/* Drum Tech — built on the "Steel blueprint at midnight" system:
   near-black canvases, 1px steel hairlines, 4px corners, one rationed red. */

:root {
  /* Colors */
  --color-signal-red: #e32735;
  --color-carbon: #0b0405;
  --color-graphite: #150e0f;
  --color-ember: #1a1213;
  --color-steel: #382e30;
  --color-slate: #858182;
  --color-chalk: #ffffff;
  --color-foil: #000000;
  --color-prose: rgba(255, 255, 255, 0.82);
  --color-line-light: #e5e5e5;

  /* Typography */
  --font-archivo: 'Archivo', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-space-mono: 'Space Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --text-caption: 12px;
  --text-body-sm: 14px;
  --text-body: 16px;
  --text-subheading: 24px;
  --text-heading: clamp(30px, 4.4vw, 40px);
  --text-display: clamp(38px, 6.4vw, 56px);
  --tracking: -0.02em;

  /* Spacing */
  --spacing-8: 8px;
  --spacing-16: 16px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  --spacing-40: 40px;
  --spacing-48: 48px;
  --spacing-64: 64px;

  /* Layout */
  --page-max-width: 1200px;
  --section-gap: 80px;
  --card-padding: 32px;
  --element-gap: 24px;
  --gutter: 24px;
  --nav-height: 64px;

  --radius: 4px;

  --hero-gradient: linear-gradient(90deg, #ffffff 18%, #e32735);
}

@media (max-width: 640px) {
  :root {
    --section-gap: 64px;
    --card-padding: 24px;
    --gutter: 16px;
  }
}

/* ---------- Base ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 24px);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--color-carbon);
  color: var(--color-chalk);
  font-family: var(--font-archivo);
  font-size: var(--text-body);
  line-height: 1.5;
  letter-spacing: var(--tracking);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
}

h1,
h2,
h3,
h4 {
  font-weight: 500;
  letter-spacing: var(--tracking);
  margin: 0;
}

p {
  margin: 0;
}

:focus-visible {
  outline: 2px solid var(--color-signal-red);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 100;
  padding: 12px 16px;
  background: var(--color-chalk);
  color: var(--color-carbon);
  border-radius: var(--radius);
  font-size: var(--text-body-sm);
}

.skip-link:focus {
  top: 12px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.container {
  width: 100%;
  max-width: calc(var(--page-max-width) + var(--gutter) * 2);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  padding: var(--section-gap) 0;
  background: var(--color-carbon);
}

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

/* ---------- Mono labels / badges ---------- */

.mono {
  font-family: var(--font-space-mono);
  font-size: var(--text-caption);
  line-height: 1.5;
  letter-spacing: normal;
  text-transform: uppercase;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--color-slate);
  border-radius: var(--radius);
  color: var(--color-slate);
  font-family: var(--font-space-mono);
  font-size: var(--text-caption);
  line-height: 1;
  letter-spacing: normal;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
}

a.badge:hover {
  color: var(--color-chalk);
  border-color: var(--color-chalk);
}

.badge--sm {
  padding: 6px 8px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: var(--spacing-24);
}

.eyebrow__index {
  color: var(--color-slate);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-archivo);
  font-size: var(--text-body-sm);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: var(--tracking);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn--primary {
  background: var(--color-signal-red);
  color: var(--color-chalk);
}

.btn--primary:hover {
  background: #c81e2b;
}

.btn--ghost {
  background: var(--color-graphite);
  border-color: var(--color-steel);
  color: var(--color-chalk);
}

.btn--ghost:hover {
  border-color: var(--color-slate);
}

.btn--light {
  background: var(--color-carbon);
  color: var(--color-chalk);
}

.btn__arrow {
  transition: transform 0.15s ease;
}

.btn:hover .btn__arrow {
  transform: translateX(3px);
}

/* ---------- Navigation ---------- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--nav-height);
  background: var(--color-chalk);
  color: var(--color-carbon);
}

.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--spacing-32);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-carbon);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  flex-shrink: 0;
}

.brand svg {
  width: 28px;
  height: 28px;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-24);
  margin-right: auto;
}

.nav a {
  position: relative;
  color: var(--color-carbon);
  text-decoration: none;
  font-size: var(--text-body-sm);
  padding: 20px 0;
}

.nav a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 12px;
  height: 2px;
  background: transparent;
}

.nav a:hover::after {
  background: var(--color-steel);
}

.nav a[aria-current='page'] {
  color: var(--color-signal-red);
}

.nav a[aria-current='page']::after {
  background: var(--color-signal-red);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-16);
}

.header-actions .btn {
  padding: 8px 16px;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-line-light);
  border-radius: var(--radius);
  background: transparent;
  color: var(--color-carbon);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  position: relative;
  transition: transform 0.2s ease;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
}

.nav-toggle span::before {
  top: -5px;
}

.nav-toggle span::after {
  top: 5px;
}

.nav-toggle[aria-expanded='true'] span {
  background: transparent;
}

.nav-toggle[aria-expanded='true'] span::before {
  transform: translateY(5px) rotate(45deg);
}

.nav-toggle[aria-expanded='true'] span::after {
  transform: translateY(-5px) rotate(-45deg);
}

@media (max-width: 960px) {
  .site-header .container {
    justify-content: space-between;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--gutter) 24px;
    background: var(--color-chalk);
    border-top: 1px solid var(--color-line-light);
    border-bottom: 1px solid var(--color-line-light);
    margin: 0;
    display: none;
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 14px 0;
    border-bottom: 1px solid var(--color-line-light);
    font-size: var(--text-body);
  }

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

  .header-actions .btn {
    display: none;
  }
}

main {
  padding-top: var(--nav-height);
}

/* ---------- Hero (home) ---------- */

.hero {
  position: relative;
  min-height: min(860px, calc(100svh - var(--nav-height)));
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--color-carbon);
  isolation: isolate;
}

.hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 30% 50%;
  filter: grayscale(1) contrast(1.05);
  opacity: 0.55;
}

.hero__media::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(11, 4, 5, 0.95) 0%, rgba(11, 4, 5, 0.75) 45%, rgba(11, 4, 5, 0.35) 100%),
    linear-gradient(0deg, var(--color-carbon) 0%, rgba(11, 4, 5, 0) 45%);
}

.hero__stage {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 58%;
  z-index: -1;
}

.hero__stage canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: pan-y;
}

.hero__stage canvas:active {
  cursor: grabbing;
}

.hero__labels {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.kit-label {
  position: absolute;
  left: 0;
  top: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-slate);
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.4s ease;
  will-change: transform;
}

.kit-label.is-visible {
  opacity: 1;
}

.kit-label__node {
  width: 7px;
  height: 7px;
  background: var(--color-chalk);
  flex-shrink: 0;
}

.kit-label--accent .kit-label__node {
  background: var(--color-signal-red);
}

.kit-label__line {
  width: 40px;
  height: 1px;
  background: var(--color-steel);
}

.kit-label__text {
  padding: 4px 8px;
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
  background: rgba(11, 4, 5, 0.8);
}

.hero__content {
  position: relative;
  padding-top: var(--spacing-64);
  padding-bottom: var(--spacing-64);
  pointer-events: none;
}

.hero__content > * {
  pointer-events: auto;
}

.hero__title {
  max-width: 620px;
  font-size: var(--text-display);
  line-height: 1.1;
  font-weight: 500;
  letter-spacing: var(--tracking);
}

.hero__lede {
  max-width: 520px;
  margin-top: var(--spacing-24);
  color: rgba(255, 255, 255, 0.72);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-16);
  margin-top: var(--spacing-32);
}

.readouts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 640px;
  margin-top: var(--spacing-48);
  border-top: 1px solid var(--color-steel);
}

.readout {
  padding: 16px 16px 0 0;
}

.readout + .readout {
  padding-left: 16px;
  border-left: 1px solid var(--color-steel);
}

.readout__value {
  display: block;
  font-size: var(--text-subheading);
  line-height: 1.2;
}

.readout__label {
  color: var(--color-slate);
}

.hero__hint {
  position: absolute;
  right: var(--gutter);
  bottom: 24px;
  color: var(--color-slate);
}

.hero-rule {
  height: 1px;
  background: var(--hero-gradient);
}

@media (max-width: 960px) {
  .hero {
    flex-direction: column;
    align-items: stretch;
    min-height: 0;
  }

  .hero__stage {
    position: relative;
    width: 100%;
    height: 340px;
    order: -1;
    z-index: 0;
  }

  .hero__hint,
  .hero__labels {
    display: none;
  }

  .hero__content {
    padding-top: 0;
    padding-bottom: var(--spacing-48);
  }
}

@media (max-width: 560px) {
  .readouts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .readout:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }

  .readout:nth-child(n + 3) {
    border-top: 1px solid var(--color-steel);
    margin-top: 16px;
  }
}

/* ---------- Section heads ---------- */

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--spacing-32);
  margin-bottom: var(--spacing-48);
}

.section-head__title {
  font-size: var(--text-heading);
  line-height: 1.2;
  max-width: 640px;
}

.section-head__lede {
  margin-top: var(--spacing-16);
  max-width: 560px;
  color: var(--color-slate);
}

@media (max-width: 760px) {
  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- Tabs (step-indicator style) ---------- */

.tabs {
  display: flex;
  gap: var(--spacing-32);
  border-bottom: 1px solid var(--color-steel);
  margin-bottom: var(--spacing-32);
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
  display: none;
}

.tab {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 0 0 14px;
  border: 0;
  background: none;
  color: var(--color-slate);
  font-family: var(--font-archivo);
  font-size: var(--text-body-sm);
  letter-spacing: var(--tracking);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
}

.tab:hover {
  color: var(--color-chalk);
}

.tab[aria-selected='true'],
.tab[aria-current='page'] {
  color: var(--color-signal-red);
}

.tab[aria-selected='true']::after,
.tab[aria-current='page']::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--color-signal-red);
}

.tab .mono {
  color: var(--color-slate);
}

/* ---------- Directory table ---------- */

.directory {
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
  overflow: hidden;
}

.directory__head,
.directory__row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1.1fr) minmax(0, 0.8fr) minmax(0, 2fr) 32px;
  gap: var(--spacing-24);
  align-items: center;
  padding: 0 var(--spacing-24);
}

.directory__head {
  height: 44px;
  background: var(--color-graphite);
  color: var(--color-slate);
  border-bottom: 1px solid var(--color-steel);
}

.directory__row {
  min-height: 64px;
  text-decoration: none;
  border-bottom: 1px solid var(--color-steel);
  transition: background-color 0.15s ease;
}

.directory__row:last-child {
  border-bottom: 0;
}

.directory__row:hover {
  background: var(--color-graphite);
}

.directory__row[hidden] {
  display: none;
}

.directory__code {
  color: var(--color-slate);
}

.directory__city {
  font-size: var(--text-body);
}

.directory__region {
  color: var(--color-slate);
  font-size: var(--text-body-sm);
}

.directory__guide {
  color: var(--color-slate);
  font-size: var(--text-body-sm);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.directory__go {
  justify-self: end;
  color: var(--color-slate);
  transition: transform 0.15s ease, color 0.15s ease;
}

.directory__row:hover .directory__go {
  color: var(--color-chalk);
  transform: translateX(3px);
}

@media (max-width: 760px) {
  .directory__head {
    display: none;
  }

  .directory__row {
    grid-template-columns: 64px minmax(0, 1fr) 20px;
    gap: var(--spacing-16);
    padding: 16px;
  }

  .directory__region,
  .directory__guide {
    display: none;
  }
}

/* ---------- Steps + chat mockup ---------- */

.process {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: var(--spacing-48);
  align-items: stretch;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-bottom: 1px solid var(--color-steel);
  margin: var(--spacing-40) 0 var(--spacing-32);
}

.step {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  padding: 0 16px 14px 0;
  border: 0;
  background: none;
  color: var(--color-slate);
  font-family: var(--font-archivo);
  font-size: var(--text-body-sm);
  letter-spacing: var(--tracking);
  text-align: left;
  cursor: pointer;
}

.step + .step {
  padding-left: 16px;
}

.step:hover {
  color: var(--color-chalk);
}

.step[aria-selected='true'] {
  color: var(--color-signal-red);
}

.step[aria-selected='true']::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--color-signal-red);
}

.step .mono {
  color: var(--color-slate);
}

.step-panel h3 {
  font-size: var(--text-subheading);
  line-height: 1.2;
  margin-bottom: var(--spacing-16);
}

.step-panel p {
  color: var(--color-slate);
  max-width: 560px;
}

.step-panel .btn {
  margin-top: var(--spacing-24);
}

.chat {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
  background: var(--color-ember);
  overflow: hidden;
  min-height: 420px;
}

.chat__photo {
  position: absolute;
  inset: 0;
}

.chat__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.32;
  filter: grayscale(1);
}

.chat__photo::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(26, 18, 19, 0.2) 0%, var(--color-ember) 70%);
}

.chat__bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-steel);
  background: var(--color-graphite);
  color: var(--color-slate);
}

.chat__bar i {
  width: 6px;
  height: 6px;
  background: var(--color-steel);
}

.chat__bar span {
  margin-left: auto;
}

.chat__body {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 12px;
  padding: 24px 16px;
  flex: 1;
}

.bubble {
  max-width: 88%;
  padding: 12px 14px;
  border-radius: var(--radius);
  font-size: var(--text-body-sm);
  line-height: 1.45;
}

.bubble--user {
  align-self: flex-end;
  background: var(--color-steel);
}

.bubble--bot {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border: 1px solid var(--color-steel);
  background: var(--color-graphite);
  color: rgba(255, 255, 255, 0.86);
}

.bubble--bot > svg {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
}

.bubble ul {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.bubble li {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 4px 0;
  color: var(--color-slate);
}

.bubble li::before {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--color-chalk);
}

@media (max-width: 960px) {
  .process {
    grid-template-columns: minmax(0, 1fr);
  }

  .chat {
    min-height: 360px;
  }
}

@media (max-width: 560px) {
  .step {
    flex-direction: column;
    gap: 2px;
  }
}

/* ---------- Cards ---------- */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-32);
}

@media (max-width: 960px) {
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-24);
  }
}

@media (max-width: 640px) {
  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
  background: var(--color-carbon);
  text-decoration: none;
  overflow: hidden;
  transition: border-color 0.15s ease;
}

.section--graphite .card {
  background: var(--color-graphite);
}

.card:hover {
  border-color: var(--color-slate);
}

.card[hidden] {
  display: none;
}

.card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-ember);
  border-bottom: 1px solid var(--color-steel);
  overflow: hidden;
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.35) brightness(0.85);
  transition: filter 0.3s ease, transform 0.4s ease;
}

.card:hover .card__media img {
  filter: grayscale(0) brightness(1);
  transform: scale(1.02);
}

.card__media .badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(11, 4, 5, 0.85);
}

.card__body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: var(--spacing-24);
  flex: 1;
}

.card__meta {
  display: flex;
  gap: 12px;
  color: var(--color-slate);
}

.card__title {
  font-size: 20px;
  line-height: 1.25;
}

.card__excerpt {
  color: var(--color-slate);
  font-size: var(--text-body-sm);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__more {
  margin-top: auto;
  padding-top: 8px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-body-sm);
  color: var(--color-chalk);
}

/* Feature card with mini UI mockup (gear reviews) */

.feature {
  padding: var(--card-padding);
}

.feature .card__body {
  padding: 0;
}

.mockup {
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
  background: var(--color-graphite);
  margin-bottom: var(--spacing-24);
  overflow: hidden;
}

.mockup__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--color-steel);
  color: var(--color-slate);
}

.mockup__dot {
  width: 6px;
  height: 6px;
  background: var(--color-steel);
}

.mockup__dot--live {
  background: var(--color-signal-red);
}

.mockup__bar span {
  margin-left: auto;
}

.mockup__img {
  aspect-ratio: 16 / 10;
  background: var(--color-ember);
}

.mockup__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.mockup__specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--color-steel);
}

.mockup__specs div {
  padding: 8px 12px;
  color: var(--color-slate);
}

.mockup__specs div + div {
  border-left: 1px solid var(--color-steel);
}

.mockup__specs b {
  display: block;
  color: var(--color-chalk);
  font-weight: 400;
}

/* Connector line between feature cards */

.connector {
  position: relative;
  height: 48px;
  margin: 0 auto;
}

.connector::before {
  content: '';
  position: absolute;
  left: 16.66%;
  right: 16.66%;
  top: 50%;
  height: 1px;
  background: var(--color-steel);
}

.connector i {
  position: absolute;
  top: calc(50% - 4px);
  width: 8px;
  height: 8px;
  background: var(--color-chalk);
  transform: translateX(-50%);
}

.connector i:nth-child(1) {
  left: 16.66%;
}

.connector i:nth-child(2) {
  left: 50%;
}

.connector i:nth-child(3) {
  left: 83.33%;
  background: var(--color-signal-red);
}

@media (max-width: 960px) {
  .connector {
    display: none;
  }
}

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

.about {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--spacing-64);
  align-items: start;
}

.about__media {
  position: sticky;
  top: calc(var(--nav-height) + 32px);
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
  overflow: hidden;
}

.about__media img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: grayscale(0.2);
}

.about__caption {
  display: flex;
  justify-content: space-between;
  padding: 12px 16px;
  border-top: 1px solid var(--color-steel);
  background: var(--color-graphite);
  color: var(--color-slate);
}

.about__text p + p {
  margin-top: var(--spacing-16);
}

.about__text p {
  color: var(--color-slate);
}

.about__text p:first-child {
  color: var(--color-chalk);
  font-size: var(--text-subheading);
  line-height: 1.3;
}

.about__sign {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: var(--spacing-32);
  padding-top: var(--spacing-24);
  border-top: 1px solid var(--color-steel);
}

.about__sign svg {
  width: 32px;
  height: 32px;
}

@media (max-width: 860px) {
  .about {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--spacing-40);
  }

  .about__media {
    position: static;
  }

  .about__media img {
    aspect-ratio: 16 / 10;
  }
}

/* ---------- CTA band ---------- */

.cta-band {
  position: relative;
  border-top: 1px solid var(--color-steel);
  border-bottom: 1px solid var(--color-steel);
  overflow: hidden;
  isolation: isolate;
}

.cta-band__media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.cta-band__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
  filter: grayscale(1);
}

.cta-band__media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--color-carbon) 30%, rgba(11, 4, 5, 0.6));
}

.cta-band .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-32);
}

.cta-band h2 {
  font-size: var(--text-heading);
  line-height: 1.2;
  max-width: 640px;
}

.cta-band p {
  color: var(--color-slate);
  margin-top: var(--spacing-16);
}

@media (max-width: 760px) {
  .cta-band .container {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- Page header (posts, categories) ---------- */

.page-head {
  position: relative;
  padding: var(--spacing-64) 0 var(--spacing-48);
  border-bottom: 1px solid var(--color-steel);
  background-color: var(--color-carbon);
  background-image:
    linear-gradient(var(--color-graphite) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-graphite) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: -1px -1px;
}

.page-head::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--color-carbon) 35%, rgba(11, 4, 5, 0.6));
  pointer-events: none;
}

.page-head > .container {
  position: relative;
  z-index: 1;
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 var(--spacing-32);
  padding: 0;
  list-style: none;
  color: var(--color-slate);
}

.crumbs li + li::before {
  content: '/';
  margin-right: 8px;
  color: var(--color-steel);
}

.crumbs a {
  text-decoration: none;
}

.crumbs a:hover {
  color: var(--color-chalk);
}

.page-head h1 {
  max-width: 880px;
  font-size: var(--text-display);
  line-height: 1.1;
}

.page-head__lede {
  max-width: 640px;
  margin-top: var(--spacing-24);
  color: var(--color-slate);
}

.page-head__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: var(--spacing-24);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  margin-top: var(--spacing-40);
  border-top: 1px solid var(--color-steel);
  max-width: 880px;
}

.post-meta > div {
  padding: 16px 24px 0 0;
  margin-right: 24px;
  border-right: 1px solid var(--color-steel);
}

.post-meta > div:last-child {
  border-right: 0;
}

.post-meta dt {
  color: var(--color-slate);
}

.post-meta dd {
  margin: 4px 0 0;
  font-size: var(--text-body-sm);
}

@media (max-width: 560px) {
  .post-meta > div {
    border-right: 0;
    width: 50%;
    margin-right: 0;
  }
}

/* ---------- Article layout ---------- */

.article-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 80px;
  padding-top: var(--spacing-64);
  padding-bottom: var(--section-gap);
}

.toc {
  position: sticky;
  top: calc(var(--nav-height) + 32px);
  align-self: start;
  max-height: calc(100vh - var(--nav-height) - 64px);
  overflow-y: auto;
  scrollbar-width: thin;
}

.toc__title {
  color: var(--color-slate);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-steel);
}

.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc a {
  position: relative;
  display: flex;
  gap: 12px;
  padding: 10px 0 10px 14px;
  border-left: 1px solid var(--color-steel);
  color: var(--color-slate);
  font-size: var(--text-body-sm);
  line-height: 1.35;
  text-decoration: none;
}

.toc a:hover {
  color: var(--color-chalk);
}

.toc a .mono {
  flex-shrink: 0;
}

.toc a.is-active {
  color: var(--color-signal-red);
}

.toc a.is-active::before {
  content: '';
  position: absolute;
  left: -1px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-signal-red);
}

.toc__back {
  display: inline-flex;
  margin-top: var(--spacing-24);
}

@media (max-width: 1000px) {
  .article-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--spacing-32);
    padding-top: var(--spacing-40);
  }

  .toc {
    position: static;
    max-height: none;
    border: 1px solid var(--color-steel);
    border-radius: var(--radius);
    padding: 16px;
    background: var(--color-graphite);
  }

  .toc__back {
    display: none;
  }
}

/* ---------- Prose ---------- */

.prose {
  max-width: 760px;
  color: var(--color-prose);
  font-size: 17px;
  line-height: 1.7;
}

.prose > * + * {
  margin-top: 1.1em;
}

.prose h2 {
  position: relative;
  margin-top: 2.6em;
  padding-top: 24px;
  border-top: 1px solid var(--color-steel);
  color: var(--color-chalk);
  font-size: 28px;
  line-height: 1.2;
}

.prose h2::before {
  content: attr(data-index);
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-space-mono);
  font-size: var(--text-caption);
  letter-spacing: normal;
  color: var(--color-slate);
}

.prose > h2:first-child {
  margin-top: 0;
}

.prose h3 {
  margin-top: 2em;
  color: var(--color-chalk);
  font-size: 22px;
  line-height: 1.25;
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.prose h3::before {
  content: '';
  flex-shrink: 0;
  width: 7px;
  height: 7px;
  background: var(--color-chalk);
  transform: translateY(-3px);
}

.prose h4 {
  margin-top: 1.6em;
  color: var(--color-chalk);
  font-size: 18px;
}

.prose strong {
  color: var(--color-chalk);
  font-weight: 500;
}

.prose a {
  color: var(--color-chalk);
  text-decoration: underline;
  text-decoration-color: var(--color-slate);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.prose a:hover {
  text-decoration-color: var(--color-chalk);
}

.prose ul,
.prose ol {
  padding-left: 0;
  list-style: none;
}

.prose li {
  position: relative;
  padding-left: 24px;
}

.prose li + li {
  margin-top: 8px;
}

.prose ul li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--color-slate);
}

.prose figure {
  margin: 2em 0;
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-graphite);
}

.prose figure img {
  width: 100%;
}

.prose figcaption {
  padding: 10px 16px;
  border-top: 1px solid var(--color-steel);
  color: var(--color-slate);
  font-family: var(--font-space-mono);
  font-size: var(--text-caption);
  letter-spacing: normal;
  line-height: 1.5;
}

.prose > img {
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
}

.prose .embed {
  position: relative;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-graphite);
}

.prose .embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.author-box {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-top: var(--spacing-64);
  padding: var(--spacing-24);
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
  background: var(--color-graphite);
}

.author-box svg {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.author-box p {
  color: var(--color-slate);
  font-size: var(--text-body-sm);
}

.author-box strong {
  display: block;
  color: var(--color-chalk);
  font-weight: 500;
  font-size: var(--text-body);
}

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-16);
  margin-top: var(--spacing-24);
}

.pager a {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: var(--spacing-24);
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.15s ease;
}

.pager a:hover {
  border-color: var(--color-slate);
}

.pager a .mono {
  color: var(--color-slate);
}

.pager a:last-child {
  text-align: right;
}

.pager a:only-child {
  grid-column: 2;
}

@media (max-width: 560px) {
  .pager {
    grid-template-columns: 1fr;
  }

  .pager a:only-child {
    grid-column: auto;
  }
}

/* ---------- Listing tools ---------- */

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--spacing-24);
  margin-bottom: var(--spacing-32);
}

.toolbar .tabs {
  margin-bottom: 0;
  flex: 1;
}

.search {
  position: relative;
  width: 280px;
  flex-shrink: 0;
}

.search input {
  width: 100%;
  padding: 11px 14px 11px 40px;
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
  background: var(--color-graphite);
  color: var(--color-chalk);
  font-family: var(--font-archivo);
  font-size: var(--text-body-sm);
  letter-spacing: var(--tracking);
}

.search input::placeholder {
  color: var(--color-slate);
}

.search input:focus {
  outline: none;
  border-color: var(--color-slate);
}

.search svg {
  position: absolute;
  left: 14px;
  top: 50%;
  width: 16px;
  height: 16px;
  transform: translateY(-50%);
  color: var(--color-slate);
}

.empty-state {
  padding: var(--spacing-48);
  border: 1px dashed var(--color-steel);
  border-radius: var(--radius);
  text-align: center;
  color: var(--color-slate);
}

@media (max-width: 860px) {
  .toolbar {
    flex-direction: column-reverse;
    align-items: stretch;
  }

  .search {
    width: 100%;
  }
}

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

.site-footer {
  background: var(--color-carbon);
  border-top: 1px solid var(--color-steel);
  padding: var(--spacing-64) 0 var(--spacing-32);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: var(--spacing-48);
}

.footer-brand .brand {
  color: var(--color-chalk);
}

.footer-brand p {
  margin-top: var(--spacing-16);
  max-width: 320px;
  color: var(--color-slate);
  font-size: var(--text-body-sm);
}

.footer-col h2 {
  margin-bottom: var(--spacing-16);
  color: var(--color-slate);
  font-family: var(--font-space-mono);
  font-size: var(--text-caption);
  font-weight: 400;
  letter-spacing: normal;
  text-transform: uppercase;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col li + li {
  margin-top: 10px;
}

.footer-col a {
  color: var(--color-chalk);
  font-size: var(--text-body-sm);
  text-decoration: none;
}

.footer-col a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: var(--spacing-64);
  padding-top: var(--spacing-24);
  border-top: 1px solid var(--color-steel);
  color: var(--color-slate);
}

.footer-bottom a {
  text-decoration: none;
}

.footer-bottom a:hover {
  color: var(--color-chalk);
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

/* ---------- Simple pages / 404 ---------- */

.page-body {
  padding-top: var(--spacing-64);
  padding-bottom: var(--section-gap);
}

.page-body .prose {
  max-width: 720px;
}

.notfound {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
}

.notfound__code {
  color: var(--color-slate);
  margin-bottom: var(--spacing-24);
}

.notfound h1 {
  font-size: var(--text-display);
  line-height: 1.1;
}

.notfound p {
  margin-top: var(--spacing-16);
  color: var(--color-slate);
}

.notfound .hero__actions {
  margin-top: var(--spacing-32);
}

.credits {
  border: 1px solid var(--color-steel);
  border-radius: var(--radius);
  overflow: hidden;
}

.credits div {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-steel);
}

.credits div:last-child {
  border-bottom: 0;
}

.credits dt {
  color: var(--color-slate);
}

.credits dd {
  margin: 0;
  font-size: var(--text-body-sm);
}

@media (max-width: 560px) {
  .credits div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}