:root {
  --abyss: #041018;
  --deep: #071e2e;
  --ocean: #0c3048;
  --ocean-light: #164a6a;
  --cyan: #5ee7ff;
  --teal: #7dffda;
  --foam: #f4faff;
  --mist: #cfe1ec;
  --muted: #a8c0d0;
  --glass: rgba(10, 30, 48, 0.65);
  --glass-border: rgba(94, 231, 255, 0.16);
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  --font-display: "Plus Jakarta Sans", system-ui, sans-serif;
  --font-body: "Plus Jakarta Sans", system-ui, sans-serif;
  --header-h: 76px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.72;
  letter-spacing: 0.01em;
  color: var(--foam);
  background: var(--abyss);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin: 0; }

/* Keyboard accessibility */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 9999;
  padding: 0.65rem 1.1rem;
  border-radius: 0 0 10px 10px;
  background: var(--cyan);
  color: #043042;
  font-weight: 600;
  transition: top 0.2s var(--ease-out);
}
.skip-link:focus { top: 0; }

.container {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.container.narrow { width: min(760px, calc(100% - 48px)); }

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  opacity: 0.022;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.cursor-glow {
  position: fixed;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(circle, rgba(94, 231, 255, 0.06) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
  opacity: 0;
}

body:hover .cursor-glow { opacity: 1; }

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1rem;
}

.gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, var(--mist) 40%, var(--cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.muted { color: var(--muted); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.badge-soon {
  color: var(--cyan);
  background: rgba(94, 231, 255, 0.1);
  border: 1px solid rgba(94, 231, 255, 0.22);
  box-shadow: 0 0 24px rgba(94, 231, 255, 0.08);
}

.hero-content > .badge-soon {
  margin-bottom: 0.75rem;
}

.mobile-menu .badge-soon {
  align-self: flex-start;
  margin-top: 0.5rem;
}

kbd {
  display: inline-block;
  padding: 0.15em 0.5em;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.06);
  font-family: inherit;
  font-size: 0.85em;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  border: none;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s, background 0.25s, border-color 0.25s;
}

.btn:active { transform: scale(0.97); }

.btn-sm { padding: 0.65rem 1.25rem; font-size: 0.9rem; }
.btn-lg { padding: 1rem 1.75rem; font-size: 1rem; }

.btn-primary {
  color: #043042;
  background: linear-gradient(135deg, #b8fff0, var(--cyan));
  box-shadow: 0 0 0 1px rgba(125, 255, 218, 0.2), 0 10px 32px rgba(94, 231, 255, 0.22);
}

.btn-primary:hover {
  box-shadow: 0 0 0 1px rgba(125, 255, 218, 0.35), 0 14px 40px rgba(94, 231, 255, 0.3);
  transform: translateY(-2px);
}

.btn-ghost {
  color: var(--foam);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 212, 255, 0.35);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  transition: background 0.35s, border-color 0.35s;
}

.site-header.scrolled {
  background: rgba(2, 8, 16, 0.82);
  border-bottom: 1px solid var(--glass-border);
}

.site-header.scrolled::before {
  content: "";
  position: absolute;
  inset: 0;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  pointer-events: none;
  z-index: -1;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 48px));
  height: 100%;
  margin-inline: auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--ocean-light), var(--deep));
  border: 1px solid var(--glass-border);
  box-shadow: inset 0 0 20px rgba(0, 212, 255, 0.15);
  position: relative;
}

.logo-mark::after {
  content: "";
  position: absolute;
  inset: 8px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--cyan), transparent 70%);
  opacity: 0.7;
}

.logo-text span { color: var(--cyan); }

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 400;
  color: var(--muted);
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--foam); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--foam);
  border-radius: 2px;
}

.mobile-menu {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: rgba(2, 8, 16, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 2rem;
  flex-direction: column;
  gap: 1.25rem;
  z-index: 99;
}

.mobile-menu[hidden] {
  display: none !important;
}

.mobile-menu:not([hidden]) {
  display: flex;
}

.mobile-menu a { font-size: 1.1rem; }

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 2rem;
  padding: calc(var(--header-h) + 3rem) 24px 4rem;
  max-width: 1280px;
  margin-inline: auto;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  opacity: 0.22;
  filter: saturate(0.65) blur(2px) brightness(0.85);
  transform: scale(1.06);
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(94, 231, 255, 0.14), transparent),
    radial-gradient(ellipse 60% 50% at 20% 80%, rgba(125, 255, 218, 0.08), transparent),
    radial-gradient(ellipse 50% 40% at 50% 100%, rgba(200, 220, 232, 0.04), transparent),
    linear-gradient(180deg, var(--deep) 0%, var(--abyss) 100%);
}

.hero-caustics {
  position: absolute;
  inset: -20%;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='600' height='600'%3E%3Cfilter id='c'%3E%3CfeTurbulence type='turbulence' baseFrequency='0.015' numOctaves='3'/%3E%3CfeColorMatrix values='0 0 0 0 0.9 0 0 0 0 0.95 0 0 0 0 1 0 0 0 0.06 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23c)'/%3E%3C/svg%3E");
  opacity: 0.45;
  animation: caustics-drift 18s ease-in-out infinite alternate;
}

@keyframes caustics-drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-3%, 2%) scale(1.05); }
}

#particle-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 30%, var(--abyss) 100%);
}

.hero-content { padding-left: 24px; z-index: 1; }

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.025em;
  margin-bottom: 1.25rem;
}

.hero-lede {
  max-width: 34rem;
  color: var(--mist);
  font-size: 1.12rem;
  font-weight: 300;
  line-height: 1.75;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-stats dt {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.25rem;
}

.hero-stats dd {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--muted);
}

.hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 380px;
  z-index: 1;
}

/* Interactive 3D ROV */
.rov-viewer {
  width: 100%;
  height: min(460px, 60vh);
  background: transparent;
  --poster-color: transparent;
  --progress-bar-color: var(--cyan);
  --progress-mask: transparent;
  border-radius: var(--radius-lg);
  cursor: grab;
  outline: none;
}

.rov-viewer:active { cursor: grabbing; }

.rov-fallback {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.rov-caption {
  margin-top: 0.85rem;
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--muted);
  text-align: center;
}

.rov-drag-hint {
  color: var(--cyan);
  font-weight: 500;
}

/* Preview gallery */
.preview-gallery {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 1.25rem;
  align-items: start;
}

.preview-frame {
  margin: 0;
}

.preview-frame-inner {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--deep);
  aspect-ratio: 16 / 10;
}

.preview-frame-featured .preview-frame-inner {
  aspect-ratio: 16 / 11;
}

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

.preview-frame-soft img {
  filter: saturate(0.75) brightness(0.92);
  object-position: center 40%;
}

.preview-frame-inner.preview-frame-dev::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(4, 16, 24, 0.15), rgba(4, 16, 24, 0.55));
  pointer-events: none;
}

.preview-frame-dev img {
  filter: saturate(0.4) brightness(0.7) blur(1px);
  object-position: center;
  transform: scale(1.08);
}

.preview-frame figcaption {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--muted);
  text-align: center;
}

/* Photo panel in mission section */
.panel-screen-photo {
  position: relative;
  background: var(--deep);
}

.panel-screen-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  filter: saturate(0.9);
}

.panel-screen-fade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(4, 16, 24, 0.5));
  pointer-events: none;
}

.panel-wip-tag {
  position: absolute;
  top: 1rem;
  left: 1rem;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
  background: rgba(4, 16, 24, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  animation: bounce 2s ease infinite;
  z-index: 1;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* Sticky CTA */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  transform: translateY(110%);
  transition: transform 0.4s var(--ease-out);
  pointer-events: none;
}

.sticky-cta.visible {
  transform: translateY(0);
  pointer-events: auto;
}

.sticky-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto 16px;
  padding: 0.85rem 1.25rem;
  border-radius: 999px;
  background: rgba(5, 21, 37, 0.92);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
}

.sticky-cta strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 500;
}
.sticky-cta span { font-size: 0.85rem; color: var(--muted); }

/* Sections */
.section {
  padding: 7rem 0;
  position: relative;
}

.section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(900px, 80%);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.25), transparent);
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.5rem;
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.5vw, 2.75rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.section-sub {
  color: var(--muted);
  font-weight: 300;
  line-height: 1.75;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.split.reverse .split-copy { order: 2; }
.split.reverse .controls-visual { order: 1; }

.split-copy h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.18;
  margin-bottom: 1rem;
}

.split-copy p {
  color: var(--muted);
  font-weight: 300;
  line-height: 1.75;
  margin-bottom: 1rem;
}

.check-list { margin-top: 1.5rem; }

.check-list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--muted);
  font-weight: 300;
  line-height: 1.65;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--cyan));
  box-shadow: 0 0 10px rgba(94, 231, 255, 0.4);
}

/* Mission panel */
.mission-panel { perspective: 1000px; }

.panel-frame {
  border-radius: var(--radius-lg);
  padding: 12px;
  background: linear-gradient(145deg, rgba(0, 212, 255, 0.12), rgba(0, 255, 200, 0.04));
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  transform: rotateY(-8deg) rotateX(4deg);
  transition: transform 0.5s var(--ease-out);
}

.mission-panel:hover .panel-frame {
  transform: rotateY(0) rotateX(0);
}

.panel-screen {
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: calc(var(--radius-lg) - 8px);
  overflow: hidden;
  background: var(--deep);
}

.panel-caption {
  text-align: center;
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Features */
.features { background: linear-gradient(180deg, transparent, rgba(5, 21, 37, 0.5), transparent); }

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

.feature-card {
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: transform 0.35s var(--ease-out), border-color 0.35s, box-shadow 0.35s;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--glass-border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.feature-icon {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 500;
  color: rgba(94, 231, 255, 0.35);
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: 0.65rem;
}

.feature-card p {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 1.65;
}

/* ROV class specs */
.spec-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.spec-card {
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.spec-card.highlight {
  background: linear-gradient(160deg, rgba(0, 212, 255, 0.1), rgba(0, 255, 200, 0.04));
  border-color: var(--glass-border);
}

.spec-card h3 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: 1.25rem;
}

.spec-card li {
  position: relative;
  padding-left: 1rem;
  margin-bottom: 0.85rem;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 1.6;
}

.spec-card li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--cyan);
}

.spec-card strong { color: var(--foam); }

/* Controls */
.stick-layout {
  display: flex;
  gap: 2rem;
  justify-content: center;
}

.stick-block {
  text-align: center;
}

.stick-label {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1rem;
}

.stick-ring {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 2px solid rgba(0, 212, 255, 0.25);
  background: radial-gradient(circle, rgba(0, 212, 255, 0.08), transparent);
  position: relative;
  margin-bottom: 1rem;
}

.stick-dot {
  position: absolute;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--cyan));
  top: 35%;
  left: 60%;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.6);
  animation: stick-move 4s ease-in-out infinite;
}

.stick-dot-alt { animation-delay: -2s; top: 55%; left: 40%; }

@keyframes stick-move {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(-18px, 8px); }
  50% { transform: translate(12px, -14px); }
  75% { transform: translate(20px, 10px); }
}

.stick-axis { font-size: 0.85rem; color: var(--muted); }

/* Follow / launch card */
.follow-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  padding: 3rem;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(ellipse at top right, rgba(0, 212, 255, 0.12), transparent 55%),
    linear-gradient(160deg, rgba(5, 21, 37, 0.95), rgba(2, 8, 16, 0.98));
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
}

.follow-copy h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.follow-copy p {
  color: var(--muted);
  font-weight: 300;
  line-height: 1.7;
}

.follow-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.platform-note {
  margin: 0.5rem 0 0;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.platform-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.platform-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  font-size: 0.88rem;
  color: var(--mist);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.platform-chip svg { opacity: 0.8; }

.follow-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

/* FAQ */
.faq-list details {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 1.25rem 0;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 500;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

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

.faq-list summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--cyan);
  transition: transform 0.25s;
  flex-shrink: 0;
}

.faq-list details[open] summary::after { transform: rotate(45deg); }

.faq-list p {
  margin-top: 0.85rem;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 1.7;
}

.faq-list a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Footer */
.site-footer {
  padding: 3rem 0 4rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
}

.footer-inner p { color: var(--muted); font-size: 0.92rem; }

.footer-links {
  display: flex;
  gap: 1.5rem;
  margin: 0.25rem 0;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--mist);
  transition: color 0.2s;
}

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

.footer-copy { font-size: 0.82rem !important; opacity: 0.7; }

/* Reveal animations — only hidden when JS is available to reveal them.
   Without JS (or if JS errors before setup) content stays fully visible. */
.reveal {
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

html.js .reveal {
  opacity: 0;
  transform: translateY(28px);
}

html.js .reveal.visible {
  opacity: 1;
  transform: none;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: calc(var(--header-h) + 2rem);
  }

  .hero-content { padding-left: 0; }
  .hero-content > .badge-soon { margin-inline: auto; }
  .hero-lede { margin-inline: auto; }
  .hero-actions { justify-content: center; }
  .hero-stats { max-width: 520px; margin-inline: auto; }
  .hero-visual { min-height: 320px; margin-top: 1rem; order: -1; }
  .rov-viewer { height: min(380px, 52vh); }
  .scroll-hint { display: none; }

  .preview-gallery { grid-template-columns: 1fr; }
  .preview-frame-featured .preview-frame-inner { aspect-ratio: 16 / 10; }

  .split, .split.reverse { grid-template-columns: 1fr; gap: 2.5rem; }
  .split.reverse .split-copy, .split.reverse .controls-visual { order: unset; }

  .feature-grid, .spec-grid { grid-template-columns: 1fr 1fr; }
  .follow-card { grid-template-columns: 1fr; }
}

@media (min-width: 769px) {
  .mobile-menu {
    display: none !important;
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }

  .hero-stats { grid-template-columns: 1fr; text-align: left; }
  .feature-grid, .spec-grid { grid-template-columns: 1fr; }
  .stick-layout { flex-direction: column; align-items: center; }
  .sticky-cta-inner { border-radius: var(--radius); flex-wrap: wrap; justify-content: center; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  html.js .reveal { opacity: 1; transform: none; }
}