw, 34px);
  padding: 14px 0;
}

.timeline-section-row::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 19px;
  width: 38px;
  background: var(--phase-color, var(--line));
  transform: translateX(-50%);
}

.timeline-section-row:first-child::before {
  border-radius: 999px 999px 0 0;
}

.timeline-section-row:last-child::before {
  border-radius: 0 0 999px 999px;
}

.timeline-marker {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  min-height: 74px;
  padding-top: 6px;
}

.timeline-marker .node {
  display: block;
  justify-self: center;
  width: 24px;
  height: 24px;
  margin-top: 6px;
  border: 4px solid var(--paper);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px rgba(31, 29, 25, 0.16);
}

.half-label {
  padding: 8px 8px 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.92);
  box-shadow: 0 8px 22px rgba(31, 29, 25, 0.06);
}

.half-label strong,
.half-label span,
.half-label small {
  display: block;
}

.half-label strong {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 400;
  line-height: 1;
}

.half-label span {
  color: var(--ink);
  font-size: 0.73rem;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.half-label small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.2;
}

.half-content {
  position: relative;
  padding: 0 0 0 24px;
}

.half-content::before {
  content: "";
  position: absolute;
  top: 28px;
  left: -18px;
  width: 36px;
  height: 1px;
  background: var(--line);
}

.milestone-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 0 0 10px;
}

.milestone-strip span {
  padding: 4px 8px;
  border: 1px solid #cfc5b6;
  border-radius: 999px;
  background: #fffefb;
  color: var(--ink);
  font-size: 0.72rem;
  font-weight: 760;
  box-shadow: 0 4px 10px rgba(31, 29, 25, 0.055);
}

.event-cluster {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 310px), 1fr));
  gap: 12px;
  align-items: start;
}

.event-cluster .event-card {
  box-shadow: 0 10px 24px rgba(31, 29, 25, 0.085);
}

.event-cluster .event-card:only-child {
  width: 100%;
  max-width: calc((100% - 12px) / 2);
}

.event-cluster .event-toggle {
  gap: 6px;
  padding: 14px 16px;
}

.event-cluster .event-title {
  font-size: 1.08rem;
}

.event-cluster .event-place {
  font-size: 0.83rem;
}

.event-cluster .event-details {
  padding: 0 16px 16px;
  font-size: 0.86rem;
}

.theme-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}

.theme-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.theme-card h3 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 400;
  line-height: 1.15;
}

.theme-card p {
  margin: 0;
  color: var(--muted);
}

.contact-section,
.footer {
  background: #eeebe4;
}

.contact-section {
  display: grid;
  gap: 14px;
  justify-items: start;
}

.footer {
  padding: 28px clamp(20px, 6vw, 84px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 900px) {
  .hero,
  .about-grid,
  .section-head,
  .timeline-wrap,
  .theme-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-photo {
    min-height: 360px;
    height: 420px;
  }

  .timeline::before {
    display: none;
  }

  .timeline-row,
  .period-break {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 14px;
  }

  .timeline-row::before,
  .period-break::before {
    left: 30px;
    width: 28px;
  }

  .row-left .event-card,
  .row-right .event-card,
  .row-left .milestone-label,
  .row-right .milestone-label {
    grid-column: 2;
  }

  .row-left .center-lane,
  .row-right .center-lane {
    grid-column: 1;
  }

  .timeline-row::after {
    left: 44px;
    right: auto;
    width: 30px;
  }

  .row-left .milestone-label,
  .row-right .milestone-label {
    justify-self: start;
    text-align: left;
  }

  .period-label {
    grid-column: 1 / -1;
    width: calc(100vw - 40px);
    text-align: center;
  }

  .timeline-section-row {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 14px;
  }

  .timeline-section-row::before {
    left: 18px;
    width: 28px;
    transform: translateX(-50%);
  }

  .timeline-marker {
    position: relative;
    top: auto;
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 8px;
  }

  .timeline-marker .node {
    width: 18px;
    height: 18px;
    border-width: 3px;
  }

  .half-label {
    padding: 6px;
  }

  .half-label strong {
    font-size: 1rem;
  }

  .half-label span,
  .half-label small {
    font-size: 0.62rem;
  }

  .half-content {
    padding-left: 10px;
  }

  .half-content::before {
    left: -18px;
    width: 22px;
  }

  .event-cluster {
    grid-template-columns: 1fr;
  }

  .event-cluster .event-card:only-child {
    max-width: none;
  }

}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
    gap: 14px;
  }

  .hero h1 {
    font-size: 3.1rem;
  }

  .timeline-row {
    gap: 10px;
  }
}