/* ==========================================================================
   Josh Thomas Design — site.css
   A "surveyor's plate" design system: hairline rules, mono spec-labels,
   coordinate marks. Built for the actual subject matter (aerial imagery,
   maps, precise product design) rather than a generic template look.
   ========================================================================== */

:root {
  /* color */
  --ink:        #12181F;
  --ink-soft:   #232E38;
  --paper:      #FFFFFF;
  --paper-alt:  #F1F4F3;
  --line:       #DCE3E1;
  --line-dark:  #37444C;
  --text:       #1F2A33;
  --text-mute:  #5B6B70;
  --text-on-ink: #E7ECEA;
  --text-on-ink-mute: #93A3A8;
  --teal:       #0F7C7A;
  --teal-deep:  #0A5F5E;
  --coral:      #FF6B4A;

  /* type */
  --font-display: 'Space Grotesk', 'Arial Narrow', sans-serif;
  --font-body: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Consolas, monospace;

  /* layout */
  --maxw: 1180px;
  --gutter: clamp(24px, 7vw, 72px);
  --radius: 2px;

  --header-h: 76px;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button { font: inherit; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; margin: 0 0 0.5em; letter-spacing: -0.01em; }
p { margin: 0 0 1.2em; }
p:last-child { margin-bottom: 0; }

:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

.container { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 1000;
  background: var(--ink); color: #fff; padding: 10px 16px;
  font-family: var(--font-mono); font-size: 13px; text-decoration: none;
  transition: top .15s ease;
}
.skip-link:focus { top: 12px; }

/* ---------- mono "spec label" utility (the signature detail) ---------- */
.tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.tag::before {
  content: '';
  width: 6px; height: 6px;
  border: 1px solid currentColor;
  transform: rotate(45deg);
  flex: none;
}
.tag--muted { color: var(--text-mute); }
.tag--on-ink { color: var(--teal); }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  height: var(--header-h);
  display: flex; align-items: center;
  transition: box-shadow .2s ease;
}
.site-header.is-scrolled { box-shadow: 0 4px 24px rgba(18,24,31,0.06); }
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%;
}
.brand {
  font-family: var(--font-display); font-weight: 700; font-size: 18px;
  letter-spacing: 0.02em; text-decoration: none; color: var(--ink);
  display: flex; flex-direction: column; line-height: 1.1;
}
.brand small {
  font-family: var(--font-mono); font-weight: 400; font-size: 10px;
  letter-spacing: 0.14em; color: var(--text-mute); text-transform: uppercase;
  margin-top: 3px;
}
.nav-primary { display: flex; align-items: center; gap: 2px; }
.nav-primary a {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.06em;
  text-transform: uppercase; text-decoration: none; color: var(--text);
  padding: 10px 16px; position: relative;
}
.nav-primary a::after {
  content: ''; position: absolute; left: 16px; right: 16px; bottom: 6px;
  height: 1px; background: var(--teal); transform: scaleX(0);
  transform-origin: left; transition: transform .18s ease;
}
.nav-primary a:hover::after, .nav-primary a[aria-current="page"]::after { transform: scaleX(1); }
.nav-primary a[aria-current="page"] { color: var(--teal); }

.nav-toggle {
  display: none;
  background: none; border: 1px solid var(--line-dark); border-radius: var(--radius);
  width: 42px; height: 42px; align-items: center; justify-content: center;
  cursor: pointer; color: var(--ink);
}
.nav-toggle svg { width: 20px; height: 20px; }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .nav-primary {
    position: fixed; inset: var(--header-h) 0 0 0; background: var(--ink);
    flex-direction: column; align-items: stretch; justify-content: flex-start;
    padding: 20px var(--gutter);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity .18s ease, transform .18s ease;
  }
  .nav-primary.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .nav-primary a { color: var(--text-on-ink); font-size: 15px; padding: 16px 4px; border-bottom: 1px solid var(--line-dark); }
  .nav-primary a::after { display: none; }
  .nav-primary a[aria-current="page"] { color: var(--teal); }
}

/* ---------- footer ---------- */
.site-footer {
  background: var(--ink); color: var(--text-on-ink);
  padding: 64px 0 28px;
  margin-top: 96px;
}
.site-footer--flush { margin-top: 0; }
.site-footer .container {
  display: flex; flex-wrap: wrap; gap: 32px; justify-content: space-between;
  align-items: flex-start;
}
.footer-brand { font-family: var(--font-display); font-size: 22px; font-weight: 700; }
.footer-coord { font-family: var(--font-mono); font-size: 12px; color: var(--text-on-ink-mute); margin-top: 8px; letter-spacing: 0.04em; }
.footer-links { display: flex; gap: 28px; flex-wrap: wrap; }
.footer-links a {
  font-family: var(--font-mono); font-size: 13px; text-decoration: none;
  color: var(--text-on-ink); letter-spacing: 0.04em; text-transform: uppercase;
  border-bottom: 1px solid transparent;
}
.footer-links a:hover { border-color: var(--teal); color: var(--teal); }
.footer-bottom {
  max-width: var(--maxw); margin: 40px auto 0; padding-inline: var(--gutter);
  padding-top: 20px; border-top: 1px solid var(--line-dark);
  font-family: var(--font-mono); font-size: 12px; color: var(--text-on-ink-mute);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}

/* ---------- hero (home) ---------- */
.hero {
  position: relative;
  padding: clamp(64px, 12vw, 140px) 0 clamp(56px, 8vw, 96px);
  background: var(--ink); color: var(--text-on-ink);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-dark) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.18;
  mask-image: radial-gradient(ellipse at 30% 20%, black, transparent 75%);
}
.hero .container { position: relative; }
.hero-eyebrow { margin-bottom: 22px; }
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  color: #fff;
  max-width: 16ch;
}
.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.4vw, 1.35rem);
  color: var(--teal);
  margin-top: 18px;
  min-height: 1.6em;
}
.hero-role .cursor { display: inline-block; width: 2px; height: 1em; background: var(--teal); margin-left: 2px; vertical-align: -2px; animation: blink 1s step-start infinite; }
@keyframes blink { 50% { opacity: 0; } }
.hero-lede { max-width: 700px; color: var(--text-on-ink-mute); font-size: 1.08rem; margin-top: 26px; }
.hero-actions { margin-top: 36px; display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.06em;
  text-transform: uppercase; text-decoration: none;
  padding: 14px 24px; border: 1px solid currentColor; border-radius: var(--radius);
  cursor: pointer; background: none; color: inherit;
  transition: background .15s ease, color .15s ease;
}
.btn--solid { background: var(--teal); border-color: var(--teal); color: #fff; }
.btn--solid:hover { background: var(--teal-deep); border-color: var(--teal-deep); }
.btn--ghost-light { color: var(--text-on-ink); }
.btn--ghost-light:hover { background: var(--text-on-ink); color: var(--ink); }
.btn--ghost { color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: #fff; }

/* ---------- section rhythm ---------- */
.section { padding: clamp(56px, 8vw, 96px) 0; }
.section + .section { padding-top: clamp(32px, 4vw, 48px); }
.section--alt { background: var(--paper-alt); }
.section-head { margin-bottom: 40px; max-width: 62ch; }
.section-head .tag { margin-bottom: 14px; }
.section-head h2 { font-size: clamp(1.6rem, 3.4vw, 2.2rem); }

/* ---------- page header (subpages) ---------- */
.page-header {
  background: var(--ink); color: var(--text-on-ink);
  padding: 56px 0 44px;
  position: relative; overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(var(--line-dark) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: 0.35;
  mask-image: linear-gradient(to bottom, black, transparent 90%);
}
.page-header .container { position: relative; }
.breadcrumb {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.05em;
  color: var(--text-on-ink-mute); margin-bottom: 16px; text-transform: uppercase;
}
.breadcrumb a { color: var(--text-on-ink-mute); text-decoration: none; }
.breadcrumb a:hover { color: var(--teal); }
.breadcrumb .sep { margin: 0 8px; opacity: .5; }
.page-header h1 { color: #fff; font-size: clamp(2rem, 5vw, 3rem); margin: 0; }
.page-header .lede { color: var(--text-on-ink-mute); max-width: 60ch; margin-top: 14px; font-family: var(--font-body); font-size: 1.05rem; }

/* ---------- testimonials ---------- */
.testimonial {
  border-left: 2px solid var(--teal);
  padding-left: 26px;
  max-width: 68ch;
}
.testimonial p { font-size: 1.15rem; color: var(--text); font-style: italic; }
.testimonial cite {
  display: block; margin-top: 14px; font-style: normal;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--text-mute);
}
.testimonial + .testimonial { margin-top: 40px; }

/* ---------- work grid ---------- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
@media (max-width: 940px) { .work-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .work-grid { grid-template-columns: 1fr; } }

.work-card {
  background: var(--paper);
  text-decoration: none; color: inherit;
  display: flex; flex-direction: column;
  position: relative;
  border: 1px solid var(--line);
}
.work-card:not(.work-card--soon) { cursor: pointer; }
.work-card-media { aspect-ratio: 4/3; overflow: hidden; background: var(--paper-alt); position: relative; }
.work-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.work-card:hover .work-card-media img { transform: scale(1.045); }
.work-card-media::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(18,24,31,0.55), transparent 45%);
  opacity: 0; transition: opacity .2s ease;
}
.work-card:hover .work-card-media::after { opacity: 1; }
.work-card-body { padding: 20px 22px 24px; border-top: 1px solid var(--line); flex: 1; display: flex; flex-direction: column; }
.work-card-index { font-family: var(--font-mono); font-size: 11px; color: var(--teal); letter-spacing: 0.08em; margin-bottom: 8px; }
.work-card h3 { font-size: 1.15rem; margin-bottom: 4px; }
.work-card-cat { font-family: var(--font-mono); font-size: 12px; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.04em; }
.work-card--soon .work-card-cat { color: var(--coral); }
.work-card--soon { cursor: default; pointer-events: none; user-select: none; opacity: 0.6; }
.work-card--soon .work-card-media img { filter: grayscale(1); }
.work-card-lock { display: inline-flex; align-items: center; gap: 6px; margin-top: 10px; font-family: var(--font-mono); font-size: 11px; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.06em; }
.work-card-lock svg { width: 12px; height: 12px; }

/* ---------- case study ---------- */
.case-intro-meta.case-block { margin: 0 0 44px; }

.case-body { padding-top: 8px; }
.section.case-body { padding-top: clamp(72px, 10vw, 112px); }
.case-block { margin: 0; }
.case-block + .case-block { margin-top: 44px; }
.case-block h2 { font-size: clamp(1.4rem, 3vw, 1.85rem); border-top: 1px solid var(--line); padding-top: 44px; }
.case-block h2:first-child { border-top: none; padding-top: 0; }
.case-block h3 { font-size: 1.2rem; margin-top: 6px; }
.case-block p { color: var(--text); font-size: 1.05rem; }
.case-block p strong { color: var(--ink); }
.case-block ul { list-style: none; margin: 20px 0 0; padding: 0; }
.case-block ul li {
  position: relative; padding-left: 24px; margin-bottom: 14px;
  font-size: 1.05rem; color: var(--text);
}
.case-block ul li:last-child { margin-bottom: 0; }
.case-block ul li::before {
  content: ''; position: absolute; left: 0; top: 0.6em;
  width: 6px; height: 6px; border: 1px solid var(--teal); transform: rotate(45deg);
}
.case-block ul li strong { color: var(--ink); }
.case-block blockquote {
  margin: 0; padding: 18px 24px; border-left: 2px solid var(--coral);
  background: var(--paper-alt); font-style: italic; font-size: 1.05rem;
}

.case-figure-wrap { margin: 44px 0; }
.case-figure-grid { display: grid; gap: 16px; }
.case-figure-grid[data-count="1"] { grid-template-columns: 1fr; }
.case-figure-grid[data-count="2"] { grid-template-columns: repeat(2, 1fr); }
.case-figure-grid[data-count="3"] { grid-template-columns: repeat(3, 1fr); }
.case-figure-grid[data-count="4"] { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 700px) { .case-figure-grid { grid-template-columns: 1fr !important; } }
figure.case-figure { margin: 0; }
.case-figure img { width: 100%; border: 1px solid var(--line); background: var(--paper-alt); }
.case-figure figcaption {
  font-family: var(--font-mono); font-size: 11.5px; color: var(--text-mute);
  margin-top: 8px; letter-spacing: 0.02em;
}

/* paginated one-at-a-time image carousel (replaces old scroll-strip) */
.case-carousel { margin: 44px 0; }
.case-carousel-stage { position: relative; }
.case-carousel-slide { margin: 0; }
.case-carousel-slide[hidden] { display: none; }
.case-carousel-slide img { width: 100%; border: 1px solid var(--line); background: var(--paper-alt); }
.case-carousel-controls {
  display: flex; align-items: center; gap: 16px;
  margin-top: 16px;
}
.case-carousel-btn {
  flex: none; width: 40px; height: 40px; border: 1px solid var(--line);
  background: var(--paper); border-radius: 50%; display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--ink); transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.case-carousel-btn:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.case-carousel-btn svg { width: 18px; height: 18px; }
.case-carousel-status {
  flex: 1; display: flex; justify-content: space-between; align-items: baseline;
  gap: 12px; flex-wrap: wrap; min-width: 0;
}
.case-carousel-caption {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-mute);
  letter-spacing: 0.02em;
}
.case-carousel-count { font-family: var(--font-mono); font-size: 12px; color: var(--text-mute); flex: none; }

.case-features {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 44px 0;
}
@media (max-width: 900px) { .case-features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 680px) { .case-features { grid-template-columns: 1fr; } }
.case-feature { background: var(--paper); padding: 26px 22px; border: 1px solid var(--line); }
.case-feature svg { width: 26px; height: 26px; color: var(--teal); margin-bottom: 14px; }
.case-feature h3 { font-size: 1rem; margin-bottom: 6px; }
.case-feature p { font-size: 0.92rem; color: var(--text-mute); font-family: var(--font-mono); line-height: 1.5; }



/* ---------- about ---------- */
.about-lede { font-size: 1.25rem; color: var(--ink); }
.about-body { }
.about-body p { font-size: 1.05rem; }
.skills-strip {
  display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px;
}
.skills-strip span {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.03em;
  padding: 7px 14px; border: 1px solid var(--line); border-radius: var(--radius);
  color: var(--text-mute);
}

/* ---------- about headings ---------- */
.about-heading { font-size: clamp(1.4rem, 3vw, 1.85rem); margin-bottom: 28px; }

/* ---------- process (about) ---------- */
.process-band { --band-pad: clamp(80px, 9.5vw, 108px); background: var(--ink); color: var(--text-on-ink); padding: var(--band-pad) 0 clamp(64px, 9vw, 104px); position: relative; }
.skills-section { --band-pad: clamp(44px, 6.2vw, 74px); padding-top: var(--band-pad); }
.skills-section > .container { position: relative; }
.process-band > .container { position: relative; }
.pf-marker {
  position: absolute; left: calc(var(--gutter) + 10px); top: calc(-1 * var(--band-pad));
  width: 14px; height: 14px; background: var(--teal);
  transform: translate(-50%, -50%) rotate(45deg);
}
.process-band .about-heading { color: #fff; margin-bottom: 14px; }
.process-intro { color: var(--text-on-ink-mute); font-size: 1.05rem; max-width: 62ch; margin-bottom: 56px; }
.pf { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(6, 1fr); column-gap: 20px; }
.pf-loop { grid-column: 4; grid-row: 1; position: relative; color: var(--teal); margin: 0 0 -4px 24px; width: calc(100% + 20px); }
.pf-loop svg { width: 100%; height: auto; overflow: visible; }
.pf-loop span {
  position: absolute; left: 50%; top: 0; transform: translate(-50%, -60%);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  background: var(--ink); padding: 0 8px; color: var(--teal);
}
.pf-step { grid-row: 2; position: relative; }
.pf-step::before {
  content: ''; position: absolute; top: 27px; left: 56px; right: -20px;
  height: 1px; background: var(--line-dark);
}
.pf-step:last-child::before { display: none; }
.pf-node {
  width: 56px; height: 56px; border-radius: 50%;
  border: 1px solid var(--teal); background: var(--ink); color: var(--teal);
  display: grid; place-items: center; position: relative; z-index: 1;
  transition: background .2s ease, color .2s ease;
}
.pf-node svg { width: 24px; height: 24px; }
.pf-step:hover .pf-node { background: var(--teal); color: #fff; }
.pf-title {
  font-family: var(--font-mono); font-weight: 500; font-size: 13px; letter-spacing: 0.08em;
  text-transform: uppercase; color: #fff; margin: 22px 0 10px;
}
.pf-summary { font-size: 0.98rem; color: var(--text-on-ink); margin-bottom: 16px; line-height: 1.5; }
.pf-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.pf-chips li {
  font-family: var(--font-mono); font-size: 11px; line-height: 1.3; letter-spacing: 0.02em;
  padding: 4px 8px; border: 1px solid var(--line-dark); border-radius: var(--radius);
  color: var(--text-on-ink-mute);
}
.pf-cycle {
  display: flex; align-items: center; gap: 10px; margin: 48px 0 0; padding-top: 24px;
  border-top: 1px solid var(--line-dark);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--teal);
}
.pf-cycle svg { width: 18px; height: 18px; flex: none; }
@media (max-width: 980px) {
  .pf { grid-template-columns: 1fr; row-gap: 0; }
  .pf-loop { display: none; }
  .pf-step { grid-row: auto; display: grid; grid-template-columns: 56px 1fr; column-gap: 22px; padding-bottom: 36px; }
  .pf-step::before { top: 56px; bottom: 0; left: 27px; right: auto; width: 1px; height: auto; }
  .pf-node { grid-row: 1 / span 3; }
  .pf-title { margin-top: 4px; }
  .pf-step:last-child { padding-bottom: 0; }
}

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: start; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; gap: 40px; } }
.field { margin-bottom: 20px; }
.field label {
  display: block; font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.05em; text-transform: uppercase; color: var(--text-mute);
  margin-bottom: 8px;
}
.field input, .field textarea {
  width: 100%; border: 1px solid var(--line); background: var(--paper-alt);
  padding: 13px 14px; font-family: var(--font-body); font-size: 1rem;
  color: var(--text); border-radius: var(--radius);
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--teal); background: var(--paper); }
.field textarea { min-height: 150px; resize: vertical; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 520px) { .field-row { grid-template-columns: 1fr; } }
.form-status { margin-top: 16px; font-family: var(--font-mono); font-size: 13px; }
.form-status[data-state="ok"] { color: var(--teal); }
.form-status[data-state="err"] { color: var(--coral); }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.contact-sidebar .tag { margin-bottom: 16px; }
.contact-sidebar h2 { font-size: 1.5rem; }
.contact-links { margin-top: 28px; display: flex; flex-direction: column; gap: 14px; }
.contact-links a {
  display: flex; align-items: center; gap: 12px; text-decoration: none;
  color: var(--text); font-family: var(--font-mono); font-size: 14px;
  border-bottom: 1px solid var(--line); padding-bottom: 14px;
}
.contact-links a:hover { color: var(--teal); }
.contact-links svg { width: 18px; height: 18px; color: var(--teal); flex: none; }

/* ---------- audio ---------- */
.audio-embed { border: 1px solid var(--line); }
.audio-embed iframe { display: block; width: 100%; }

/* ---------- 404 ---------- */
.error-page { min-height: 70vh; display: flex; align-items: center; }
.error-page .container { text-align: center; }
.error-code { font-family: var(--font-mono); font-size: clamp(3rem, 12vw, 7rem); color: var(--line); line-height: 1; }

/* ---------- back to top ---------- */
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 60;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--ink); color: #fff; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transform: translateY(8px);
  transition: opacity .2s ease, transform .2s ease;
}
.to-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.to-top svg { width: 18px; height: 18px; }

/* ---------- misc ---------- */
.divider { border: none; border-top: 1px solid var(--line); margin: 0; }
::selection { background: var(--teal); color: #fff; }