/* =============================================================
   CLOSING SECTIONS — proof, stack + GitHub, contact, footer.
   ============================================================= */

/* Shared sub-heading inside a section ("Analytics", "Certifications",
   "GitHub activity"): quieter than the section title, above the
   body copy. */
.proof-heading {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 600;
  letter-spacing: var(--track-display);
}

.text-link {
  display: inline-flex;
  min-height: var(--tap);
  align-items: center;
  gap: var(--s-1);
  color: var(--text-mid);
  font-size: var(--fs-small);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 0.25em;
  transition: color var(--dur-1) var(--ease-out);
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--accent);
}

/* ---- Proof -------------------------------------------------------- */

.proof-block + .proof-block {
  margin-top: var(--s-9);
}

.proof-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-2) var(--s-6);
  margin-bottom: var(--s-5);
}

.proof-intro {
  max-width: 34em;
  margin: 0;
  color: var(--text-mid);
  font-size: var(--fs-body);
}

/* Analytics carousel.
   Base layout (no JS): a swipeable, snapping row of screenshots.
   With js/interactions.js it becomes a 3D coverflow (.is-3d): the
   active screenshot flat and large in the middle, its neighbours
   angled back on either side. JS sets --offset (slides from the
   active one) and --abs on each slide; the drawing is all here. */

.section-proof {
  /* The angled side cards run past the page edges on purpose. */
  overflow-x: clip;
}

.proof-carousel {
  /* As wide as the page allows (up to 1280px), but never so tall
     that the screenshot and its caption overflow the screen: the
     last term converts the spare viewport height into a width at
     the screenshots' 1400:713 ratio. */
  --slide-w: min(90vw, 80rem, (100svh - 15rem) * 1.9635);
}

.proof-track {
  display: flex;
  gap: var(--s-5);
  overflow-x: auto;
  padding-bottom: var(--s-3);
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.proof-slide {
  flex: 0 0 var(--slide-w);
  scroll-snap-align: center;
}

.proof-card {
  display: block;
  width: 100%;
  cursor: zoom-in;
}

.proof-shot {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  aspect-ratio: 1874 / 954;
  background: var(--ink-800);
}

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

.proof-caption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-1) var(--s-5);
  padding-top: var(--s-4);
}

.proof-value {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 600;
  line-height: 1;
  letter-spacing: var(--track-display);
}

.proof-label {
  color: var(--text-mid);
  font-size: var(--fs-body);
}

.proof-controls {
  display: none;
  align-items: center;
  justify-content: center;
  gap: var(--s-5);
  margin-top: var(--s-6);
}

.proof-arrow {
  display: grid;
  width: 3rem;
  height: 3rem;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-cursor);
  color: var(--text);
  transition: border-color var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}

.proof-arrow svg {
  width: 1.1rem;
  height: 1.1rem;
}

.proof-arrow:hover,
.proof-arrow:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.proof-count {
  display: flex;
  gap: var(--s-2);
  min-width: 4.5rem;
  justify-content: center;
  color: var(--text-mid);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--track-label);
  font-variant-numeric: tabular-nums;
}

.proof-current {
  color: var(--text);
}

.proof-total::before {
  margin-right: var(--s-2);
  content: "/";
}

/* ---- 3D coverflow ---- */

.proof-carousel.is-3d .proof-controls {
  display: flex;
}

.proof-carousel.is-3d .proof-track {
  position: relative;
  display: block;
  height: var(--track-h, 32rem);
  overflow: visible;
  padding: 0;
  perspective: 1800px;
  touch-action: pan-y;
  user-select: none;
}

.proof-carousel.is-3d .proof-slide {
  --offset: 0;
  --abs: 0;

  position: absolute;
  top: 0;
  left: 50%;
  width: var(--slide-w);
  transform:
    translateX(-50%)
    translateX(calc(var(--offset) * 54%))
    translateZ(calc(var(--abs) * -240px))
    rotateY(calc(var(--offset) * -34deg));
  transform-style: preserve-3d;
  z-index: calc(10 - var(--abs));
  transition: transform 0.75s var(--ease-out), opacity 0.5s var(--ease-out);
}

.proof-carousel.is-3d .proof-slide.is-far {
  opacity: 0;
  pointer-events: none;
}

/* Side cards sit in shadow and show no caption; only the active one
   is read in full. */
.proof-carousel.is-3d .proof-shot::after {
  position: absolute;
  inset: 0;
  background: var(--ink-900);
  opacity: calc(var(--abs) * 0.45);
  pointer-events: none;
  transition: opacity 0.5s var(--ease-out);
  content: "";
}

.proof-carousel.is-3d .proof-caption {
  opacity: 0;
  transition: opacity var(--dur-2) var(--ease-out);
}

.proof-carousel.is-3d .is-active .proof-caption {
  opacity: 1;
}

.proof-carousel.is-3d .proof-slide:not(.is-active) .proof-card {
  cursor: pointer;
}

.proof-carousel.is-3d .is-active .proof-card:hover .proof-shot,
.proof-carousel.is-3d .is-active .proof-card:focus-visible .proof-shot {
  border-color: var(--accent);
}

@media (prefers-reduced-motion: reduce) {
  .proof-carousel.is-3d .proof-slide,
  .proof-carousel.is-3d .proof-shot::after {
    transition: none;
  }
}

/* Certificates: tilt toward the cursor with a soft green sheen that
   follows it. --rx/--ry/--mx/--my are set by js/interactions.js;
   the defaults leave the card flat and the sheen off. */
.cert-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-6) var(--s-5);
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 700px) {
  .cert-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.cert-card {
  --rx: 0deg;
  --ry: 0deg;
  --mx: 50%;
  --my: 50%;

  display: flex;
  width: 100%;
  flex-direction: column;
  gap: var(--s-2);
  text-align: left;
}

.cert-media {
  position: relative;
  display: grid;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  padding: var(--s-4);
  place-items: center;
  border: 1px solid var(--line);
  background: var(--ink-850);
  transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry));
  transition: transform var(--dur-2) var(--ease-out), border-color var(--dur-1) var(--ease-out);
}

.cert-media img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}

.cert-media::after {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mx) var(--my), var(--accent-wash), transparent 55%);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-2) var(--ease-out);
  content: "";
}

/* While tracking, the transform follows the cursor directly. */
.cert-card.is-tilting .cert-media {
  transition: border-color var(--dur-1) var(--ease-out);
}

.cert-card:hover .cert-media,
.cert-card:focus-visible .cert-media {
  border-color: var(--line-strong);
}

.cert-card:hover .cert-media::after {
  opacity: 1;
}

.cert-title {
  margin-top: var(--s-2);
  font-size: var(--fs-body);
  font-weight: 500;
  transition: color var(--dur-1) var(--ease-out);
}

.cert-card:hover .cert-title,
.cert-card:focus-visible .cert-title {
  color: var(--accent);
}

.cert-meta {
  display: flex;
  gap: var(--s-2);
  color: var(--text-mid);
  font-size: var(--fs-small);
}

.cert-meta span + span::before {
  margin-right: var(--s-2);
  content: "\00B7";
}

/* ---- Lightbox ------------------------------------------------------ */

.lightbox {
  width: min(92vw, 1400px);
  max-width: none;
  max-height: 92svh;
  margin: auto;
  padding: 0;
  overflow: visible;
  border: 0;
  background: transparent;
}

.lightbox::backdrop {
  background: rgba(10, 10, 10, 0.92);
}

.lightbox img {
  display: block;
  width: 100%;
  max-height: 88svh;
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: calc(var(--s-6) * -1 - var(--s-3));
  right: 0;
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  color: var(--text);
  transition: color var(--dur-1) var(--ease-out);
}

.lightbox-close svg {
  width: 1.25rem;
  height: 1.25rem;
}

.lightbox-close:hover,
.lightbox-close:focus-visible {
  color: var(--accent);
}

/* ---- Stack ---------------------------------------------------------- */

.stack-groups {
  margin: 0;
  border-bottom: 1px solid var(--line);
}

.stack-group {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-3);
  padding-block: var(--s-5);
  border-top: 1px solid var(--line);
}

.stack-group dt {
  color: var(--text-mid);
  font-size: var(--fs-body);
}

.stack-group dd {
  margin: 0;
}

.stack-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.stack-pills li {
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  font-size: var(--fs-small);
  transition: border-color var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}

.stack-pills li:hover {
  border-color: var(--accent);
  color: var(--accent);
}

@media (min-width: 768px) {
  .stack-group {
    grid-template-columns: minmax(10rem, 16rem) minmax(0, 1fr);
    align-items: center;
    gap: var(--s-6);
  }
}

/* Logos: always in their own colours. Single-colour (mono) logos
   are black in the source files, so they are drawn white.
   Hover is a small three-part reaction:
   1. pop    the logo hops, squashes and wobbles back (keyframes)
   2. magnet the icon leans toward the cursor (js/interactions.js
             sets --tx/--ty/--tilt on the tile)
   3. glow   the tile lights up in the logo's brand colour (--brand),
             centred on the cursor (--gx/--gy)
   Reduced motion keeps only the glow. */
.stack-logos {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.stack-logo {
  --brand: var(--accent);
  --tx: 0px;
  --ty: 0px;
  --tilt: 0deg;
  --gx: 50%;
  --gy: 60%;

  position: relative;
  display: flex;
  width: 6.25rem;
  flex-direction: column;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-4) var(--s-2) var(--s-3);
  /* No overflow clipping: the logo is allowed to hop out of its tile. */
  border: 1px solid var(--line);
  color: var(--text-mid);
  font-size: var(--fs-small);
  text-align: center;
  transition: border-color var(--dur-2) var(--ease-out), color var(--dur-2) var(--ease-out);
}

.stack-logo::before {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at var(--gx) var(--gy),
    color-mix(in srgb, var(--brand) 30%, transparent),
    transparent 62%
  );
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-2) var(--ease-out);
  content: "";
}

.stack-logo-icon {
  position: relative;
  z-index: 1;
  display: block;
  transform: translate(var(--tx), var(--ty)) rotate(var(--tilt));
  transition: transform 0.35s var(--ease-out);
}

.stack-logo img {
  display: block;
  width: 2.5rem;
  height: 2.5rem;
  object-fit: contain;
  transform-origin: 50% 100%;
}

.stack-logo.is-mono img {
  filter: brightness(0) invert(0.94);
}

.stack-logo-name {
  position: relative;
  transition: color var(--dur-2) var(--ease-out);
}

.stack-logo:hover {
  border-color: color-mix(in srgb, var(--brand) 55%, transparent);
  color: var(--text);
}

.stack-logo:hover::before {
  opacity: 1;
}

.stack-logo:hover img {
  animation: logo-pop 0.75s var(--ease-out);
  filter: drop-shadow(0 6px 14px color-mix(in srgb, var(--brand) 45%, transparent));
}

.stack-logo.is-mono:hover img {
  filter: brightness(0) invert(1) drop-shadow(0 6px 14px rgba(255, 255, 255, 0.25));
}

/* Hop, squash on landing, small wobble, settle. */
@keyframes logo-pop {
  0% {
    transform: translateY(0) scale(1, 1) rotate(0deg);
  }
  28% {
    transform: translateY(-11px) scale(1.12, 1.12) rotate(-9deg);
  }
  50% {
    transform: translateY(0) scale(1.14, 0.86) rotate(0deg);
  }
  68% {
    transform: translateY(-4px) scale(0.96, 1.05) rotate(5deg);
  }
  84% {
    transform: translateY(0) scale(1.02, 0.98) rotate(-2deg);
  }
  100% {
    transform: translateY(0) scale(1, 1) rotate(0deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .stack-logo:hover img {
    animation: none;
  }

  .stack-logo-icon {
    transform: none;
  }
}

/* Phones: each tile becomes a compact icon + name pill, and they
   wrap with an even gap. The hover effects are pointer-only, so
   nothing is lost on touch. */
@media (max-width: 767px) {
  .stack-logo {
    width: auto;
    flex-direction: row;
    gap: var(--s-2);
    padding: 0.4rem 0.85rem 0.4rem 0.5rem;
    border-radius: var(--r-pill);
    color: var(--text);
    text-align: left;
  }

  .stack-logo img {
    width: 1.375rem;
    height: 1.375rem;
  }

  .stack-logo::before {
    border-radius: inherit;
  }
}

.stack-logos + .stack-pills {
  margin-top: var(--s-3);
}

/* ---- GitHub activity --------------------------------------------------
   A strip of timeline rather than a plain heatmap: a month ruler with
   tick marks over the weeks, Mon / Wed / Fri down the side, squares
   that fill in column by column, and a green playhead that runs down
   the hovered week with the day's count above it. All drawn by
   js/interactions.js from the snapshot.
---------------------------------------------------------------- */

.github {
  margin-top: var(--s-9);
}

.github-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--s-2) var(--s-6);
  margin-bottom: var(--s-5);
}

/* The card. A faint green glow rises from the top-right corner, the
   only colour besides the squares themselves. */
.github-scroll {
  --cell: clamp(10px, 0.5rem + 0.4vw, 15px);
  --gap: 3px;
  --day-col: 2.25rem;

  position: relative;
  overflow: hidden;
  padding: clamp(1.25rem, 0.9rem + 1.4vw, 2.25rem);
  border: 1px solid var(--line);
  border-radius: 1rem;
  background:
    radial-gradient(120% 90% at 100% 0%, var(--accent-wash), transparent 55%),
    var(--ink-850);
}

/* Month ruler: a hairline baseline, a short tick per week, a taller
   one where a month begins, and the month name above it. */
.gh-ruler {
  position: relative;
  width: var(--ruler-w, 100%);
  height: 1.9rem;
  margin-left: calc(var(--day-col) + var(--s-2));
  margin-bottom: var(--s-2);
  border-bottom: 1px solid var(--line-strong);
}

.gh-tick {
  position: absolute;
  bottom: 0;
  width: 1px;
  height: 4px;
  background: var(--line-strong);
}

.gh-tick.is-month {
  height: 9px;
  background: var(--text-mid);
}

.gh-month {
  position: absolute;
  top: 0;
  color: var(--text-mid);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
}

.gh-body {
  display: flex;
  gap: var(--s-2);
}

.gh-days {
  display: grid;
  flex: none;
  width: var(--day-col);
  grid-template-rows: repeat(7, var(--cell-fit, var(--cell)));
  gap: var(--gap);
  color: var(--text-mid);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  line-height: var(--cell-fit, var(--cell));
}

.gh-grid-wrap {
  position: relative;
  flex: 1;
  min-width: 0;
}

/* --cell is the base size; js/interactions.js sets --cell-fit when
   the squares can grow to fill the card. */
.github-graph {
  display: grid;
  width: max-content;
  grid-auto-columns: var(--cell-fit, var(--cell));
  grid-auto-flow: column;
  grid-template-rows: repeat(7, var(--cell-fit, var(--cell)));
  gap: var(--gap);
}

.github-cell {
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.05);
  transition: transform var(--dur-1) var(--ease-out), box-shadow var(--dur-1) var(--ease-out);
}

.github-cell[data-level="1"] {
  background: color-mix(in srgb, var(--accent) 28%, var(--ink-900));
}

.github-cell[data-level="2"] {
  background: color-mix(in srgb, var(--accent) 50%, var(--ink-900));
}

.github-cell[data-level="3"] {
  background: color-mix(in srgb, var(--accent) 74%, var(--ink-900));
}

/* The busiest days glow faintly, like lit pixels. */
.github-cell[data-level="4"] {
  background: var(--accent);
  box-shadow: 0 0 10px color-mix(in srgb, var(--accent) 55%, transparent);
}

.github-cell.is-empty {
  background: transparent;
}

.github-cell.is-pointed {
  outline: 1.5px solid var(--text);
  outline-offset: 1px;
  transform: scale(1.15);
}

/* The render pass: columns fill in left to right, once. */
.github-graph.is-drawing .github-cell {
  animation: gh-fill 0.45s var(--ease-out) both;
  animation-delay: calc(var(--c, 0) * 22ms);
}

@keyframes gh-fill {
  from {
    opacity: 0;
    transform: scale(0.4);
  }
}

/* The playhead: a green line down the hovered week, with a dot at
   the top, the same mark as the scroll bar along the page edge. */
.gh-playhead {
  position: absolute;
  top: -0.6rem;
  bottom: -0.35rem;
  width: 2px;
  margin-left: -1px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  opacity: 0;
  pointer-events: none;
  transition: left 0.18s var(--ease-out), opacity var(--dur-1) var(--ease-out);
}

.gh-playhead::before {
  position: absolute;
  top: -3px;
  left: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  transform: translateX(-50%);
  content: "";
}

.gh-tip {
  position: absolute;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  border-radius: 0.6rem;
  background: var(--ink-900);
  box-shadow: 0 12px 30px -12px rgba(0, 0, 0, 0.9);
  color: var(--text-mid);
  font-size: var(--fs-small);
  line-height: 1.3;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, calc(-100% - 0.75rem));
  transition: opacity var(--dur-1) var(--ease-out);
}

.gh-tip strong {
  color: var(--accent);
  font-weight: 600;
}

.is-pointing .gh-playhead,
.is-pointing .gh-tip {
  opacity: 1;
}

/* Stats under the strip, on a hairline. */
.gh-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: var(--s-4) var(--s-6);
  margin: clamp(1.25rem, 1rem + 1vw, 2rem) 0 0;
  padding-top: clamp(1.25rem, 1rem + 1vw, 1.75rem);
  border-top: 1px solid var(--line);
}

.gh-stat {
  display: flex;
  flex-direction: column;
  gap: var(--s-1);
}

.gh-stat dt {
  color: var(--text-mid);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: var(--track-label);
  text-transform: uppercase;
}

.gh-stat dd {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 var(--s-2);
  margin: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 600;
  letter-spacing: var(--track-display);
}

.gh-stat dd span {
  color: var(--text-mid);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 400;
  letter-spacing: 0;
}

/* Narrow phones: the side labels take space the squares need. */
@media (max-width: 479px) {
  .github-scroll {
    --day-col: 1.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .github-graph.is-drawing .github-cell {
    animation: none;
  }
}

/* ---- Contact: the calm close -----------------------------------------
   Everything centred around one statement, then a vertical list of
   label/value rows on hairlines, then a two-column row (where I am,
   my local time). Same on every width; the rows simply put the label
   beside the value once there is room.
---------------------------------------------------------------- */

.contact > .section-head {
  justify-content: center;
  text-align: center;
}

.contact-statement {
  max-width: 13em;
  margin: 0 auto;
  font-family: var(--font-display);
  font-size: var(--fs-display);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: var(--track-display);
  text-align: center;
  text-wrap: balance;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--s-3);
  margin-top: var(--s-6);
}

.contact-list,
.contact-pair {
  max-width: 56rem;
  margin: 0 auto;
}

.contact-list {
  margin-top: clamp(3rem, 2rem + 4vw, 6rem);
  border-top: 1px solid var(--line);
}

.contact-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-1);
  padding-block: var(--s-4);
  border-bottom: 1px solid var(--line);
}

.contact-row dt,
.contact-cell dt {
  color: var(--text-mid);
  font-size: var(--fs-small);
}

.contact-row dd,
.contact-cell dd {
  margin: 0;
  font-size: var(--fs-lead);
}

@media (min-width: 768px) {
  .contact-row {
    grid-template-columns: 12rem minmax(0, 1fr);
    align-items: center;
    gap: var(--s-6);
  }
}

.contact-value-link {
  display: inline-flex;
  min-height: var(--tap);
  align-items: center;
  gap: var(--s-2);
  overflow-wrap: anywhere;
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 0.3em;
  transition: color var(--dur-1) var(--ease-out);
}

.contact-value-link:hover,
.contact-value-link:focus-visible {
  color: var(--accent);
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0 var(--s-5);
  margin: 0;
  padding: 0;
  list-style: none;
}

.contact-links a {
  display: inline-flex;
  min-height: var(--tap);
  align-items: center;
  transition: color var(--dur-1) var(--ease-out);
}

.contact-links a:hover,
.contact-links a:focus-visible {
  color: var(--accent);
}

/* Two columns at every width, phones included. */
.contact-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-bottom: 1px solid var(--line);
}

.contact-cell {
  display: flex;
  flex-direction: column;
  gap: var(--s-1);
  padding-block: var(--s-4);
}

.contact-cell + .contact-cell {
  padding-left: var(--s-5);
  border-left: 1px solid var(--line);
}

.contact-time {
  font-variant-numeric: tabular-nums;
}

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

.site-footer {
  overflow: hidden;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  width: var(--page);
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0 var(--s-6);
  margin-inline: auto;
  /* Bottom padding clears the fixed bottom fade and the home bar. */
  padding-block: var(--s-5) calc(var(--s-7) + var(--safe-bottom));
  color: var(--text-mid);
  font-size: var(--fs-small);
}

.footer-legal {
  display: flex;
  gap: var(--s-5);
}

/* Phones: copyright and "Back to top" share the first row, the
   legal links sit on their own row below. */
@media (max-width: 767px) {
  .footer-legal {
    order: 3;
    width: 100%;
  }
}

.footer-legal a,
.footer-top {
  display: inline-flex;
  min-height: var(--tap);
  align-items: center;
  transition: color var(--dur-1) var(--ease-out);
}

.footer-legal a:hover,
.footer-legal a:focus-visible,
.footer-top:hover,
.footer-top:focus-visible {
  color: var(--accent);
}

/* Videos (AI hooks) open in the same lightbox as the screenshots. */
.lightbox video {
  display: block;
  width: 100%;
  max-height: 88svh;
  background: var(--ink-900);
}

.lightbox [hidden] {
  display: none;
}

/* ---- Certificates carousel (phones) ---------------------------------
   Same component as the analytics carousel; js/interactions.js only
   switches it to 3D below 768px. Wider screens keep the plain track,
   which is the three-card grid (.cert-grid above).
---------------------------------------------------------------- */

.cert-carousel {
  /* Narrow enough that the neighbours peek in at the screen edges. */
  --slide-w: min(68vw, 20rem);
}

.cert-carousel:not(.is-3d) .proof-track {
  overflow: visible;
  padding-bottom: 0;
  scroll-snap-type: none;
}

/* Side certificates step back; only the middle one reads in full. */
.cert-carousel.is-3d .proof-slide .cert-card {
  transition: opacity 0.5s var(--ease-out);
}

.cert-carousel.is-3d .proof-slide:not(.is-active) .cert-card {
  opacity: 0.45;
}

/* Only the middle certificate is captioned; the side ones would
   otherwise print their titles beside it. */
.cert-carousel.is-3d .cert-title,
.cert-carousel.is-3d .cert-meta {
  transition: opacity var(--dur-2) var(--ease-out);
}

.cert-carousel.is-3d .proof-slide:not(.is-active) .cert-title,
.cert-carousel.is-3d .proof-slide:not(.is-active) .cert-meta {
  opacity: 0;
}

/* ---- Project brief form ------------------------------------------- */

.brief {
  max-width: 56rem;
  margin: var(--head-gap) auto 0;
  padding: clamp(1.25rem, 0.9rem + 1.6vw, 2.5rem);
  border: 1px solid var(--line);
  background: var(--ink-850);
  text-align: left;
}

.brief-heading {
  margin: 0 0 var(--s-5);
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 600;
  letter-spacing: var(--track-display);
}

.brief-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4) var(--s-5);
}

@media (min-width: 768px) {
  .brief-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .brief-wide {
    grid-column: 1 / -1;
  }
}

.brief-field {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}

.brief-field > span {
  color: var(--text-mid);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: var(--track-label);
  text-transform: uppercase;
}

.brief-field input,
.brief-field select,
.brief-field textarea {
  width: 100%;
  min-height: var(--tap);
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: var(--ink-900);
  color: var(--text);
  /* 16px or more stops iOS zooming the page when a field is tapped. */
  font: inherit;
  font-size: max(16px, var(--fs-body));
  transition: border-color var(--dur-1) var(--ease-out);
}

.brief-field textarea {
  min-height: 8rem;
  resize: vertical;
}

.brief-field select {
  appearance: none;
  /* A small chevron, drawn with two gradients. */
  background-image:
    linear-gradient(45deg, transparent 50%, var(--text-mid) 50%),
    linear-gradient(135deg, var(--text-mid) 50%, transparent 50%);
  background-position: calc(100% - 1.15rem) 50%, calc(100% - 0.8rem) 50%;
  background-size: 0.35rem 0.35rem;
  background-repeat: no-repeat;
  padding-right: 2.25rem;
}

.brief-field input::placeholder,
.brief-field textarea::placeholder {
  color: var(--text-mid);
  opacity: 0.7;
}

.brief-field input:focus,
.brief-field select:focus,
.brief-field textarea:focus {
  border-color: var(--accent);
  outline: none;
}

.brief-field input:focus-visible,
.brief-field select:focus-visible,
.brief-field textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.brief-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-3) var(--s-5);
  margin-top: var(--s-5);
}

.brief-status {
  margin: 0;
  color: var(--text-mid);
  font-size: var(--fs-small);
}

.brief-status[data-state="ok"] {
  color: var(--accent);
}

.brief-status[data-state="error"] {
  color: var(--danger);
}

/* Phones: the send button runs the full width, thumb-sized. */
@media (max-width: 599px) {
  .brief-foot .button {
    width: 100%;
  }
}