/* AMPER DIGITAL — Chrome Bay */
:root {
  --void: #050506;
  --void-2: #0a0b0e;
  --void-3: #12141a;
  --chrome: #c8ccd4;
  --chrome-hi: #f2f4f7;
  --mercury: #8a909a;
  --chalk: #e8eaee;
  --muted: #9aa0aa;
  --cyan: #5ce1ff;
  --magenta: #ff4d9a;
  --amber: #ffc857;
  --line: rgba(200, 204, 212, 0.18);
  --glass: rgba(18, 20, 26, 0.72);
  --radius: 4px;
  --shell: min(1120px, calc(100% - 2.5rem));
  --font-display: "Bebas Neue", "Arial Narrow", sans-serif;
  --font-accent: "Instrument Serif", Georgia, serif;
  --font-body: "DM Sans", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.02rem;
  line-height: 1.55;
  color: var(--chalk);
  background:
    radial-gradient(120% 80% at 80% -10%, rgba(92, 225, 255, 0.07), transparent 50%),
    radial-gradient(90% 60% at 10% 20%, rgba(255, 77, 154, 0.05), transparent 45%),
    linear-gradient(180deg, var(--void) 0%, var(--void-2) 45%, #0d0f14 100%);
  min-height: 100vh;
}

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

a {
  color: var(--cyan);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--chrome-hi);
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  background: var(--chrome-hi);
  color: var(--void);
  padding: 0.6rem 1rem;
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(5, 5, 6, 0.78);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.25rem;
}

.svg-defs {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--chalk);
  text-decoration: none;
  font-family: var(--font-display);
  letter-spacing: 0.06em;
  font-size: 1.35rem;
}

.brand-mark {
  position: relative;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.brand img {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: 50%;
  border: 1px solid var(--line);
  position: relative;
  z-index: 1;
  transition: transform 0.35s ease, filter 0.35s ease;
}

.brand-mark-ring {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: conic-gradient(from var(--brand-angle, 0deg), #5ce1ff, #ff4d9a, #ffc857, #5ce1ff);
  opacity: 0.55;
  z-index: 0;
  animation: brand-spin 4s linear infinite;
  mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 1px));
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 1px));
}

.brand:hover img,
.brand:focus-visible img {
  transform: scale(1.08) rotate(-4deg);
  filter: drop-shadow(0 0 12px rgba(92, 225, 255, 0.45));
}

@keyframes brand-spin {
  to {
    transform: rotate(360deg);
  }
}

.brand em {
  font-family: var(--font-accent);
  font-style: italic;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--mercury);
  font-size: 0.85em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.15rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}

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

.nav-cta,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 0.72rem 1.15rem;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.nav-cta,
.btn-chrome {
  background: linear-gradient(135deg, #f4f6fa 0%, #aeb4c0 42%, #e8ebf0 58%, #8e95a2 100%);
  color: #0a0b0e;
  border-color: rgba(255, 255, 255, 0.35);
  box-shadow: 0 0 0 1px rgba(92, 225, 255, 0.15), 0 8px 28px rgba(0, 0, 0, 0.35);
}

.nav-cta:hover,
.btn-chrome:hover {
  color: #000;
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--chalk);
  border-color: var(--line);
}

.btn-ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.55rem 0.9rem;
  font-size: 0.88rem;
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 2px;
  margin: 5px auto;
  background: var(--chalk);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.policy-back {
  color: var(--chalk);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
}

.policy-back:hover {
  color: var(--cyan);
}

/* Hero */
.hero {
  position: relative;
  min-height: min(100vh, 920px);
  display: grid;
  align-items: end;
  overflow: hidden;
  --mx: 55%;
  --my: 40%;
  --amp: 0.42;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: #000;
}

.hero-still {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center 38%;
  transition: transform 0.6s ease-out, filter 0.45s ease;
  will-change: transform;
}

.hero.is-lit .hero-still {
  filter: contrast(1.06) saturate(1.12) brightness(1.04);
  transform: scale(1.02);
}

.hero-spotlight {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background: radial-gradient(
    420px 320px at var(--mx) var(--my),
    rgba(92, 225, 255, 0.16),
    rgba(255, 77, 154, 0.08) 35%,
    transparent 62%
  );
  mix-blend-mode: screen;
  transition: opacity 0.3s ease;
}

.hero-veil {
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(180deg, rgba(5, 5, 6, 0.05) 0%, rgba(5, 5, 6, 0.12) 48%, rgba(5, 5, 6, 0.88) 76%, var(--void) 100%),
    radial-gradient(60% 40% at 70% 20%, rgba(92, 225, 255, 0.06), transparent 60%);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 4;
  padding: 0 0 3.2rem;
  max-width: 38rem;
}

.hero-brand,
h1.hero-brand {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 5.2rem);
  letter-spacing: 0.08em;
  line-height: 0.9;
  font-weight: 400;
  background: linear-gradient(
    110deg,
    #fff 0%,
    #c8ccd4 22%,
    #5ce1ff 38%,
    #f2f4f7 48%,
    #ff4d9a 62%,
    #ffc857 78%,
    #f2f4f7 100%
  );
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: chrome-sheen 5.5s ease-in-out infinite;
  filter: drop-shadow(0 0 28px rgba(92, 225, 255, 0.18));
}

@keyframes chrome-sheen {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.hero-lead {
  margin: 0 0 1.4rem;
  color: var(--muted);
  max-width: 32rem;
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn-chrome {
  position: relative;
  overflow: hidden;
}

.btn-sheen {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 35%, rgba(255, 255, 255, 0.55) 50%, transparent 65%);
  transform: translateX(-120%);
  pointer-events: none;
}

.btn-chrome:hover .btn-sheen,
.btn-chrome:focus-visible .btn-sheen {
  animation: btn-sheen-sweep 0.7s ease;
}

@keyframes btn-sheen-sweep {
  to {
    transform: translateX(120%);
  }
}

/* Prism streaks */
.prism-streak {
  position: absolute;
  height: 2px;
  pointer-events: none;
  z-index: 2;
  opacity: 0.55;
  background: linear-gradient(90deg, transparent, rgba(92, 225, 255, 0.55), rgba(255, 77, 154, 0.45), rgba(255, 200, 87, 0.4), transparent);
}

.prism-a {
  inset: 14% -8% auto auto;
  width: 58%;
  transform: rotate(-18deg);
  animation: streak-pulse 5.5s ease-in-out infinite;
}

.prism-b {
  inset: auto auto 38% -12%;
  width: 48%;
  transform: rotate(12deg);
  animation: streak-pulse 7s ease-in-out infinite 1s;
  opacity: 0.4;
}

.prism-c {
  inset: 42% 5% auto auto;
  width: 36%;
  height: 1px;
  transform: rotate(-8deg);
  animation: streak-drift 9s ease-in-out infinite;
}

@keyframes streak-pulse {
  0%,
  100% {
    opacity: 0.28;
  }
  50% {
    opacity: 0.75;
  }
}

@keyframes streak-drift {
  0%,
  100% {
    transform: rotate(-8deg) translateX(0);
    opacity: 0.25;
  }
  50% {
    transform: rotate(-8deg) translateX(40px);
    opacity: 0.65;
  }
}

/* Floating mercury blobs */
.mercury-field {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  overflow: hidden;
}

.mercury-blob {
  position: absolute;
  border-radius: 50% 42% 55% 48%;
  background:
    radial-gradient(circle at 30% 28%, #fff 0%, #c8ccd4 22%, #5ce1ff 45%, #8a909a 70%, #1a1c22 100%);
  box-shadow:
    0 0 24px rgba(92, 225, 255, 0.25),
    inset -6px -8px 16px rgba(0, 0, 0, 0.45);
  opacity: 0.55;
  filter: blur(0.2px);
  animation: blob-float 9s ease-in-out infinite;
}

.mercury-blob.b1 {
  width: 28px;
  height: 34px;
  left: 12%;
  top: 22%;
  animation-duration: 8s;
}

.mercury-blob.b2 {
  width: 18px;
  height: 22px;
  right: 18%;
  top: 28%;
  animation-duration: 11s;
  animation-delay: -2s;
  opacity: 0.4;
}

.mercury-blob.b3 {
  width: 42px;
  height: 36px;
  left: 22%;
  bottom: 28%;
  animation-duration: 10s;
  animation-delay: -4s;
  border-radius: 48% 55% 42% 58%;
}

.mercury-blob.b4 {
  width: 14px;
  height: 16px;
  right: 28%;
  bottom: 36%;
  animation-duration: 7s;
  animation-delay: -1s;
  opacity: 0.5;
}

@keyframes blob-float {
  0%,
  100% {
    transform: translate(0, 0) scale(1) rotate(0deg);
  }
  33% {
    transform: translate(12px, -18px) scale(1.08) rotate(8deg);
  }
  66% {
    transform: translate(-10px, 10px) scale(0.94) rotate(-6deg);
  }
}

/* Chrome marquee — seamless loop, vertically centered in its strip */
.chrome-marquee {
  display: flex;
  align-items: center;
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(92, 225, 255, 0.06), rgba(5, 5, 6, 0.9), rgba(255, 77, 154, 0.06));
  height: 2.75rem;
  position: relative;
  mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
}

.chrome-marquee-track {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  gap: 2.5rem;
  width: max-content;
  min-width: 200%;
  padding-inline: 0;
  animation: marquee 40s linear infinite;
  font-family: var(--font-display);
  letter-spacing: 0.14em;
  font-size: 0.95rem;
  line-height: 1;
  color: var(--mercury);
  white-space: nowrap;
}

.chrome-marquee-track span {
  flex-shrink: 0;
}

.chrome-marquee-track span:nth-child(odd) {
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

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

/* Chapters */
.chapter {
  margin: 0 0 0.55rem;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mercury);
  font-weight: 600;
}

section h2 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3rem);
  letter-spacing: 0.04em;
  line-height: 1.05;
  font-weight: 400;
}

.section-lead {
  margin: 0 0 1.75rem;
  color: var(--muted);
  max-width: 40rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .prism-streak,
  .mercury-blob,
  .hero-brand,
  .brand-mark-ring,
  .chrome-marquee-track {
    animation: none !important;
  }
  .hero-spotlight {
    display: none;
  }
}

/* Bay notes */
.bay-notes {
  padding: 5rem 0 4rem;
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 0.5rem;
}

.notes-grid article {
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--line);
}

.notes-grid h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: 0.05em;
  font-weight: 400;
}

.notes-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.notes-visual {
  margin-top: 2.5rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  max-height: 320px;
}

.notes-visual img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  object-position: center;
}

/* Course folders */
.course-bay {
  padding: 4rem 0 5rem;
  background:
    linear-gradient(180deg, transparent, rgba(18, 20, 26, 0.65) 8%, rgba(18, 20, 26, 0.4) 100%);
}

.bay-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.25rem;
  align-items: end;
  margin-bottom: 1.75rem;
}

.filter-dock {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.filter-chip {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  padding: 0.45rem 0.85rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.filter-chip.is-active,
.filter-chip:hover {
  color: var(--void);
  background: linear-gradient(135deg, var(--chrome-hi), var(--chrome));
  border-color: transparent;
}

.folder-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.folder-row {
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(20, 22, 28, 0.9), rgba(10, 11, 14, 0.95));
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.folder-row.is-open {
  border-color: rgba(92, 225, 255, 0.45);
  box-shadow: 0 0 0 1px rgba(255, 77, 154, 0.12), 0 18px 40px rgba(0, 0, 0, 0.35);
}

.folder-row.is-hidden {
  display: none;
}

.folder-trigger {
  width: 100%;
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.15rem;
  background: transparent;
  border: 0;
  color: inherit;
  text-align: left;
  cursor: pointer;
  font: inherit;
}

.folder-trigger:hover .folder-icon,
.folder-row.is-open .folder-icon {
  animation: folder-shake 0.55s ease;
}

.folder-icon {
  width: 64px;
  height: 64px;
  border-radius: 6px;
  object-fit: cover;
  border: 1px solid var(--line);
  transform-origin: 50% 70%;
}

@keyframes folder-shake {
  0%,
  100% {
    transform: rotate(0deg) translateX(0);
  }
  15% {
    transform: rotate(-8deg) translateX(-2px);
  }
  30% {
    transform: rotate(7deg) translateX(2px);
  }
  45% {
    transform: rotate(-6deg) translateX(-1px);
  }
  60% {
    transform: rotate(5deg) translateX(1px);
  }
  75% {
    transform: rotate(-3deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .folder-trigger:hover .folder-icon,
  .folder-row.is-open .folder-icon {
    animation: none;
  }
}

.folder-meta h3 {
  margin: 0 0 0.25rem;
  font-family: var(--font-display);
  font-size: 1.55rem;
  letter-spacing: 0.04em;
  font-weight: 400;
}

.folder-meta .lane-tag {
  display: inline-block;
  margin-bottom: 0.35rem;
}

.folder-meta .scope {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.folder-price {
  text-align: right;
  min-width: 5.5rem;
}

.folder-price strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  letter-spacing: 0.04em;
  font-weight: 400;
  background: linear-gradient(120deg, #fff, var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.folder-price span {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.folder-panel {
  display: none;
  padding: 0 1.15rem 1.25rem 1.15rem;
  border-top: 1px solid var(--line);
}

.folder-row.is-open .folder-panel {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.25rem;
  padding-top: 1.15rem;
}

.folder-panel h4 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  letter-spacing: 0.06em;
  font-size: 1.15rem;
  font-weight: 400;
}

.folder-panel ul {
  margin: 0 0 0.85rem;
  padding-left: 1.1rem;
  color: var(--muted);
}

.folder-panel li {
  margin-bottom: 0.35rem;
}

.boundary {
  margin: 0;
  font-size: 0.9rem;
  color: var(--mercury);
}

.pack-bay {
  position: relative;
  padding: 1rem;
  border: 1px dashed rgba(92, 225, 255, 0.35);
  border-radius: var(--radius);
  background:
    radial-gradient(80% 80% at 20% 0%, rgba(255, 77, 154, 0.08), transparent 55%),
    rgba(8, 9, 12, 0.85);
}

.pack-bay-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.pack-bay-head img {
  width: 48px;
  height: 48px;
  border-radius: 4px;
  object-fit: cover;
  animation: folder-shake 0.7s ease;
}

.pack-bay.is-rattling .pack-bay-head img {
  animation: folder-shake 0.55s ease;
}

.pack-label {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  font-weight: 700;
}

.pack-bay ul {
  margin: 0;
  padding-left: 1.05rem;
  color: var(--chalk);
  font-size: 0.92rem;
}

.folder-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.85rem;
}

.lane-tag {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--magenta);
  font-weight: 700;
}

/* Amp Stack */
.amp-stack {
  padding: 4.5rem 0;
}

.stack-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.lane-board {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.lane-btn {
  border: 1px solid var(--line);
  background: var(--void-3);
  color: var(--chalk);
  border-radius: var(--radius);
  padding: 0.7rem 0.95rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.lane-btn.is-on {
  border-color: rgba(92, 225, 255, 0.55);
  background: linear-gradient(135deg, rgba(92, 225, 255, 0.15), rgba(255, 77, 154, 0.12));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.stack-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  background: rgba(10, 11, 14, 0.8);
  min-height: 220px;
}

.stack-panel ol {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
}

.stack-panel li {
  margin-bottom: 0.45rem;
}

.stack-total {
  font-family: var(--font-display);
  font-size: 2rem;
  letter-spacing: 0.04em;
  margin: 0 0 0.75rem;
}

.stack-hint {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

/* Kits */
.kits {
  padding: 4rem 0 5rem;
  border-top: 1px solid var(--line);
}

.kit-rail {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.kit-item {
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(24, 26, 34, 0.9), rgba(8, 9, 12, 0.95));
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.kit-item:hover {
  border-color: rgba(92, 225, 255, 0.4);
  transform: translateY(-3px);
  color: inherit;
}

.kit-item h3 {
  margin: 0.35rem 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: 0.04em;
  font-weight: 400;
}

.kit-item p {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.kit-item .price {
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 0.04em;
  color: var(--chrome-hi);
}

/* FAQ */
.faq {
  padding: 4rem 0 5rem;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  max-width: 46rem;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(10, 11, 14, 0.65);
}

.faq-item summary {
  cursor: pointer;
  padding: 1rem 1.1rem;
  font-weight: 600;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item[open] summary {
  color: var(--cyan);
}

.faq-item p {
  margin: 0;
  padding: 0 1.1rem 1.1rem;
  color: var(--muted);
}

/* Desk / contact */
.desk {
  padding: 4.5rem 0 5.5rem;
  background:
    radial-gradient(70% 60% at 85% 0%, rgba(92, 225, 255, 0.08), transparent 50%),
    linear-gradient(180deg, transparent, rgba(12, 14, 18, 0.9));
}

.desk-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2rem;
  align-items: start;
}

.desk-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  background: rgba(10, 11, 14, 0.75);
}

.desk-card p {
  margin: 0 0 0.55rem;
  color: var(--muted);
}

.desk-card a {
  color: var(--chalk);
}

.contact-form {
  display: grid;
  gap: 0.85rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--mercury);
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(5, 5, 6, 0.85);
  color: var(--chalk);
  padding: 0.7rem 0.8rem;
  font: inherit;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(92, 225, 255, 0.45);
  outline-offset: 1px;
  border-color: rgba(92, 225, 255, 0.55);
}

.checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  font-weight: 500;
  color: var(--muted);
}

.checkbox input {
  width: auto;
  margin-top: 0.25rem;
}

.form-status {
  margin: 0;
  min-height: 1.3em;
  font-size: 0.92rem;
}

.form-status.is-ok {
  color: var(--cyan);
}

.form-status.is-err {
  color: #ff7a9a;
}

.honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
  overflow: hidden;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.5rem 0 2rem;
  background: #040405;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.5rem;
}

.footer-brand {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.footer-brand img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.footer-brand strong {
  display: block;
  font-family: var(--font-display);
  letter-spacing: 0.06em;
  font-size: 1.25rem;
  font-weight: 400;
}

.footer-industry {
  margin: 0.15rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.1rem;
  justify-content: flex-end;
  align-content: start;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--cyan);
}

.footer-copy {
  grid-column: 1 / -1;
  margin: 0.5rem 0 0;
  color: var(--mercury);
  font-size: 0.85rem;
}

/* Legal / product */
.legal-hero,
.product-page {
  padding: 3rem 0 2rem;
}

.legal-body {
  padding-bottom: 4rem;
  max-width: 46rem;
}

.legal-body h2 {
  margin-top: 2rem;
  font-size: 1.55rem;
}

.legal-body p,
.legal-body li {
  color: var(--muted);
}

.product-layout {
  padding-bottom: 4rem;
}

.product-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.25rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.product-crumb a {
  color: var(--muted);
  text-decoration: none;
}

.product-crumb a:hover {
  color: var(--cyan);
}

.product-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.product-media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
}

.product-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.product-media figcaption {
  padding: 0.65rem 0.85rem;
  font-size: 0.82rem;
  color: var(--mercury);
  border-top: 1px solid var(--line);
}

.product-copy h1 {
  margin: 0.35rem 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  letter-spacing: 0.04em;
  font-weight: 400;
  line-height: 1.05;
}

.product-price span {
  font-family: var(--font-display);
  font-size: 2.4rem;
  letter-spacing: 0.04em;
  background: linear-gradient(120deg, #fff, var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 1.1rem 0 0.75rem;
}

.product-note {
  color: var(--muted);
  font-size: 0.9rem;
}

.product-pack {
  margin-top: 1.25rem;
}

/* Responsive */
@media (max-width: 900px) {
  .notes-grid,
  .kit-rail,
  .desk-grid,
  .stack-grid,
  .product-grid,
  .folder-row.is-open .folder-panel {
    grid-template-columns: 1fr;
  }

  .folder-trigger {
    grid-template-columns: 56px 1fr;
  }

  .folder-price {
    grid-column: 2;
    text-align: left;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 760px) {
  :root {
    --shell: min(1120px, calc(100% - 1.5rem));
  }

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

  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem 1rem 1rem;
    background: rgba(5, 5, 6, 0.96);
    border-bottom: 1px solid var(--line);
  }

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

  .site-nav a {
    padding: 0.7rem 0.25rem;
    border-bottom: 1px solid var(--line);
  }

  .nav-cta {
    margin-top: 0.5rem;
    text-align: center;
  }

  .hero {
    min-height: 78vh;
  }

  .hero-still {
    object-position: center 30%;
  }

  .hero-brand {
    font-size: clamp(2.2rem, 11vw, 3.4rem);
  }

  .mercury-blob.b3 {
    display: none;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}