@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=IBM+Plex+Mono:wght@400;500;600&display=swap");

:root {
  --ink: #171725;
  --muted: #5f6475;
  --accent: #2596be;
  --navy: #1d2451;
  --green: #18a67d;
  --amber: #d39b24;
  --coral: #df6d5f;
  --line: #d7dee8;
  --paper: #fbfcfd;
  --soft: #eef4f7;
  --white: #fff;
  --max: 1120px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

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

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(23, 23, 37, .12);
  background: rgba(251, 252, 253, .92);
  backdrop-filter: blur(18px);
}

.lab-nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.lab-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 900;
  line-height: 1;
}

.lab-brand::before {
  content: "VI";
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 2px solid var(--ink);
  background: var(--white);
  color: var(--accent);
  font-weight: 900;
}

.lab-brand span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font: 600 11px/1 "IBM Plex Mono", monospace;
  text-transform: uppercase;
}

.nav,
.lab-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: flex-end;
  color: var(--muted);
  font: 800 13px/1.4 Inter, system-ui, sans-serif;
  text-transform: none;
}

.lab-links a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  border-bottom: 2px solid transparent;
}

.lab-links a:hover,
.lab-links a:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
  outline: none;
}

.lab-links a[aria-current="page"] {
  color: var(--ink);
}

.hero {
  padding: 58px 0 22px;
}

.lane-page {
  padding: 0 24px;
}

.lane-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, 0.72fr);
  gap: 28px;
  align-items: stretch;
  padding: 56px 0 28px;
}

.lane-hero-main {
  display: grid;
  align-content: center;
  min-height: 360px;
  padding: 44px;
  border: 1px solid var(--line);
  background: var(--white);
}

.lane-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
  font: 800 12px/1.4 "IBM Plex Mono", monospace;
  text-transform: uppercase;
}

.lane-kicker span {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(37, 150, 190, .42);
  background: #edf8fb;
  color: var(--ink);
}

.lane-hero-main h1 {
  max-width: 820px;
}

.lane-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.map-board {
  display: grid;
  align-content: space-between;
  min-height: 360px;
  border: 1px solid var(--line);
  background: #f7fbff;
}

.map-board-head {
  padding: 26px 26px 18px;
  border-bottom: 1px solid var(--line);
}

.map-board-head p {
  margin-top: 8px;
  font-size: 13px;
}

.lane-steps {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
}

.lane-steps a {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  min-height: 62px;
  padding: 12px 22px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.lane-steps li:last-child a {
  border-bottom: 0;
}

.lane-steps a:hover,
.lane-steps a:focus-visible {
  color: var(--ink);
  background: rgba(37, 150, 190, .08);
  outline: none;
}

.lane-steps a[aria-current="page"] {
  color: var(--ink);
  background: var(--white);
}

.lane-steps span {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--accent);
  font: 800 11px/1 "IBM Plex Mono", monospace;
}

.lane-steps strong {
  display: block;
  font-size: 14px;
  line-height: 1.2;
}

.lane-steps small {
  display: block;
  margin-top: 3px;
  font: 700 10px/1.2 "IBM Plex Mono", monospace;
  text-transform: uppercase;
}

.eyebrow,
.meta {
  color: var(--accent);
  font: 700 12px/1.4 "IBM Plex Mono", monospace;
  text-transform: uppercase;
}

.meta {
  font-size: 11px;
}

h1 {
  margin: 12px 0 0;
  font-size: clamp(38px, 7vw, 68px);
  line-height: .98;
  letter-spacing: 0;
}

.lead {
  max-width: 760px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 19px;
}

.notes-board {
  margin: 4px 0 26px;
}

.file-tabs {
  display: flex;
  gap: 6px;
  align-items: flex-end;
  overflow-x: auto;
  padding: 0 4px;
}

.file-tab {
  position: relative;
  display: grid;
  gap: 3px;
  min-width: 152px;
  min-height: 64px;
  padding: 12px 16px 13px;
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: 10px 10px 0 0;
  background: #eef4f7;
  color: var(--muted);
  cursor: pointer;
  text-align: left;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease, border-color 160ms ease;
}

.file-tab:hover,
.file-tab:focus-visible {
  color: var(--ink);
  border-color: rgba(37, 150, 190, .5);
  transform: translateY(-2px);
  outline: none;
}

.file-tab.active,
.file-tab[aria-selected="true"] {
  z-index: 1;
  background: var(--white);
  color: var(--ink);
  transform: translateY(1px);
}

.file-tab span {
  font-size: 14px;
  font-weight: 900;
  line-height: 1.15;
}

.file-tab small {
  color: var(--accent);
  font: 800 10px/1.25 "IBM Plex Mono", monospace;
  text-transform: uppercase;
}

.file-panels {
  border: 1px solid var(--line);
  background: var(--white);
}

.note-panel {
  padding: 30px;
}

.note-panel[hidden] {
  display: none;
}

.note-panel-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) max-content;
  gap: 18px;
  align-items: start;
  margin-bottom: 18px;
}

.note-panel h2 {
  margin-top: 0;
}

.note-status {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 6px 10px;
  border: 1px solid rgba(37, 150, 190, .34);
  background: #edf8fb;
  color: var(--accent);
  font: 800 10px/1.2 "IBM Plex Mono", monospace;
  text-transform: uppercase;
  white-space: nowrap;
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.note-card {
  padding: 20px;
  border: 1px solid var(--line);
  background: #fbfcfd;
}

.note-card strong {
  display: block;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.2;
}

.note-card p {
  font-size: 14px;
}

.note-list {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.note-list li {
  padding-left: 18px;
  border-left: 3px solid rgba(37, 150, 190, .42);
  color: var(--muted);
}

.log {
  display: grid;
  gap: 14px;
  margin: 30px 0 18px;
}

.item,
.next {
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--white);
}

.next {
  margin: 14px 0 20px;
  background: #eff7fb;
}

.route-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0 64px;
}

.route-card {
  display: grid;
  align-content: start;
  min-height: 150px;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--white);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.route-card:hover,
.route-card:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(37, 150, 190, 0.48);
  box-shadow: 0 16px 34px rgba(29, 36, 81, 0.09);
  outline: none;
}

.route-card.map {
  background: var(--navy);
  color: var(--white);
}

.route-card span {
  color: var(--accent);
  font: 700 11px/1.4 "IBM Plex Mono", monospace;
  text-transform: uppercase;
}

.route-card.map span,
.route-card.map p {
  color: rgba(255, 255, 255, 0.76);
}

.route-card strong {
  display: block;
  margin-top: 10px;
  font-size: 20px;
  line-height: 1.1;
}

.route-card p {
  margin-top: 10px;
  font-size: 14px;
}

h2 {
  margin: 10px 0 0;
  font-size: 24px;
  line-height: 1.12;
  letter-spacing: 0;
}

p {
  margin: 12px 0 0;
  color: var(--muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 16px;
  border: 1px solid var(--ink);
  background: var(--white);
  font-weight: 800;
}

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

@media (max-width: 680px) {
  .wrap,
  .lane-page { padding: 0 20px; }
  .hero { padding-top: 44px; }
  .lane-hero {
    grid-template-columns: 1fr;
    padding-top: 34px;
  }

  .lane-hero-main {
    min-height: auto;
    padding: 30px 22px;
  }

  .map-board {
    min-height: auto;
  }

  .note-panel {
    padding: 22px;
  }

  .note-panel-head,
  .note-grid {
    grid-template-columns: 1fr;
  }

  .note-status {
    width: fit-content;
  }

  .lab-nav,
  .route-nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding-top: 18px;
    padding-bottom: 18px;
  }

  .lab-links {
    justify-content: flex-start;
    gap: 12px;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 2px;
  }
}