:root {
  --bg-deep: #030917;
  --bg-navy: #071226;
  --ink: #f4f8ff;
  --muted: #9eb3d0;
  --cyan: #05affc;
  --cyan-bright: #5ce1ff;
  --cyan-deep: #0279ba;
  --glass-bg: rgba(10, 22, 46, 0.56);
  --glass-bg-strong: rgba(8, 18, 38, 0.74);
  --glass-edge: rgba(155, 220, 255, 0.16);
  --glass-highlight: rgba(255, 255, 255, 0.14);
  --max-w: 1200px;
  --radius-card: 22px;
  --radius-pill: 999px;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-deep);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Heebo", "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(62rem 42rem at 18% 18%, rgba(5, 175, 252, 0.11), transparent 64%),
    radial-gradient(54rem 38rem at 82% 8%, rgba(16, 62, 138, 0.24), transparent 62%),
    radial-gradient(46rem 34rem at 76% 72%, rgba(5, 175, 252, 0.08), transparent 64%),
    linear-gradient(180deg, #020712 0%, #050d20 52%, #030917 100%);
  background-attachment: fixed;
  overflow-x: clip;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.wrap {
  width: min(calc(100% - 56px), var(--max-w));
  margin-inline: auto;
}

/* Fixed WebGL2 Bubble Stage */
#bubble-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

/* Fallback static bubble when WebGL2 is unavailable or reduced-motion is preferred */
.bubble-fallback {
  position: fixed;
  top: 43%;
  left: 25%;
  width: min(45vh, 42vw);
  height: min(45vh, 42vw);
  max-height: 58vh;
  max-width: 58vh;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
  display: none;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 30% 24%, rgba(255, 255, 255, 0.26), rgba(92, 225, 255, 0.12) 28%, rgba(5, 24, 58, 0.56) 68%, rgba(5, 175, 252, 0.28) 94%, rgba(255, 255, 255, 0.24) 100%);
  border: 1px solid rgba(155, 225, 255, 0.34);
  box-shadow:
    inset 0 2px 18px rgba(255, 255, 255, 0.22),
    inset 0 -18px 34px rgba(5, 175, 252, 0.22),
    0 24px 64px rgba(2, 10, 28, 0.72),
    0 0 56px rgba(5, 175, 252, 0.14);
  backdrop-filter: blur(12px);
}

.bubble-fallback img {
  width: 66%;
  height: auto;
  filter: drop-shadow(0 6px 14px rgba(0, 12, 32, 0.45));
}

body.use-fallback #bubble-canvas {
  display: none;
}

body.use-fallback .bubble-fallback {
  display: flex;
}

/* Keep all interactive and textual layers cleanly above the bubble */
header,
main,
footer {
  position: relative;
  z-index: 4;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(3, 9, 23, 0.68);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border-bottom: 1px solid rgba(155, 220, 255, 0.10);
}

header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-logo {
  height: 44px;
  width: auto;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 0.96rem;
  font-weight: 500;
  color: var(--muted);
  transition: color 0.18s ease;
}

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

.nav-cta {
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  background: rgba(5, 175, 252, 0.14);
  border: 1px solid rgba(92, 225, 255, 0.34);
  color: var(--ink) !important;
  font-weight: 600 !important;
  white-space: nowrap;
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.nav-cta:hover,
.nav-cta:focus-visible {
  background: rgba(5, 175, 252, 0.24);
  border-color: rgba(92, 225, 255, 0.56);
  transform: translateY(-1px);
}

/* Frosted Glass Surface */
.glass-card {
  background: linear-gradient(155deg, rgba(16, 35, 68, 0.62), rgba(6, 15, 34, 0.72));
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  border: 1px solid rgba(155, 225, 255, 0.21);
  border-radius: var(--radius-card);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.19),
    inset 0 0 0 1px rgba(5, 175, 252, 0.05),
    0 22px 46px rgba(1, 6, 18, 0.48);
}

/* Buttons */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 26px;
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.22s ease, background 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #27c8ff 0%, #05affc 52%, #0284c7 100%);
  color: #020814;
  border: 1px solid rgba(190, 244, 255, 0.52);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.45),
    0 10px 28px rgba(5, 175, 252, 0.28);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.55),
    0 14px 34px rgba(5, 175, 252, 0.40);
}

.btn-secondary {
  background: rgba(14, 28, 56, 0.58);
  color: var(--ink);
  border: 1px solid var(--glass-edge);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: inset 0 1px 0 var(--glass-highlight);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: rgba(20, 40, 78, 0.72);
  border-color: rgba(92, 225, 255, 0.42);
  transform: translateY(-2px);
}

.btn svg {
  width: 19px;
  height: 19px;
  flex-shrink: 0;
}

/* Section Layout with Dedicated Bubble Lanes on Desktop */
.hero {
  min-height: calc(100vh - 76px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: 56px;
  padding-block: 48px 72px;
}

.hero-copy {
  max-width: 580px;
}

h1 {
  margin: 0 0 20px;
  font-size: clamp(2.55rem, 4.4vw, 4.1rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.lead {
  margin: 0 0 32px;
  font-size: clamp(1.08rem, 1.35vw, 1.24rem);
  line-height: 1.75;
  color: #c5d4e9;
  max-width: 52ch;
}

.bubble-lane {
  min-height: 46vh;
  pointer-events: none;
}

/* Sections */
section {
  padding-block: 88px;
}

.section-split-right {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(320px, 1fr);
  gap: 52px;
  align-items: center;
}

.section-split-left {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(0, 1.55fr);
  gap: 52px;
  align-items: center;
}

.section-head {
  margin-bottom: 28px;
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(1.9rem, 3vw, 2.7rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.015em;
}

.section-head p {
  margin: 0;
  font-size: 1.06rem;
  color: var(--muted);
  max-width: 52ch;
}

/* Capabilities Grid (2x2 in dedicated lane) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  padding: 26px 24px;
}

.feature-icon {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  background: rgba(5, 175, 252, 0.13);
  border: 1px solid rgba(92, 225, 255, 0.24);
  color: var(--cyan-bright);
}

.feature-icon svg {
  width: 21px;
  height: 21px;
}

.feature-card h3,
.principle-card h3 {
  margin: 0 0 8px;
  font-size: 1.22rem;
  font-weight: 700;
  line-height: 1.3;
}

.feature-card p,
.principle-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.65;
}

/* Principles Stack (in opposite lane on desktop) */
.principles-list {
  display: grid;
  gap: 16px;
}

.principle-card {
  padding: 24px 26px;
}

/* Download CTA */
.cta-section {
  padding-block: 72px 104px;
}

.cta-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.95fr);
  gap: 48px;
  align-items: center;
}

.cta-card {
  padding: 40px 38px;
}

.cta-card h2 {
  margin: 0 0 12px;
  font-size: clamp(1.8rem, 2.7vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
}

.cta-card p {
  margin: 0 0 28px;
  color: #c5d4e9;
  font-size: 1.06rem;
}

/* Footer */
footer {
  border-top: 1px solid rgba(155, 220, 255, 0.11);
  background: rgba(2, 7, 18, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 36px;
  padding-block: 26px;
  color: var(--muted);
  font-size: 0.94rem;
}

.foot-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.foot-links a {
  transition: color 0.18s ease;
}

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

/* Compact Corner Glass Bubble Studio Controls */
.studio-panel {
  position: fixed;
  left: 18px;
  bottom: 18px;
  z-index: 25;
  width: 294px;
  background: rgba(6, 15, 34, 0.78);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  border: 1px solid rgba(155, 220, 255, 0.22);
  border-radius: 18px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.16),
    0 16px 36px rgba(1, 6, 18, 0.62);
  color: var(--ink);
  font-size: 0.78rem;
  overflow: hidden;
  transition: width 0.22s ease;
}

.studio-panel.is-collapsed {
  width: auto;
}

.studio-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 12px;
  border-bottom: 1px solid rgba(155, 220, 255, 0.11);
}

.studio-panel.is-collapsed .studio-panel-head {
  border-bottom: none;
}

.studio-panel-title {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-weight: 700;
  font-size: 0.80rem;
}

.studio-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(5, 175, 252, 0.85);
}

.studio-toggle {
  appearance: none;
  border: 1px solid rgba(155, 220, 255, 0.18);
  background: rgba(255, 255, 255, 0.05);
  color: var(--muted);
  border-radius: 999px;
  padding: 3px 9px;
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
}

.studio-toggle:hover {
  color: var(--ink);
  border-color: rgba(92, 225, 255, 0.42);
}

.studio-panel-body {
  padding: 9px 12px 11px;
  display: grid;
  gap: 8px;
}

.studio-panel.is-collapsed .studio-panel-body {
  display: none;
}

.preset-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
}

.preset-btn {
  appearance: none;
  border: 1px solid rgba(155, 220, 255, 0.14);
  background: rgba(14, 30, 62, 0.56);
  color: var(--muted);
  border-radius: 9px;
  padding: 5px 4px;
  font-family: inherit;
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.preset-btn.active {
  background: rgba(5, 175, 252, 0.24);
  border-color: rgba(92, 225, 255, 0.65);
  color: var(--ink);
}

.control-group-label {
  font-size: 0.70rem;
  font-weight: 700;
  color: #7ea4cf;
  margin-top: 1px;
}

.studio-sliders {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 16px;
}

.slider-row {
  display: grid;
  gap: 3px;
}

.slider-row.slider-wide {
  grid-column: 1 / -1;
}

.slider-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 4px;
  font-size: 0.71rem;
  color: #c5d4e9;
}

.slider-val {
  color: var(--cyan-bright);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: 0.68rem;
  direction: ltr;
  unicode-bidi: isolate;
  background: rgba(5, 175, 252, 0.11);
  padding: 1px 5px;
  border-radius: 5px;
}

.slider-row input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 999px;
  background: rgba(155, 220, 255, 0.16);
  outline: none;
  cursor: pointer;
}

.slider-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cyan-bright);
  border: 2px solid #041024;
  box-shadow: 0 0 7px rgba(5, 175, 252, 0.7);
}

.slider-row input[type="range"]::-moz-range-thumb {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--cyan-bright);
  border: 2px solid #041024;
  box-shadow: 0 0 7px rgba(5, 175, 252, 0.7);
}

/* Subpages (/support/ and /privacy/) */
.subpage {
  padding-block: 64px 96px;
}

.prose-card {
  max-width: 820px;
  margin-inline: auto;
  padding: 44px 46px;
}

.prose-card h1 {
  font-size: clamp(2.1rem, 3.4vw, 2.9rem);
  margin-bottom: 12px;
}

.prose-card .meta {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 0.94rem;
}

.prose-card .lead {
  max-width: none;
  margin-bottom: 28px;
}

.prose-card h2 {
  margin: 30px 0 10px;
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--ink);
}

.prose-card p,
.prose-card li {
  color: #c5d4e9;
  font-size: 1rem;
  line-height: 1.75;
}

.prose-card ul {
  margin: 8px 0 18px;
  padding-inline-start: 22px;
}

.prose-card a {
  color: var(--cyan-bright);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
  .hero,
  .section-split-right,
  .section-split-left,
  .cta-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero {
    min-height: auto;
    padding-top: 32px;
  }

  .bubble-lane {
    min-height: 36vh;
  }

  .section-split-left .bubble-lane {
    order: 2;
  }

  .studio-panel {
    left: 14px;
    bottom: 14px;
    width: 260px;
  }
}

@media (max-width: 680px) {
  .wrap {
    width: min(calc(100% - 32px), var(--max-w));
  }

  .nav-links {
    gap: 14px;
  }

  .nav-links a:not(.nav-cta) {
    display: none;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .prose-card {
    padding: 28px 22px;
  }

  .cta-card {
    padding: 28px 22px;
  }

  .studio-panel {
    display: none;
  }
}