/* ---------- Sky ---------- */
.sky {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: var(--black);
}

.sky-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* Nebula haze: layered blue radial gradients only */
.sky-nebula {
  position: absolute;
  inset: -10%;
  background:
    radial-gradient(40% 30% at 78% 18%, var(--blue-10), transparent 70%),
    radial-gradient(35% 25% at 15% 40%, var(--blue-05), transparent 70%),
    radial-gradient(60% 40% at 50% 110%, var(--blue-20), transparent 70%);
  animation: haze 40s ease-in-out infinite alternate;
}

@keyframes haze {
  to {
    transform: translate3d(-2%, 1.5%, 0) scale(1.04);
  }
}

.page,
.shell {
  position: relative;
  min-height: 100vh;
}

.page > :not(.sky),
.shell > :not(.sky) {
  position: relative;
  z-index: 1;
}

/* ---------- Logo ---------- */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-mark {
  border-radius: 9px;
  background: var(--white);
  box-shadow: 0 0 18px var(--blue-20);
}

.logo-word {
  font: 600 1.125rem var(--font-display);
  letter-spacing: 0.01em;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(0, 0, 0, 0.55);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}

.nav-brand {
  text-decoration: none;
}

.nav-links {
  display: none;
  gap: 24px;
  margin-left: 16px;
}

.nav-links a,
.nav-signin {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.9375rem;
}

.nav-links a:hover,
.nav-signin:hover {
  color: var(--white);
}

.nav-auth {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}

.nav-cta {
  margin-left: auto;
  height: 38px;
  padding: 0 16px;
}

.nav-auth .nav-cta {
  margin-left: 0;
}

@media (min-width: 720px) {
  .nav-links {
    display: flex;
  }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 80px 0 140px;
}

.hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}

.hero-title {
  font-size: clamp(2.75rem, 9vw, 6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.glow-text {
  color: var(--white);
  text-shadow: 0 0 24px var(--blue-60), 0 0 60px var(--blue-35);
}

.hero-sub {
  max-width: 620px;
  font-size: 1.125rem;
}

.hero-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  max-width: 540px;
  padding: 6px;
  border-radius: 28px;
  border: 1px solid var(--blue-35);
  background: rgba(0, 0, 0, 0.55);
  box-shadow: var(--glow-lg);
}

.hero-form .input {
  border: none;
  background: transparent;
  box-shadow: none;
}

@media (min-width: 560px) {
  .hero-form {
    flex-direction: row;
    border-radius: 999px;
  }
}

.hero-meta {
  color: var(--text-3);
}

/* Neon horizon: a glowing planet edge at the bottom of the hero */
.horizon {
  position: absolute;
  left: 50%;
  bottom: -118vw;
  width: 150vw;
  height: 150vw;
  transform: translateX(-50%);
  border-radius: 50%;
  background: var(--black);
  border-top: 1px solid var(--blue);
  box-shadow:
    0 -2px 18px var(--blue-60),
    0 -30px 120px var(--blue-20),
    inset 0 30px 80px var(--blue-10);
}

@media (min-width: 900px) {
  .horizon {
    bottom: -128vw;
  }
}

/* ---------- Sections ---------- */
.section {
  padding: 72px 0;
}

.section-title {
  font-size: clamp(1.9rem, 4.5vw, 2.75rem);
  margin: 10px 0 32px;
}

.feature-grid,
.blog-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .feature-grid,
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .feature-grid,
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-label {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--blue);
}

.feature-label .mono {
  color: var(--text-2);
}

.feature:hover .icon,
.active .icon,
.side-link.active .icon {
  color: var(--blue);
  filter: drop-shadow(0 0 6px var(--blue-60));
}

.feature h3 {
  font-size: 1.25rem;
}

/* Steps along an orbit line */
.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 16px;
}

@media (min-width: 820px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
    position: relative;
  }

  .steps::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 22px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--blue-60), transparent);
  }
}

.step {
  position: relative;
  padding-top: 56px;
}

.step-n {
  position: absolute;
  top: 0;
  left: 0;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--blue-60);
  background: var(--black);
  color: var(--white);
  box-shadow: var(--glow-sm);
}

.step h3 {
  font-size: 1.2rem;
  margin-bottom: 6px;
}

/* Demo frame */
.demo-frame {
  padding: 0;
  overflow: hidden;
  border-color: var(--blue-35);
  box-shadow: var(--glow-lg);
}

.demo-bar {
  display: flex;
  justify-content: space-between;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
}

.demo-body {
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 16px;
  background: radial-gradient(50% 60% at 50% 50%, var(--blue-10), transparent);
}

/* Orbiting dot loader */
.orbit-loader {
  position: relative;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 1px dashed var(--blue-35);
  animation: spin 2.4s linear infinite;
}

.orbit-loader span {
  position: absolute;
  top: -4px;
  left: 50%;
  width: 8px;
  height: 8px;
  margin-left: -4px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 10px var(--blue);
}

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

.boot {
  min-height: 100vh;
  display: grid;
  place-items: center;
}

/* ---------- Pricing ---------- */
.pricing-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.pricing-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
    align-items: stretch;
  }
}

.tier {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 28px;
}

.tier-featured {
  border-color: var(--blue-60);
  box-shadow: var(--glow-md), var(--glow-lg);
}

.tier-flag {
  position: absolute;
  top: -12px;
  right: 20px;
  background: var(--black);
}

.tier h3 {
  font-size: 1.5rem;
}

.tier-price {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 8px 0;
}

.tier-amount {
  font: 700 2.5rem var(--font-display);
}

.tier-strike {
  font-size: 0.875rem;
}

.tier-features {
  list-style: none;
  padding: 0;
  margin: 8px 0 20px;
  display: grid;
  gap: 10px;
  flex: 1;
}

.tier-features li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--text-2);
}

.tier-features .icon {
  color: var(--blue);
  flex-shrink: 0;
  margin-top: 4px;
}

.tier-cta {
  width: 100%;
}

/* ---------- Blog ---------- */
.blog-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-decoration: none;
}

.blog-card h3,
.blog-card-title {
  font-size: 1.2rem;
}

.blog-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.blog-index {
  padding: 64px var(--gutter) 96px;
}

.blog-lede {
  max-width: 620px;
  margin: -16px 0 32px;
}

.post {
  max-width: 760px;
  padding: 48px var(--gutter) 96px;
}

.post-back {
  display: inline-block;
  margin-bottom: 24px;
  text-decoration: none;
}

.post-title {
  font-size: clamp(2.2rem, 6vw, 3.5rem);
  margin: 10px 0 16px;
}

.post-lede {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.post-hero {
  width: 100%;
  border-radius: var(--radius);
  margin: 24px 0;
}

.post-body {
  margin-top: 32px;
}

.post-body section {
  margin-bottom: 40px;
}

.post-body h2 {
  font-size: 1.6rem;
  margin-bottom: 14px;
}

.post-body p,
.post-body li {
  color: var(--text-2);
  font-size: 1.0625rem;
  margin-bottom: 14px;
}

.post-body blockquote {
  margin: 20px 0;
  padding: 16px 20px;
  border-left: 2px solid var(--blue);
  background: var(--blue-05);
  font: 500 1.2rem var(--font-display);
  box-shadow: -8px 0 24px -12px var(--blue-60);
}

.faq {
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
}

.faq p {
  margin-top: 10px;
}

.post-cta {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
  margin: 40px 0;
  border-color: var(--blue-35);
}

.post-related {
  margin-top: 48px;
}

.post-related .eyebrow {
  margin-bottom: 16px;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 48px 0 24px;
  background: rgba(0, 0, 0, 0.7);
}

.footer-inner {
  display: grid;
  gap: 32px;
}

@media (min-width: 820px) {
  .footer-inner {
    grid-template-columns: 1fr 2fr;
  }
}

.footer-brand {
  display: grid;
  gap: 12px;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 24px;
}

.footer-cols div {
  display: grid;
  gap: 8px;
  align-content: start;
}

.footer-cols a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.9375rem;
}

.footer-cols a:hover {
  color: var(--white);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  margin-top: 40px;
  color: var(--text-3);
}

.final-cta {
  text-align: center;
}

.final-cta .container {
  display: grid;
  justify-items: center;
  gap: 16px;
}

.final-cta .section-title {
  margin: 0;
}

/* ---------- Auth ---------- */
.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 24px;
  padding: 32px var(--gutter);
}

.auth-logo {
  text-decoration: none;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  display: grid;
  gap: 18px;
  padding: 32px 28px;
  background: rgba(0, 0, 0, 0.7);
}

.auth-title {
  font-size: 1.6rem;
}

.auth-form {
  display: grid;
  gap: 14px;
}

.auth-form label {
  display: grid;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--text-2);
}

.auth-form .input {
  border-radius: var(--radius-sm);
}

.code-input {
  font-family: var(--font-mono);
  letter-spacing: 0.4em;
  text-align: center;
  font-size: 1.25rem;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-3);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.google-btn {
  display: flex;
  justify-content: center;
  min-height: 44px;
}

.auth-hint {
  text-align: center;
}

.auth-switch {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.875rem;
}

.link-btn {
  background: none;
  border: none;
  padding: 0;
  color: var(--white);
  font: inherit;
  text-decoration: underline;
  text-decoration-color: var(--blue-60);
  text-underline-offset: 3px;
  cursor: pointer;
}

.link-btn:hover {
  text-decoration-color: var(--blue);
}

/* ---------- App shell ---------- */
.shell {
  display: grid;
  grid-template-columns: 1fr;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(10px);
}

.sidebar nav {
  display: flex;
  gap: 4px;
  overflow-x: auto;
}

.side-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.9375rem;
  white-space: nowrap;
  border: 1px solid transparent;
}

.side-link:hover {
  color: var(--white);
  background: var(--surface-2);
}

.side-link.active {
  color: var(--white);
  border-color: var(--blue-35);
  background: var(--blue-10);
  box-shadow: inset 2px 0 0 var(--blue);
}

.sidebar-user {
  display: none;
}

@media (min-width: 900px) {
  .shell {
    grid-template-columns: 248px 1fr;
  }

  .sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    border-bottom: none;
    border-right: 1px solid var(--line);
  }

  .sidebar nav {
    flex-direction: column;
    overflow: visible;
  }

  .sidebar-user {
    display: grid;
    gap: 6px;
    margin-top: auto;
    overflow: hidden;
    text-overflow: ellipsis;
  }
}

.shell-main {
  padding: 32px var(--gutter) 64px;
  min-width: 0;
}

/* Mission Control */
.mc-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 28px;
}

.mc-head h1 {
  font-size: clamp(1.6rem, 4vw, 2.25rem);
  margin-top: 8px;
}

.mc-grid {
  display: grid;
  gap: 16px;
}

@media (min-width: 1100px) {
  .mc-grid {
    grid-template-columns: 3fr 2fr;
  }
}

.mc-card {
  display: grid;
  gap: 14px;
  align-content: start;
}

.mc-card h2 {
  font-size: 1.25rem;
}

.inline-form {
  display: flex;
  gap: 8px;
}

.inline-form .input {
  flex: 1;
  min-width: 0;
}

.source-list,
.nb-list,
.nbv-docs {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.source-row {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.source-title {
  display: grid;
  gap: 2px;
  min-width: 0;
  overflow-wrap: anywhere;
}

.nb-link {
  text-decoration: none;
  border-bottom: 1px solid var(--blue-35);
}

/* Rocket ascent progress bar with a light trail */
.ascent-track {
  height: 6px;
  border-radius: 999px;
  background: var(--surface-2);
  overflow: hidden;
}

.ascent-fill {
  position: relative;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--blue-10), var(--blue));
  box-shadow: 0 0 12px var(--blue-60);
  transition: width 0.4s ease;
}

.ascent-fill::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -4px;
  border-radius: 50%;
  background: var(--white);
  box-shadow: 0 0 10px var(--white), 0 0 18px var(--blue);
}

.ascent-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 6px;
  color: var(--text-2);
  font-size: 0.75rem;
}

/* Notebook view: sources | chat | artifacts */
.nbv {
  display: grid;
  gap: 16px;
}

@media (min-width: 1100px) {
  .nbv {
    grid-template-columns: 260px 1fr 280px;
    height: calc(100vh - 96px);
  }
}

.nbv-pane {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 0;
  overflow: auto;
}

.nbv-title {
  font-size: 1.2rem;
}

.nbv-docs a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.875rem;
}

.nbv-docs a:hover {
  color: var(--white);
}

.nbv-chat {
  min-height: 420px;
}

.nbv-turns {
  flex: 1;
  display: grid;
  align-content: start;
  gap: 16px;
  overflow: auto;
}

.turn {
  display: grid;
  gap: 8px;
  max-width: 100%;
}

.turn-user {
  justify-self: end;
  padding: 10px 14px;
  border-radius: 14px 14px 4px 14px;
  background: var(--blue-10);
  border: 1px solid var(--blue-35);
}

.cites {
  display: grid;
  gap: 8px;
  padding-left: 20px;
  margin: 0;
  font-size: 0.875rem;
}

.cites a {
  text-decoration-color: var(--blue-60);
}

.cite-span {
  font-size: 0.8125rem;
}

/* Empty states */
.empty-state {
  display: grid;
  justify-items: center;
  text-align: center;
  gap: 14px;
  padding: 80px 16px;
}

.empty-state.small {
  padding: 40px 16px;
  color: var(--blue);
}

.empty-art {
  color: var(--white);
  opacity: 0.85;
}