/* 1. Nachtmodus design tokens */
:root {
  --nacht-asphalt: #080b10;
  --nacht-carbon: #111722;
  --nacht-panel: #171f2d;
  --nacht-paper: #f4f1e8;
  --nacht-muted: #aeb7c8;
  --nacht-cobalt: #4f7cff;
  --nacht-signal: #ff6a2b;
  --nacht-line: rgba(244, 241, 232, 0.18);
  --nacht-measure: 78rem;
  --nacht-cut: 1.4rem;
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--nacht-asphalt);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 0;
  overflow-x: hidden;
  background:
    linear-gradient(90deg, transparent 0 72%, rgba(79, 124, 255, 0.06) 72% 72.1%, transparent 72.1%),
    var(--nacht-asphalt);
  color: var(--nacht-paper);
}

a,
p,
li,
dd,
h1,
h2,
h3,
summary {
  overflow-wrap: anywhere;
}

a {
  color: inherit;
  text-underline-offset: 0.23em;
  text-decoration-thickness: 0.08em;
}

a:hover {
  color: #ffffff;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--nacht-signal);
  outline-offset: 4px;
}

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

/* 2. Skip link and masthead */
.jump-to-content {
  position: fixed;
  z-index: 50;
  top: -5rem;
  left: 1rem;
  padding: 0.8rem 1rem;
  background: var(--nacht-signal);
  color: #101217;
  font-weight: 800;
}

.jump-to-content:focus {
  top: 1rem;
}

.nightshift-topline {
  max-width: var(--nacht-measure);
  min-height: 5.25rem;
  margin: 0 auto;
  padding: 1rem 1.4rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 2rem;
  border-bottom: 1px solid var(--nacht-line);
}

.nightshift-wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.08rem;
  font-weight: 850;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.nightshift-wordmark svg {
  width: 2.55rem;
  height: 2.55rem;
  flex: 0 0 auto;
}

.nightshift-navigation ul {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  gap: 1.4rem;
  list-style: none;
}

.nightshift-navigation a {
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.nightshift-menu-trigger {
  display: none;
  border: 1px solid var(--nacht-line);
  padding: 0.75rem 0.95rem;
  background: var(--nacht-carbon);
  color: var(--nacht-paper);
  font: inherit;
  font-weight: 800;
}

.nightshift-status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--nacht-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nightshift-status::before {
  width: 0.52rem;
  height: 0.52rem;
  background: var(--nacht-signal);
  content: "";
}

/* 3. Hero and route ribbon */
.editorial-stage {
  max-width: var(--nacht-measure);
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 5.5rem) 1.4rem 2.5rem;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: end;
}

.stage-copy {
  min-width: 0;
  padding-bottom: 1.5rem;
}

.section-code {
  margin: 0 0 1rem;
  color: var(--nacht-cobalt);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.editorial-stage h1,
.page-lead h1,
.error-signal h1 {
  margin: 0;
  max-width: 13ch;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3rem, 7.4vw, 7.8rem);
  font-weight: 500;
  letter-spacing: -0.065em;
  line-height: 0.91;
}

.stage-copy > p:not(.section-code) {
  max-width: 39rem;
  margin: 1.5rem 0 0;
  color: var(--nacht-muted);
  font-size: 1.08rem;
}

.stage-action {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.95rem 1.15rem;
  background: var(--nacht-signal);
  color: #101217;
  font-weight: 850;
  text-decoration: none;
}

.stage-visual {
  min-width: 0;
  margin: 0;
  position: relative;
}

.stage-visual::before {
  position: absolute;
  z-index: 2;
  top: -1rem;
  right: -1rem;
  width: 43%;
  height: 0.35rem;
  background: var(--nacht-signal);
  content: "";
}

.stage-visual img {
  width: 100%;
  aspect-ratio: 8 / 7;
  object-fit: cover;
  object-position: center;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 87% 100%, 0 100%);
}

.stage-visual figcaption {
  max-width: 46rem;
  padding-top: 0.8rem;
  color: var(--nacht-muted);
  font-size: 0.78rem;
}

.route-ribbon {
  max-width: var(--nacht-measure);
  margin: 0 auto;
  padding: 1.2rem 1.4rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--nacht-line);
  border-bottom: 1px solid var(--nacht-line);
}

.route-ribbon div {
  min-width: 0;
  padding: 0.7rem 1rem;
  border-left: 1px solid var(--nacht-line);
}

.route-ribbon div:first-child {
  border-left: 0;
}

.route-ribbon span {
  display: block;
  color: var(--nacht-muted);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.route-ribbon strong {
  display: block;
  margin-top: 0.25rem;
}

/* 4. Shared editorial modules */
.night-content {
  max-width: var(--nacht-measure);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 5.5rem) 1.4rem;
}

.page-lead {
  max-width: 61rem;
  padding-bottom: 2.7rem;
  border-bottom: 1px solid var(--nacht-line);
}

.page-lead h1 {
  max-width: 16ch;
  font-size: clamp(2.9rem, 6vw, 6.2rem);
}

.page-lead > p:last-child {
  max-width: 48rem;
  margin-top: 1.4rem;
  color: var(--nacht-muted);
  font-size: 1.08rem;
}

.location-trail {
  max-width: var(--nacht-measure);
  margin: 1rem auto 0;
  padding: 0 1.4rem;
  display: flex;
  gap: 0.65rem;
  color: var(--nacht-muted);
  font-size: 0.86rem;
}

.location-trail a,
.location-trail > span[aria-hidden="true"] {
  flex: 0 0 auto;
}

.location-trail > span:last-child {
  min-width: 0;
}

.signal-grid,
.hardware-ledger,
.source-stack,
.question-bank,
.city-sequence,
.policy-columns,
.contact-switchboard {
  margin-top: 2.8rem;
}

.signal-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 1.2rem;
}

.signal-grid article,
.contact-switchboard article,
.policy-columns article {
  min-width: 0;
  padding: clamp(1.35rem, 3vw, 2.4rem);
  background: var(--nacht-carbon);
  border-top: 0.25rem solid var(--nacht-cobalt);
}

.signal-grid article:nth-child(3n + 2) {
  border-top-color: var(--nacht-signal);
}

.signal-grid article:nth-child(3n) {
  grid-column: span 2;
}

h2,
h3 {
  line-height: 1.12;
}

h2 {
  margin: 0 0 0.9rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.7rem, 3.2vw, 2.8rem);
  font-weight: 500;
  letter-spacing: -0.035em;
}

h3 {
  margin: 0 0 0.65rem;
  font-size: 1.04rem;
}

p {
  max-width: 72ch;
}

.fact-terminal {
  margin: 2.8rem 0;
  padding: 1.6rem;
  border: 1px solid var(--nacht-cobalt);
  background: rgba(79, 124, 255, 0.07);
}

.fact-terminal dl {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem 2rem;
}

.fact-terminal div {
  min-width: 0;
}

.fact-terminal dt {
  color: var(--nacht-cobalt);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.fact-terminal dd {
  margin: 0.25rem 0 0;
  font-weight: 700;
}

.reading-column {
  max-width: 50rem;
  margin-top: 3rem;
}

.reading-column h2 {
  margin-top: 2.6rem;
}

.reading-column li + li {
  margin-top: 0.55rem;
}

.editorial-warning {
  margin: 2.8rem 0;
  padding: 1.5rem 1.7rem;
  background: var(--nacht-paper);
  color: #101217;
  clip-path: polygon(0 0, 98% 0, 100% 25%, 100% 100%, 0 100%);
}

/* 5. Tables, steps, sources, and FAQ */
.hardware-ledger {
  width: 100%;
  border-collapse: collapse;
}

.hardware-ledger th,
.hardware-ledger td {
  padding: 1rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--nacht-line);
}

.hardware-ledger th {
  color: var(--nacht-cobalt);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.checkpoint-steps {
  margin: 3rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  list-style: none;
  counter-reset: checkpoint;
}

.checkpoint-steps li {
  min-width: 0;
  padding: 1.45rem 1.45rem 1.45rem 5rem;
  position: relative;
  border-top: 1px solid var(--nacht-line);
  counter-increment: checkpoint;
}

.checkpoint-steps li::before {
  position: absolute;
  top: 1rem;
  left: 0;
  color: var(--nacht-signal);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2.8rem;
  content: "0" counter(checkpoint);
}

.question-bank details {
  padding: 1.2rem 0;
  border-top: 1px solid var(--nacht-line);
}

.question-bank summary {
  cursor: pointer;
  font-weight: 800;
  font-size: 1.05rem;
}

.question-bank p {
  color: var(--nacht-muted);
}

.source-stack article {
  padding: 1.6rem 0;
  border-top: 1px solid var(--nacht-line);
}

.source-stack dl {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: 0.45rem 1rem;
}

.source-stack dt {
  color: var(--nacht-muted);
  font-weight: 750;
}

.source-stack dd {
  margin: 0;
}

.city-sequence {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--nacht-line);
}

.city-sequence article {
  min-width: 0;
  padding: 1.4rem;
  border-left: 1px solid var(--nacht-line);
}

.city-sequence article:first-child {
  border-left: 0;
}

.city-sequence time {
  color: var(--nacht-signal);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-weight: 800;
}

.policy-columns,
.contact-switchboard {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.legal-gap-list {
  margin: 1.4rem 0;
  padding: 1.2rem 1.2rem 1.2rem 2.4rem;
  background: rgba(255, 106, 43, 0.1);
  border-left: 0.35rem solid var(--nacht-signal);
}

/* 6. Footer */
.after-hours-footer {
  max-width: var(--nacht-measure);
  margin: 2rem auto 0;
  padding: 3rem 1.4rem 2.2rem;
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 2rem;
  border-top: 1px solid var(--nacht-line);
}

.after-hours-footer strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.6rem;
  font-weight: 500;
}

.after-hours-footer nav {
  display: flex;
  flex-wrap: wrap;
  align-content: start;
  justify-content: flex-end;
  gap: 0.7rem 1.2rem;
}

.after-hours-footer small {
  grid-column: 1 / -1;
  color: var(--nacht-muted);
}

/* 7. Error page and responsive behavior */
.error-signal {
  max-width: 52rem;
  min-height: 60vh;
  margin: 0 auto;
  padding: clamp(4rem, 12vw, 10rem) 1.4rem;
}

.error-signal strong {
  display: block;
  margin-bottom: 1rem;
  color: var(--nacht-signal);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 1.2rem;
}

@media (max-width: 860px) {
  .nightshift-topline {
    grid-template-columns: auto auto;
  }

  .nightshift-status {
    display: none;
  }

  .nightshift-navigation {
    grid-column: 1 / -1;
  }

  .nightshift-navigation ul {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .js .nightshift-menu-trigger {
    display: inline-block;
    justify-self: end;
  }

  .js .nightshift-navigation[hidden] {
    display: none;
  }

  .editorial-stage {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .stage-visual {
    order: -1;
  }

  .stage-visual img {
    aspect-ratio: 16 / 9;
  }

  .route-ribbon,
  .city-sequence {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .route-ribbon div:nth-child(3),
  .city-sequence article:nth-child(3) {
    border-left: 0;
  }
}

@media (max-width: 620px) {
  .nightshift-topline,
  .editorial-stage,
  .route-ribbon,
  .night-content,
  .location-trail,
  .after-hours-footer {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .signal-grid,
  .policy-columns,
  .contact-switchboard,
  .fact-terminal dl,
  .after-hours-footer {
    grid-template-columns: 1fr;
  }

  .signal-grid article:nth-child(3n) {
    grid-column: auto;
  }

  .route-ribbon,
  .city-sequence {
    grid-template-columns: 1fr;
  }

  .route-ribbon div,
  .route-ribbon div:nth-child(3),
  .city-sequence article,
  .city-sequence article:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--nacht-line);
  }

  .route-ribbon div:first-child,
  .city-sequence article:first-child {
    border-top: 0;
  }

  .hardware-ledger {
    min-width: 41rem;
  }

  .table-viewport {
    max-width: 100%;
    overflow-x: auto;
  }

  .source-stack dl {
    grid-template-columns: 1fr;
  }

  .after-hours-footer nav {
    justify-content: flex-start;
  }
}

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