/* ============================================================
   SmartCone Technologies Inc. — design tokens
   Brand system: Gunmetal / Steel / Titanium / Aluminum (grey),
   Hazard (orange) as functional accent, Siren (red) reserved
   for emphasis. Grey is the dominant register.
   ============================================================ */

:root {
  /* Brand colour */
  --gunmetal: #475c72;
  --gunmetal-ink: #2d3947;   /* darkened gunmetal for high-contrast text */
  --steel: #828c9d;
  --titanium: #b7bbc6;
  --aluminum: #e1e2e6;
  --hazard: #f15a22;
  --hazard-ink: #a83814;    /* darker hazard for text/UI use — passes WCAG AA on both white and Aluminum, unlike pure Hazard */
  --siren: #d71920;
  --white: #ffffff;

  /* Semantic roles */
  --color-bg: var(--white);
  --color-bg-band: var(--aluminum);
  --color-bg-dark: var(--gunmetal-ink);
  --color-text: var(--gunmetal-ink);
  --color-text-muted: var(--gunmetal); /* Steel itself fails WCAG AA for body-size text; Gunmetal keeps the muted role while passing 4.5:1 on white and Aluminum */
  --color-text-on-dark: var(--aluminum);
  --color-border: var(--titanium);
  --color-accent: var(--hazard);
  --color-accent-ink: var(--hazard-ink);
  --color-alert: var(--siren);

  /* Type — system geometric-sans stack approximating Avenir.
     TODO: swap to licensed Avenir Black (display) / Avenir Medium (body) when supplied. */
  --font-display: "Avenir Next", "Avenir", "Century Gothic", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-body: "Avenir Next", "Avenir", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  /* Type scale */
  --fs-h1: clamp(2.25rem, 1.6rem + 3vw, 3.75rem);
  --fs-h2: clamp(1.6rem, 1.35rem + 1.2vw, 2.25rem);
  --fs-h3: clamp(1.05rem, 0.98rem + 0.3vw, 1.2rem);
  --fs-lede: clamp(1.05rem, 0.98rem + 0.3vw, 1.25rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;

  /* Spacing */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;

  /* Layout */
  --container-max: 80rem;
  --container-narrow: 52rem;
  --radius: 2px;
  --border-width: 1px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 200ms;
}

/* ============================================================
   Reset
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
}

h1, h2, h3, p, dl, dd, figure, table {
  margin: 0;
}

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

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

a {
  color: inherit;
}

table {
  border-collapse: collapse;
}

/* ============================================================
   Base
   ============================================================ */

body {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  color: var(--gunmetal-ink);
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p + p {
  margin-top: var(--space-2);
}

/* Visible keyboard focus everywhere */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: var(--white);
  padding: var(--space-1) var(--space-2);
  z-index: 100;
  font-family: var(--font-display);
  font-weight: 700;
  text-decoration: none;
}

.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   Layout
   ============================================================ */

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-block: var(--space-6);
}

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

.section--dark {
  background: var(--color-bg-dark);
  color: var(--color-text-on-dark);
}

.section--dark h2 {
  color: var(--white);
}

.section-intro {
  max-width: 46rem;
  font-size: var(--fs-lede);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
  margin-bottom: var(--space-4);
}

.section-intro--dark {
  color: var(--titanium);
}

.section > .container > h2,
.section > .container > .container h2 {
  margin-bottom: 0;
}

#about h2,
#platform h2,
#hardware h2,
#applications h2,
#deployments h2,
#contact h2 {
  margin-bottom: var(--space-2);
}

#about p {
  color: var(--color-text);
  max-width: 42rem;
}

#about p + p {
  margin-top: var(--space-2);
}

/* ============================================================
   Header / nav
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--white);
  border-bottom: var(--border-width) solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-block: var(--space-2);
  gap: var(--space-2) var(--space-3);
}

.wordmark {
  display: flex;
  align-items: center;
  text-decoration: none;
  line-height: 1.1;
}

.wordmark__logo {
  display: block;
  height: 2.5rem;
  width: auto;
}

.site-nav__panel ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-4);
}

.site-nav__panel a {
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-text);
  padding-block: 0.25rem;
  border-bottom: 2px solid transparent;
  transition: border-color var(--duration) var(--ease), color var(--duration) var(--ease);
}

.site-nav__panel a:hover {
  color: var(--color-accent-ink);
  border-bottom-color: var(--color-accent-ink);
}

.site-nav__cta {
  background: var(--color-accent-ink);
  color: var(--white) !important;
  padding: 0.5rem 1rem !important;
  border-radius: var(--radius);
  border-bottom-color: transparent !important;
}

.site-nav__cta:hover {
  background: var(--gunmetal-ink);
  color: var(--white) !important;
}

/* ============================================================
   Hero
   ============================================================ */

.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(155deg, var(--gunmetal-ink) 0%, var(--gunmetal) 62%, var(--steel) 100%);
  color: var(--white);
  clip-path: polygon(0 0, 100% 0, 100% 94%, 0 100%);
}

.hero__rings {
  position: absolute;
  top: 50%;
  right: -8%;
  transform: translateY(-50%);
  width: min(46vw, 620px);
  height: min(46vw, 620px);
  opacity: 0.5;
  pointer-events: none;
}

.hero__rings .ring {
  fill: none;
  stroke: var(--titanium);
  stroke-width: 1;
  opacity: 0.5;
}

.hero__rings .ring--1 { opacity: 0.7; }

.hero__rings .sweep {
  stroke: var(--hazard);
  stroke-width: 2;
  transform-origin: 300px 300px;
  animation: sweep 6s linear infinite;
}

@keyframes sweep {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero__inner {
  position: relative;
  padding-block: var(--space-6) calc(var(--space-6) + var(--space-3));
  max-width: 40rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--titanium);
  margin-bottom: var(--space-2);
}

.hero h1 {
  color: var(--white);
  margin-bottom: var(--space-3);
}

.hero__lede {
  font-size: var(--fs-lede);
  color: var(--titanium);
  max-width: 34rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius);
  border: var(--border-width) solid transparent;
  transition: background var(--duration) var(--ease), border-color var(--duration) var(--ease), color var(--duration) var(--ease);
}

.btn--primary {
  background: var(--color-accent-ink);
  color: var(--white);
}

.btn--primary:hover {
  background: var(--gunmetal-ink);
}

.btn--ghost {
  background: transparent;
  color: var(--white);
  border-color: var(--titanium);
}

.btn--ghost:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

/* ============================================================
   Patent anchor
   ============================================================ */

.patent-anchor {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-2);
  margin-top: var(--space-4);
  padding: var(--space-3);
  border: var(--border-width) solid var(--color-border);
  border-left: 4px solid var(--color-accent-ink);
  background: var(--color-bg-band);
}

.patent-anchor__label {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.patent-anchor__number {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--gunmetal-ink);
}

.patent-anchor__detail {
  flex-basis: 100%;
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}

/* ============================================================
   Card grids (platform, hardware, applications)
   ============================================================ */

.card-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, 1fr);
}

.card-grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.card-grid--5 {
  grid-template-columns: repeat(3, 1fr);
}

/* 2026-07-11: fluid variant for grids whose item count doesn't divide evenly
   into the fixed column count above (e.g. 5 items in a 3-column grid leaves
   an empty cell in the last row — more visible now that containers are wider).
   Auto-fit lets the row size to however many items actually fit, so there's
   no leftover gap. Opt-in via an extra class so it doesn't affect grids
   (like the 6-item sensor list on platform.html) that already divide evenly. */
.card-grid--fluid {
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
}

.card-grid--split {
  grid-template-columns: 1fr 1.3fr;
  align-items: center;
}

.card-grid--split .photo-frame,
.card-grid--split .photo-placeholder {
  aspect-ratio: 4 / 3;
  margin-bottom: 0;
}

/* 2026-07-11: at the new 80rem container width the split layout's text
   column runs ~45rem wide — too long a line length for 2-3 sentence
   paragraphs, and it made the copy look sparse against the photo. Cap it. */
.card-grid--split > div:last-child p {
  max-width: 34rem;
}

@media (max-width: 720px) {
  .card-grid--split {
    grid-template-columns: 1fr;
  }
}

/* 2026-07-11: two-photo gallery for a product section that has a primary
   shot plus a supporting detail/context shot (currently TheSmartCone on
   products.html). Replaces a second image that was previously appended
   below the split layout with no visual relationship to it. */
.photo-duo {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--space-2);
  align-items: start;
}

.photo-duo .photo-frame {
  margin-bottom: 0;
}

.card-grid--split .photo-duo .photo-duo__primary {
  aspect-ratio: 4 / 3;
}

.card-grid--split .photo-duo .photo-duo__secondary {
  aspect-ratio: 3 / 4;
  max-width: none;
}

@media (max-width: 480px) {
  .photo-duo {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--white);
  border: var(--border-width) solid var(--color-border);
  border-top: 3px solid var(--gunmetal);
  padding: var(--space-3);
}

.section--band .card {
  background: var(--white);
}

.card h3 {
  margin-bottom: var(--space-1);
}

.card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.card--hardware {
  border-top-color: var(--color-accent);
}

.photo-frame {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: var(--border-width) solid var(--color-border);
  margin-bottom: var(--space-2);
  background: var(--aluminum);
}

.photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.photo-frame--portrait {
  max-width: 22rem;
  aspect-ratio: 4 / 5;
}

.photo-placeholder {
  aspect-ratio: 4 / 3;
  background: repeating-linear-gradient(
    135deg,
    var(--aluminum),
    var(--aluminum) 10px,
    var(--titanium) 10px,
    var(--titanium) 11px
  );
  border: 1px dashed var(--steel);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin-bottom: var(--space-2);
}

.photo-placeholder span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--gunmetal-ink);
  background: var(--white);
  padding: 0.3rem 0.6rem;
  border: var(--border-width) solid var(--color-border);
}

.placeholder-text {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-accent-ink);
}

/* ============================================================
   Interior page hero (shorter variant of .hero, reused per page)
   ============================================================ */

.page-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(155deg, var(--gunmetal-ink) 0%, var(--gunmetal) 62%, var(--steel) 100%);
  color: var(--white);
  clip-path: polygon(0 0, 100% 0, 100% 96%, 0 100%);
}

.page-hero__rings {
  position: absolute;
  top: 50%;
  right: -12%;
  transform: translateY(-50%);
  width: min(30vw, 380px);
  height: min(30vw, 380px);
  opacity: 0.35;
  pointer-events: none;
}

.page-hero__rings .ring {
  fill: none;
  stroke: var(--titanium);
  stroke-width: 1;
  opacity: 0.5;
}

.page-hero__rings .sweep {
  stroke: var(--hazard);
  stroke-width: 2;
  transform-origin: 300px 300px;
  animation: sweep 6s linear infinite;
}

.page-hero__inner {
  position: relative;
  padding-block: var(--space-5) calc(var(--space-5) + var(--space-2));
  max-width: 40rem;
}

.page-hero h1 {
  color: var(--white);
  margin-bottom: var(--space-2);
}

.page-hero__lede {
  font-size: var(--fs-lede);
  color: var(--titanium);
  max-width: 34rem;
}

/* ============================================================
   Nav current-page state
   ============================================================ */

.site-nav__panel a[aria-current="page"] {
  color: var(--color-accent-ink);
  border-bottom-color: var(--color-accent-ink);
}

/* ============================================================
   Stat row
   ============================================================ */

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-3);
  margin: var(--space-4) 0;
}

.stat-tile {
  border-top: 3px solid var(--color-accent-ink);
  padding-top: var(--space-1);
}

.stat-tile__number {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 2rem;
  line-height: 1.1;
  color: var(--gunmetal-ink);
}

.stat-tile__label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ============================================================
   Timeline
   ============================================================ */

.timeline {
  position: relative;
  margin: var(--space-4) 0;
  padding-left: 2rem;
  border-left: 2px solid var(--titanium);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-3);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -2.4rem;
  top: 0.35rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent-ink);
}

.timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--color-accent-ink);
  margin-bottom: 0.25rem;
}

.timeline__item h3 {
  margin-bottom: var(--space-1);
}

.timeline__item p {
  color: var(--color-text-muted);
}

.timeline__entry + .timeline__entry {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: var(--border-width) solid var(--color-border);
}

/* ============================================================
   Architecture diagram (CSS box diagram, no images)
   ============================================================ */

.arch-diagram {
  margin: var(--space-4) 0;
  /* 2026-07-11: cap width so boxes don't balloon at the 80rem container —
     short labels in very wide boxes read as sparse. */
  max-width: 64rem;
}

.arch-diagram__row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
}

.arch-diagram__connector {
  text-align: center;
  font-family: var(--font-mono);
  color: var(--steel);
  font-size: 1.1rem;
  padding: 0.35rem 0;
}

.arch-box {
  border: var(--border-width) solid var(--color-border);
  border-top: 3px solid var(--gunmetal);
  background: var(--white);
  padding: var(--space-2);
  text-align: center;
}

.arch-box--accent {
  border-top-color: var(--color-accent);
}

.arch-box h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--gunmetal-ink);
  margin-bottom: 0.25rem;
}

.arch-box p {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

@media (max-width: 720px) {
  .arch-diagram__row {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   Case studies (deployments detail page)
   ============================================================ */

.case-study {
  padding-block: var(--space-4);
  border-bottom: var(--border-width) solid var(--color-border);
}

.case-study:last-child {
  border-bottom: none;
}

.case-study__eyebrow {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  color: var(--color-accent-ink);
}

.case-study h3 {
  margin-top: 0.35rem;
  margin-bottom: var(--space-2);
  max-width: 40rem;
}

.case-study p {
  max-width: 42rem;
  color: var(--color-text);
}

.case-study p + p {
  margin-top: var(--space-2);
}

.case-study__photo {
  max-width: 22rem;
  margin-block: var(--space-2) var(--space-3);
}

.case-study__logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.case-study__logo {
  display: block;
  height: 2.25rem;
  width: auto;
}

.logo-placeholder {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  height: 2.75rem;
  padding: 0.3rem var(--space-2);
  background: var(--aluminum);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius);
}

.logo-placeholder__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.8rem;
  line-height: 1.2;
  color: var(--gunmetal-ink);
  white-space: nowrap;
}

.logo-placeholder__note {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* ============================================================
   Logo carousel — CSS-only marquee, no JS. Duplicates the logo
   set once so the loop tiles seamlessly; pauses to a static
   wrapped row under prefers-reduced-motion.
   ============================================================ */

.logo-carousel {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
}

.logo-carousel__track {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  width: max-content;
  animation: logo-scroll 32s linear infinite;
}

.logo-carousel:hover .logo-carousel__track {
  animation-play-state: paused;
}

.logo-carousel__dupe {
  display: contents;
}

.logo-carousel__track img {
  height: 2.75rem;
  width: auto;
  max-width: 10rem;
  object-fit: contain;
  flex-shrink: 0;
  filter: grayscale(1);
  opacity: 0.75;
  transition: filter var(--duration) var(--ease), opacity var(--duration) var(--ease);
}

.logo-carousel__track img:hover {
  filter: none;
  opacity: 1;
}

@keyframes logo-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@media (prefers-reduced-motion: reduce) {
  .logo-carousel__track {
    animation: none;
    flex-wrap: wrap;
    width: auto;
  }

  .logo-carousel__track .logo-carousel__dupe {
    display: none;
  }
}

.case-study--compact h3 {
  font-size: 1.05rem;
}

/* ============================================================
   Footer nav
   ============================================================ */

.site-footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.site-footer__nav a {
  color: var(--titanium);
  text-decoration: none;
  font-size: var(--fs-small);
}

.site-footer__nav a:hover {
  color: var(--white);
}

/* ============================================================
   PCB texture bands — decorative, ties "designed & built in-house"
   claim to real board renderings. Muted to brand grey; source
   renderings are green/red, outside the brand palette, so the
   colour is stripped and a gunmetal overlay applied.
   ============================================================ */

.pcb-band {
  height: 96px;
  background-size: cover;
  background-position: center 35%;
  filter: grayscale(1);
}

.pcb-band--backplane {
  background-image:
    linear-gradient(180deg, rgba(45, 57, 71, 0.9), rgba(45, 57, 71, 0.82)),
    url("assets/smart_cone_backplane_rendering_4.jpg");
}

.pcb-band--power {
  background-image:
    linear-gradient(180deg, rgba(71, 92, 114, 0.9), rgba(71, 92, 114, 0.82)),
    url("assets/smart_cone_power_supply_rendering_1.jpg");
}

@media (max-width: 720px) {
  .pcb-band {
    height: 56px;
  }
}

/* ============================================================
   Field installation photos (applications section)
   ============================================================ */

.field-photos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  max-width: 46rem;
}

.field-photos img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: var(--border-width) solid var(--color-border);
  display: block;
}

/* ============================================================
   Contact
   ============================================================ */

.contact-list {
  margin-top: var(--space-4);
  border-top: var(--border-width) solid var(--steel);
}

.contact-list__row {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: var(--space-3);
  padding-block: var(--space-2);
  border-bottom: var(--border-width) solid var(--steel);
}

.contact-list__row dt {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--titanium);
}

.contact-list__row dd {
  margin: 0;
}

.contact-list__row a {
  color: var(--white);
  text-decoration-color: var(--color-accent);
  text-underline-offset: 3px;
}

.contact-list__row a:hover {
  color: var(--titanium);
}

.contact-list--light {
  border-top-color: var(--color-border);
}

.contact-list--light .contact-list__row {
  border-bottom-color: var(--color-border);
}

.contact-list--light .contact-list__row dt {
  color: var(--color-text-muted);
}

.contact-list--light .contact-list__row dd {
  color: var(--color-text);
}

.contact-list--light .contact-list__row a {
  color: var(--gunmetal-ink);
}

.contact-list--light .contact-list__row a:hover {
  color: var(--color-accent-ink);
}

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
  background: var(--gunmetal-ink);
  color: var(--titanium);
  padding-block: var(--space-3);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  font-size: var(--fs-small);
}

.site-footer__patent {
  font-family: var(--font-mono);
  /* 2026-07-11: was --steel (~3.5:1 on the gunmetal-ink footer background,
     fails WCAG AA's 4.5:1 for normal text). Inherit the footer's own
     --titanium (~6.1:1, already proven elsewhere in the footer) instead
     of overriding it — same bug class as the .page-hero h1 fix: don't
     assume a color passes on a dark background without checking. */
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 900px) {
  .card-grid--4,
  .card-grid--5 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .site-header__inner {
    justify-content: flex-start;
  }

  .site-nav__panel {
    width: 100%;
  }

  .site-nav__panel ul {
    width: 100%;
    gap: var(--space-1) var(--space-3);
  }

  .card-grid,
  .card-grid--4,
  .card-grid--5 {
    grid-template-columns: 1fr;
  }

  .hero__rings {
    width: 70vw;
    height: 70vw;
    right: -20%;
    opacity: 0.35;
  }

  .contact-list__row {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }
}

@media (max-width: 400px) {
  .section {
    padding-block: var(--space-5);
  }
}

/* ============================================================
   Motion preference
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .hero__rings .sweep {
    animation: none;
  }
}