/* ==========================================================================
   Telemetry — an instrument-panel design system for the portfolio page.
   Every claim ships as a live, quantified readout: real seven-segment
   digits (CSS clip-path segment masks, not a font), ghost/unlit segments
   always present, restrained enameled-panel materiality.
   ========================================================================== */

:root {
  --bg: #0a0b0d;
  --panel: #141518;
  --panel-raised: #1b1d21;
  --bezel: #2b2e33;
  --bezel-bright: #3a3d43;

  --text: #eef0ee;
  --text-muted: color-mix(in srgb, #eef0ee 58%, #2b2e33);
  --text-faint: color-mix(in srgb, #eef0ee 50%, #2b2e33);

  --signal-amber: #ffb020;
  --signal-amber-dim: color-mix(in srgb, #ffb020 12%, transparent);
  --signal-green: #35d17a;
  --signal-green-dim: color-mix(in srgb, #35d17a 14%, transparent);

  --led-on: var(--signal-green);
  --led-off: color-mix(in srgb, var(--signal-green) 9%, var(--panel-raised));

  --font-display: "Hanken Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Consolas, monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;

  --radius-sm: 3px;
  --radius-md: 6px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(900px 500px at 88% -8%, color-mix(in srgb, var(--signal-green) 7%, transparent), transparent 60%),
    radial-gradient(700px 500px at 4% 108%, color-mix(in srgb, var(--signal-amber) 5%, transparent), transparent 55%);
  background-repeat: no-repeat;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
}

h1, h2, h3 { font-family: var(--font-display); line-height: 1.08; letter-spacing: -0.02em; margin: 0; }
p { margin: 0 0 var(--space-3); }
img { display: block; max-width: 100%; }
figure { margin: 0; }

a { color: var(--signal-amber); text-decoration: none; text-underline-offset: 3px; }
a:hover { color: color-mix(in srgb, var(--signal-amber) 80%, white); }

:focus { outline: none; }
:focus-visible { outline: 2px solid var(--signal-amber); outline-offset: 3px; }
::selection { background: color-mix(in srgb, var(--signal-green) 35%, transparent); color: #fff; }

/* Scrollbar theming (webkit) so the browser chrome carries the panel too. */
::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--bezel); border-radius: 6px; border: 3px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--bezel-bright); }
* { scrollbar-color: var(--bezel) var(--bg); scrollbar-width: thin; }

.lighten { mix-blend-mode: lighten; background-color: transparent; }

/* — divider: a hairline bezel seam — */
.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(to right,
    transparent, var(--bezel) 48px,
    var(--bezel) calc(100% - 48px), transparent);
}

/* — mono label: engraved-plate lettering used for chrome, never as an
   eyebrow over a heading — always inline with, or as, real content. — */
.mono-label {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
  color: var(--text-faint);
}

/* — buttons: labeled panel push-buttons, sharp corners, mono caps. — */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  cursor: pointer; text-decoration: none;
  appearance: none; -webkit-appearance: none;
  background: transparent; margin: 0;
  font-family: var(--font-mono); font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.06em;
  font-size: 12.5px; line-height: 1.2;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-primary { color: var(--signal-amber); border-color: var(--signal-amber); background: color-mix(in srgb, var(--signal-amber) 6%, transparent); }
.btn-primary:hover { color: #0a0b0d; background: var(--signal-amber); }
.btn-primary:active { background: color-mix(in srgb, var(--signal-amber) 82%, black); }
.btn-ghost { color: var(--text); border-color: var(--bezel-bright); }
.btn-ghost:hover { color: var(--text); border-color: var(--text-muted); background: color-mix(in srgb, white 4%, transparent); }
.btn-ghost:active { background: color-mix(in srgb, white 8%, transparent); }

/* — switches: skill tags as physical toggle switches, all engaged. — */
.switch {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.01em;
  color: var(--text);
  background: var(--panel-raised);
  border: 1px solid var(--bezel);
  border-radius: var(--radius-sm);
  padding: 7px 12px 7px 8px;
}
.switch-track {
  position: relative; flex: none;
  width: 24px; height: 14px;
  background: #050506;
  border: 1px solid var(--bezel-bright);
  border-radius: 2px;
}
.switch-knob {
  position: absolute; top: 2px; right: 2px;
  width: 8px; height: 8px;
  background: var(--signal-green);
  border-radius: 1px;
}

/* ==========================================================================
   Page
   ========================================================================== */

.skip-link {
  position: absolute; left: -9999px; top: 0;
  padding: var(--space-3) var(--space-4);
  background: var(--panel-raised); color: var(--text);
  border: 1px solid var(--bezel-bright);
  border-radius: var(--radius-md); z-index: 10;
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

/* — nav — */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
  padding: 20px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid var(--bezel);
}
.nav-brand {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-weight: 500;
  font-size: 13.5px; letter-spacing: 0.02em;
  color: var(--text);
}
.status-dot {
  width: 7px; height: 7px; border-radius: 50%; flex: none;
  background: var(--signal-green);
}
.nav-links { display: flex; gap: 26px; align-items: center; flex-wrap: wrap; }
.nav a:not(.btn) {
  color: var(--text-muted); font-family: var(--font-mono);
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em;
}
.nav a:not(.btn):hover { color: var(--text); }

.shell {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 72px);
}

/* — section heading: the heading IS the label; no eyebrow above it. — */
.section-head {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  color: var(--text);
  margin: 0 0 var(--space-8);
  display: flex; align-items: baseline; gap: var(--space-3);
}
.section-head::after {
  content: '';
  flex: 1 1 auto;
  height: 1px;
  background: var(--bezel);
  transform: translateY(-4px);
}

/* ==========================================================================
   Seven-segment digit component
   Each digit is 7 masked cells; a digit's shape lives in HTML (data-digit),
   its lit/unlit state lives in CSS, gated by the ancestor readout's
   [data-revealed] so digits power up only once scrolled into view.
   ========================================================================== */

.led-digit {
  position: relative;
  display: inline-block;
  width: 0.56em;
  aspect-ratio: 10 / 17;
  margin: 0 0.045em;
}
.led-digit .seg {
  position: absolute;
  background: var(--led-off);
  transition: background-color 0.5s ease;
}
.seg-a, .seg-g, .seg-d { left: 9%; width: 82%; height: 11%; }
.seg-a { top: 0; clip-path: polygon(12% 0, 88% 0, 100% 50%, 88% 100%, 12% 100%, 0 50%); }
.seg-g { top: 44.5%; clip-path: polygon(12% 0, 88% 0, 100% 50%, 88% 100%, 12% 100%, 0 50%); }
.seg-d { bottom: 0; clip-path: polygon(12% 0, 88% 0, 100% 50%, 88% 100%, 12% 100%, 0 50%); }
.seg-f, .seg-b, .seg-e, .seg-c { width: 13%; height: 40%; }
.seg-f, .seg-e { left: 0; }
.seg-b, .seg-c { right: 0; }
.seg-f, .seg-b { top: 6%; }
.seg-e, .seg-c { bottom: 6%; }
.seg-f, .seg-b, .seg-e, .seg-c { clip-path: polygon(0 12%, 50% 0, 100% 12%, 100% 88%, 50% 100%, 0 88%); }

/* Digit-to-segment lookup: only lit once the readout is revealed. */
.readout[data-revealed] .led-digit[data-digit="0"] .seg-a,
.readout[data-revealed] .led-digit[data-digit="0"] .seg-b,
.readout[data-revealed] .led-digit[data-digit="0"] .seg-c,
.readout[data-revealed] .led-digit[data-digit="0"] .seg-d,
.readout[data-revealed] .led-digit[data-digit="0"] .seg-e,
.readout[data-revealed] .led-digit[data-digit="0"] .seg-f,

.readout[data-revealed] .led-digit[data-digit="1"] .seg-b,
.readout[data-revealed] .led-digit[data-digit="1"] .seg-c,

.readout[data-revealed] .led-digit[data-digit="2"] .seg-a,
.readout[data-revealed] .led-digit[data-digit="2"] .seg-b,
.readout[data-revealed] .led-digit[data-digit="2"] .seg-g,
.readout[data-revealed] .led-digit[data-digit="2"] .seg-e,
.readout[data-revealed] .led-digit[data-digit="2"] .seg-d,

.readout[data-revealed] .led-digit[data-digit="3"] .seg-a,
.readout[data-revealed] .led-digit[data-digit="3"] .seg-b,
.readout[data-revealed] .led-digit[data-digit="3"] .seg-g,
.readout[data-revealed] .led-digit[data-digit="3"] .seg-c,
.readout[data-revealed] .led-digit[data-digit="3"] .seg-d,

.readout[data-revealed] .led-digit[data-digit="4"] .seg-f,
.readout[data-revealed] .led-digit[data-digit="4"] .seg-g,
.readout[data-revealed] .led-digit[data-digit="4"] .seg-b,
.readout[data-revealed] .led-digit[data-digit="4"] .seg-c,

.readout[data-revealed] .led-digit[data-digit="5"] .seg-a,
.readout[data-revealed] .led-digit[data-digit="5"] .seg-f,
.readout[data-revealed] .led-digit[data-digit="5"] .seg-g,
.readout[data-revealed] .led-digit[data-digit="5"] .seg-c,
.readout[data-revealed] .led-digit[data-digit="5"] .seg-d,

.readout[data-revealed] .led-digit[data-digit="6"] .seg-a,
.readout[data-revealed] .led-digit[data-digit="6"] .seg-f,
.readout[data-revealed] .led-digit[data-digit="6"] .seg-g,
.readout[data-revealed] .led-digit[data-digit="6"] .seg-e,
.readout[data-revealed] .led-digit[data-digit="6"] .seg-c,
.readout[data-revealed] .led-digit[data-digit="6"] .seg-d,

.readout[data-revealed] .led-digit[data-digit="7"] .seg-a,
.readout[data-revealed] .led-digit[data-digit="7"] .seg-b,
.readout[data-revealed] .led-digit[data-digit="7"] .seg-c,

.readout[data-revealed] .led-digit[data-digit="8"] .seg-a,
.readout[data-revealed] .led-digit[data-digit="8"] .seg-b,
.readout[data-revealed] .led-digit[data-digit="8"] .seg-c,
.readout[data-revealed] .led-digit[data-digit="8"] .seg-d,
.readout[data-revealed] .led-digit[data-digit="8"] .seg-e,
.readout[data-revealed] .led-digit[data-digit="8"] .seg-f,
.readout[data-revealed] .led-digit[data-digit="8"] .seg-g,

.readout[data-revealed] .led-digit[data-digit="9"] .seg-a,
.readout[data-revealed] .led-digit[data-digit="9"] .seg-f,
.readout[data-revealed] .led-digit[data-digit="9"] .seg-g,
.readout[data-revealed] .led-digit[data-digit="9"] .seg-b,
.readout[data-revealed] .led-digit[data-digit="9"] .seg-c,
.readout[data-revealed] .led-digit[data-digit="9"] .seg-d {
  background: var(--led-on);
  box-shadow: 0 0 6px 0 color-mix(in srgb, var(--led-on) 55%, transparent);
}

/* — readout: a digit group + suffix + label, the panel's basic instrument. — */
.readout { display: inline-flex; flex-direction: column; gap: 8px; }
.readout-value {
  display: inline-flex; align-items: baseline;
  font-size: 44px;
  color: var(--led-on);
}
.readout-suffix {
  font-family: var(--font-mono); font-weight: 600;
  font-size: 0.5em; margin-left: 2px;
  color: var(--led-on);
  opacity: 0.35; transition: opacity 0.5s ease;
}
.readout[data-revealed] .readout-suffix { opacity: 1; }
.readout-label {
  font-family: var(--font-mono);
  font-size: 11.5px; letter-spacing: 0.03em;
  color: var(--text-muted);
  max-width: 22ch;
}
.readout--amber { --led-on: var(--signal-amber); --led-off: color-mix(in srgb, var(--signal-amber) 9%, var(--panel-raised)); }
.readout--lg .readout-value { font-size: 76px; }
.readout--sm .readout-value { font-size: 30px; }

/* ==========================================================================
   Hero — the instrument cluster.
   ========================================================================== */

.hero {
  padding: 88px 0 56px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
.hero-role {
  font-family: var(--font-mono);
  font-size: 15px; letter-spacing: 0.01em;
  color: var(--signal-amber);
  margin: 14px 0 0;
}
.hero-title {
  font-size: clamp(42px, 5.6vw, 72px);
  font-weight: 700;
  margin: 0;
}
.hero-lead {
  font-size: 16.5px; line-height: 1.65;
  max-width: 56ch;
  margin: 22px 0 0;
  color: color-mix(in srgb, var(--text) 82%, transparent);
}
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }

.instrument-cluster {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--bezel);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: 0 1px 0 0 color-mix(in srgb, white 4%, transparent) inset;
}
.instrument-cluster::before,
.instrument-cluster::after,
.instrument-cluster-rivets::before,
.instrument-cluster-rivets::after {
  content: ''; position: absolute; width: 5px; height: 5px; border-radius: 50%;
  background: var(--bezel-bright); top: 10px;
}
.instrument-cluster::before { left: 10px; }
.instrument-cluster::after { right: 10px; }
.instrument-cluster-rivets::before { left: 10px; bottom: 10px; top: auto; }
.instrument-cluster-rivets::after { right: 10px; bottom: 10px; top: auto; }
.instrument-cluster-label {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-faint);
  margin: 0 0 var(--space-6);
}
.instrument-cluster-primary { margin-bottom: var(--space-6); }
.instrument-cluster-secondary {
  display: flex; gap: clamp(20px, 4vw, 40px); flex-wrap: wrap;
  padding-top: var(--space-6);
  border-top: 1px solid var(--bezel);
}

/* — about — */
.about {
  padding: 64px 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: clamp(24px, 5vw, 72px);
  align-items: start;
}
.about-photo { max-width: 260px; }
.about-photo img {
  width: 100%; height: auto; aspect-ratio: 1 / 1; object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--bezel);
}
.about-body {
  font-size: 16.5px; line-height: 1.7;
  max-width: 62ch; margin: 0;
  color: var(--text);
}

/* — skills — */
.skills { padding: 48px 0 64px; }
.skill-list { display: flex; flex-wrap: wrap; gap: 10px; }

/* — experience — */
.experience { padding: 64px 0; }
.exp-panel {
  background: var(--panel);
  border: 1px solid var(--bezel);
  border-radius: var(--radius-md);
  padding: 32px;
}
.exp-record {
  display: flex; flex-wrap: wrap; gap: 6px 20px;
  font-family: var(--font-mono); font-size: 12.5px;
  color: var(--text-muted);
  padding-bottom: var(--space-6);
  margin-bottom: var(--space-8);
  border-bottom: 1px solid var(--bezel);
}
.exp-record strong { color: var(--text); font-weight: 500; }
.exp-readouts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: var(--space-8) var(--space-4);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--bezel);
}
.exp-log { display: grid; gap: var(--space-6); }
.exp-log-entry { display: grid; grid-template-columns: minmax(110px, 140px) 1fr; gap: var(--space-4); }
.exp-log-tag {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--signal-amber);
  padding-top: 3px;
}
.exp-log-body {
  font-size: 15px; line-height: 1.65;
  margin: 0; max-width: 62ch;
  color: color-mix(in srgb, var(--text) 85%, transparent);
}
.exp-actions { margin-top: var(--space-8); }

/* — work — */
.work { padding: 64px 0 32px; }

.project {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(24px, 5vw, 72px);
  align-items: start;
  padding-bottom: 56px;
}
.project:last-child { padding-bottom: 8px; }

.project-title {
  font-size: 25px; font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0;
}
.project-role { margin: 12px 0 0; }
.project-body {
  font-size: 15px; line-height: 1.7;
  margin: 14px 0 0; max-width: 56ch;
  color: color-mix(in srgb, var(--text) 82%, transparent);
}

.tag {
  display: inline-flex; align-items: center;
  font-family: var(--font-mono);
  font-size: 11.5px; letter-spacing: 0.04em; text-transform: uppercase;
  padding: 4px 9px;
  border-radius: var(--radius-sm);
}
.tag-accent { background: var(--signal-amber-dim); color: var(--signal-amber); border: 1px solid color-mix(in srgb, var(--signal-amber) 40%, transparent); }
.tag-outline { border: 1px solid var(--bezel-bright); color: var(--text-muted); }

/* — slideshow (mechanics unchanged; restyled to the panel world) — */
.slides {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--bezel);
  touch-action: pan-y;
}
.slides[data-dragging] { cursor: grabbing; }
.slide[data-dragging] { visibility: visible; }
.slide img { user-select: none; -webkit-user-drag: none; }
.slide {
  position: absolute; inset: 0;
  visibility: hidden;
  transform: translateX(100%);
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}
.slide[data-active], .slide[data-leaving] { visibility: visible; }
.slide[data-active] { transform: translateX(0); z-index: 1; }
.slide img { width: 100%; height: 100%; object-fit: contain; }

.slide-placeholder {
  display: grid; place-items: center;
  width: 100%; height: 100%;
  padding: var(--space-6);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
  background: var(--panel);
  border: 1px dashed var(--bezel);
  border-radius: var(--radius-md);
}

.slide-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 32px; height: 32px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--bezel-bright);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  color: var(--text);
  font-size: 16px; line-height: 1;
  cursor: pointer; z-index: 2;
}
.slide-nav:hover { border-color: var(--signal-amber); color: var(--signal-amber); }
.slide-prev { left: 8px; }
.slide-next { right: 8px; }

.slide-dots {
  position: absolute; bottom: 10px; left: 0; right: 0;
  display: flex; justify-content: center; gap: 6px;
  z-index: 2;
}
.slide-dot {
  width: 6px; height: 6px; padding: 0;
  border-radius: 1px; border: none;
  background: var(--bezel-bright);
  cursor: pointer;
}
.slide-dot[data-active] { background: var(--signal-amber); }

.slide-captions { margin-top: 10px; min-height: 20px; }
.slide-caption {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px; line-height: 20px;
  color: var(--text-faint);
  display: none;
}
.slide-caption[data-active] { display: block; }

/* — lightbox — */
.slide img[data-expandable] { cursor: zoom-in; }

.lightbox {
  width: 100vw; height: 100dvh;
  max-width: 100vw; max-height: 100dvh;
  margin: 0; padding: clamp(16px, 4vw, 48px);
  border: 0; background: transparent;
  color: var(--text);
  overflow: hidden;
}
.lightbox:not([open]) { display: none; }
.lightbox[open] {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: var(--space-4);
}
.lightbox::backdrop {
  background: color-mix(in srgb, #000 90%, transparent);
  backdrop-filter: blur(3px);
}

.lightbox-stage {
  position: relative;
  display: flex; align-items: center; justify-content: center;
  gap: clamp(8px, 2vw, 20px);
  width: 100%; min-width: 0; min-height: 0;
}
.lightbox-img {
  flex: 0 1 auto; min-width: 0;
  max-width: 1400px;
  max-height: 82dvh;
  object-fit: contain;
  border-radius: var(--radius-md);
  border: 1px solid var(--bezel);
  animation: lightbox-in 0.22s cubic-bezier(0.2, 0.8, 0.25, 1);
}
@keyframes lightbox-in {
  from { opacity: 0; transform: scale(0.94); }
}

.lightbox-nav {
  flex: none;
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--bezel-bright);
  background: color-mix(in srgb, var(--bg) 75%, transparent);
  color: var(--text);
  font-size: 20px; line-height: 1;
  cursor: pointer;
}
.lightbox-nav:hover { border-color: var(--signal-amber); color: var(--signal-amber); }
.lightbox-nav[hidden] { display: none; }

.lightbox-close {
  position: absolute; top: clamp(12px, 3vw, 28px); right: clamp(12px, 3vw, 28px);
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--bezel-bright);
  background: color-mix(in srgb, var(--bg) 75%, transparent);
  color: var(--text);
  font-size: 22px; line-height: 1;
  cursor: pointer;
}
.lightbox-close:hover { border-color: var(--signal-amber); color: var(--signal-amber); }

.lightbox-caption {
  margin: 0; text-align: center;
  font-family: var(--font-mono);
  font-size: 12.5px; line-height: 20px;
  color: var(--text-faint);
}
.lightbox-caption:empty { display: none; }

@media (max-width: 700px) {
  .lightbox { padding: 12px; }
  .lightbox-stage { width: 100%; display: block; }
  .lightbox-img { width: 100%; max-height: 74dvh; }
  .lightbox-nav {
    position: absolute; top: 50%; transform: translateY(-50%);
    width: 38px; height: 38px; z-index: 2;
  }
  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }
  .lightbox-close { top: 8px; right: 8px; width: 36px; height: 36px; }
  .lightbox-caption { padding: 0 8px; }
}

.scroll-locked { overflow: hidden; }

/* — contact: a status panel — */
.contact { padding: 56px 0 48px; }
.contact-panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--bezel);
  border-radius: var(--radius-md);
  padding: 36px;
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: var(--space-8); flex-wrap: wrap;
}
.contact-status {
  position: absolute; top: 16px; right: 20px;
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--signal-green);
}
.contact h2 { font-size: 27px; font-weight: 700; margin: 0; }
.contact-lead {
  font-size: 15px; line-height: 1.7;
  margin: 12px 0 0; max-width: 52ch;
  color: color-mix(in srgb, var(--text) 82%, transparent);
}
.contact .actions { margin-top: 22px; }

/* — footer — */
.site-footer {
  padding: 32px 0;
  font-family: var(--font-mono);
  font-size: 11.5px; letter-spacing: 0.02em;
  color: var(--text-faint);
}

/* — scroll reveal — */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.7, 0.3, 1);
  will-change: opacity, transform;
}
.reveal[data-revealed] {
  opacity: 1;
  transform: none;
}
/* Readouts power their digits up instead of translating; cancel the generic
   fade on the readout itself so only the segments animate. */
.readout.reveal {
  opacity: 1;
  transform: none;
  transition: none;
}

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

/* ==========================================================================
   Digital twin — a docked instrument panel, not a chat bubble.
   Turns render as a log (mono speaker tag + prose), never rounded bubbles;
   the "thinking" state is a segment sweep, reusing the page's own LED
   vocabulary rather than a generic dot-typing indicator.
   ========================================================================== */

/* — launcher — */
.twin-launcher {
  position: fixed; right: 20px; bottom: 20px; z-index: 20;
  display: inline-flex; align-items: center; gap: 8px;
  cursor: pointer;
  font-family: var(--font-mono); font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.06em;
  font-size: 12px;
  padding: 12px 16px;
  color: var(--text);
  background: var(--panel-raised);
  border: 1px solid var(--bezel-bright);
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px -10px color-mix(in srgb, #000 60%, transparent);
  transition: border-color 0.15s ease, color 0.15s ease;
}
.twin-launcher:hover { border-color: var(--signal-amber); color: var(--signal-amber); }

/* Both twin entry points set `display` on their base class (.twin-launcher
   is inline-flex, .btn is inline-flex too), which would otherwise beat the
   UA's [hidden]{display:none} — same fix already applied to .lightbox-nav. */
[data-twin-open][hidden] { display: none; }

/* — panel: a docked dialog, not the lightbox's full-viewport one — */
.twin {
  position: fixed; inset: auto 16px 16px auto;
  width: min(420px, calc(100vw - 32px));
  height: min(620px, calc(100vh - 32px));
  max-width: none; max-height: none;
  margin: 0; padding: 0;
  display: flex; flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--bezel);
  border-radius: var(--radius-md);
  color: var(--text);
  box-shadow: 0 16px 40px -12px color-mix(in srgb, #000 55%, transparent);
  z-index: 21;
}
.twin:not([open]) { display: none; }
.twin::backdrop { background: color-mix(in srgb, #000 62%, transparent); }

.twin-head {
  position: relative; flex: none;
  padding: 16px 100px 14px 18px;
  border-bottom: 1px solid var(--bezel);
}
.twin-title {
  display: inline-flex; align-items: center; gap: 8px;
  margin: 0;
  font-family: var(--font-mono); font-weight: 500;
  font-size: 13.5px; letter-spacing: 0.02em;
  color: var(--text);
}
.twin-sub {
  margin: 4px 0 0;
  font-family: var(--font-mono); font-size: 12px;
  color: var(--text-faint);
}
.twin-reset {
  position: absolute; top: 15px; right: 48px;
  font-family: var(--font-mono); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--text-faint);
  background: transparent;
  border: 1px solid var(--bezel-bright);
  border-radius: var(--radius-sm);
  padding: 5px 9px;
  cursor: pointer;
}
.twin-reset:hover { color: var(--text); border-color: var(--text-muted); }
.twin-close {
  position: absolute; top: 10px; right: 10px;
  width: 30px; height: 30px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--bezel-bright);
  background: transparent;
  color: var(--text);
  font-size: 18px; line-height: 1;
  cursor: pointer;
}
.twin-close:hover { border-color: var(--signal-amber); color: var(--signal-amber); }

/* — stream: a log, not a bubble list — */
.twin-stream {
  flex: 1; min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 4px 18px 8px;
}
.twin-turn { padding-top: 14px; }
.twin-turn + .twin-turn { border-top: 1px solid var(--bezel); }
.twin-tag {
  display: block; margin: 0 0 6px;
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--text-faint);
}
.twin-turn--twin .twin-tag { color: var(--signal-amber); }
.twin-body {
  font-size: 14.5px; line-height: 1.65;
  color: color-mix(in srgb, var(--text) 88%, transparent);
}
.twin-body p { margin: 0 0 10px; }
.twin-body p:last-child { margin-bottom: 0; }
.twin-body strong { color: var(--text); font-weight: 600; }
.twin-body code {
  font-family: var(--font-mono); font-size: 0.92em;
  background: var(--panel-raised);
  border: 1px solid var(--bezel);
  border-radius: 3px;
  padding: 1px 5px;
}
.twin-body ul { margin: 6px 0; padding-left: 18px; }
.twin-body li { margin: 3px 0; }
.twin-turn[data-failed] { opacity: 0.5; }

/* — thinking: a segment sweep, matching the page's own LED vocabulary — */
.twin-thinking {
  display: flex; align-items: center; gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--bezel);
}
.twin-sweep { display: inline-flex; gap: 4px; }
.twin-sweep-cell {
  width: 6px; height: 14px;
  border-radius: 1px;
  background: var(--led-off);
  animation: twin-sweep 1.1s ease-in-out infinite;
}
.twin-sweep-cell:nth-child(1) { animation-delay: 0s; }
.twin-sweep-cell:nth-child(2) { animation-delay: 0.11s; }
.twin-sweep-cell:nth-child(3) { animation-delay: 0.22s; }
.twin-sweep-cell:nth-child(4) { animation-delay: 0.33s; }
.twin-sweep-cell:nth-child(5) { animation-delay: 0.44s; }
@keyframes twin-sweep {
  0%, 100% { background: var(--led-off); box-shadow: none; }
  40% { background: var(--led-on); box-shadow: 0 0 6px 0 color-mix(in srgb, var(--led-on) 55%, transparent); }
}
.twin-thinking-label {
  font-family: var(--font-mono); font-size: 11.5px;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

/* — error row — */
.twin-error {
  margin-top: 12px;
  padding: 12px 14px;
  background: var(--signal-amber-dim);
  border: 1px solid color-mix(in srgb, var(--signal-amber) 40%, transparent);
  border-radius: var(--radius-sm);
  font-size: 13.5px; line-height: 1.6;
  color: var(--text);
}
.twin-error p { margin: 0; }
.twin-error-id {
  display: block; margin-top: 6px;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--text-faint);
}
.twin-error-actions { margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }
.twin-error-actions .btn { padding: 7px 12px; font-size: 11px; }
.twin-countdown-row { display: flex; align-items: center; gap: 10px; margin-top: 10px; }

/* — suggested questions, shown only on an empty thread — */
.twin-suggest { display: flex; flex-wrap: wrap; gap: 8px; padding: 2px 0 14px; }
.twin-suggest-chip {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.01em;
  text-align: left; cursor: pointer;
  color: var(--text-muted);
  background: var(--panel-raised);
  border: 1px solid var(--bezel);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
}
.twin-suggest-chip:hover { color: var(--text); border-color: var(--bezel-bright); }

/* — composer — */
.twin-composer { flex: none; padding: 12px 14px 14px; border-top: 1px solid var(--bezel); }
/* Cloudflare Turnstile: zero-size and invisible until (rarely) it needs to
   show an interactive challenge, at which point it renders its own iframe
   chrome — not something this stylesheet can reach into or theme further. */
.twin-turnstile:not(:empty) { margin-bottom: 10px; }
.twin-composer textarea {
  display: block; width: 100%;
  resize: none; max-height: 130px;
  font-family: var(--font-display); font-size: 14.5px; line-height: 1.5;
  color: var(--text);
  background: var(--panel-raised);
  border: 1px solid var(--bezel);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}
.twin-composer textarea::placeholder { color: var(--text-faint); }
.twin-composer-foot {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin-top: 8px;
}
.twin-count { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); }
.twin-count[data-warn] { color: var(--signal-amber); }
.twin-send { padding: 9px 16px; font-size: 11.5px; }
.twin-send:disabled { opacity: 0.4; cursor: not-allowed; }
.twin-send:disabled:hover { color: var(--signal-amber); background: color-mix(in srgb, var(--signal-amber) 6%, transparent); }

/* — screen-reader-only utility (speaker labels, form label) — */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* The global reset above turns the sweep's animation into a 0.01ms strobe;
   hold it lit and static instead of flashing. */
@media (prefers-reduced-motion: reduce) {
  .twin-sweep-cell {
    animation: none !important;
    background: var(--led-on) !important;
  }
}

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

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; }
  .instrument-cluster { order: -1; }
  .exp-log-entry { grid-template-columns: 1fr; gap: var(--space-1); }
}

@media (max-width: 540px) {
  .readout--lg .readout-value { font-size: 56px; }
  .readout-value { font-size: 34px; }
  .readout--sm .readout-value { font-size: 24px; }
  .instrument-cluster-secondary { gap: 24px; }
  .contact-panel { flex-direction: column; }

  .twin-launcher { right: 14px; bottom: 14px; padding: 11px 14px; }
  .twin {
    inset: 8px 8px 8px auto;
    left: 8px;
    width: auto; height: auto;
    border-radius: var(--radius-sm);
  }
}