/* Beacon — Grok Bot Showcase · deep space / sharp white / ember+cyan */

:root {
  --bg: #05060a;
  --bg-elev: #0b0d14;
  --bg-card: rgba(14, 17, 28, 0.72);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #f4f6fb;
  --muted: rgba(244, 246, 251, 0.62);
  --dim: rgba(244, 246, 251, 0.38);
  --cyan: #22d3ee;
  --cyan-soft: rgba(34, 211, 238, 0.16);
  --ember: #ff6b3d;
  --ember-soft: rgba(255, 107, 61, 0.18);
  --violet: #8b5cf6;
  --radius: 18px;
  --max: 1120px;
  --font: "Inter", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(34, 211, 238, 0.09), transparent 55%),
    radial-gradient(ellipse 50% 40% at 90% 20%, rgba(255, 107, 61, 0.07), transparent 50%),
    linear-gradient(180deg, #05060a 0%, #070910 40%, #05060a 100%);
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
}

::selection {
  background: rgba(34, 211, 238, 0.35);
  color: #fff;
}

/* Atmosphere */
.noise {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' 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");
}

.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  will-change: transform;
  opacity: 0.55;
}

.orb-a {
  width: 42vw;
  height: 42vw;
  max-width: 560px;
  max-height: 560px;
  top: -8%;
  left: -10%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.35), transparent 68%);
}

.orb-b {
  width: 36vw;
  height: 36vw;
  max-width: 480px;
  max-height: 480px;
  top: 28%;
  right: -12%;
  background: radial-gradient(circle, rgba(255, 107, 61, 0.28), transparent 68%);
}

.orb-c {
  width: 30vw;
  height: 30vw;
  max-width: 400px;
  max-height: 400px;
  bottom: 8%;
  left: 30%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.22), transparent 68%);
}

.topbar,
main,
.footer {
  position: relative;
  z-index: 2;
}

/* Top bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px clamp(16px, 4vw, 40px);
  backdrop-filter: blur(16px);
  background: rgba(5, 6, 10, 0.72);
  border-bottom: 1px solid var(--line);
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.mark-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan), 0 0 28px rgba(34, 211, 238, 0.45);
  animation: pulseDot 2.4s ease-in-out infinite;
}

.topbar.scrolled {
  background: rgba(5, 6, 10, 0.88);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}

.topnav {
  display: none;
  gap: 22px;
}

.topnav a {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}

.topnav a:hover,
.topnav a:focus-visible {
  color: var(--text);
}

@media (min-width: 860px) {
  .topnav {
    display: flex;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.btn-sm {
  min-height: 36px;
  padding: 0 14px;
  font-size: 12px;
}

.btn-primary {
  background: linear-gradient(135deg, #2de0f5 0%, #22d3ee 40%, #ff7a4d 140%);
  color: #041018;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08), 0 10px 40px rgba(34, 211, 238, 0.22);
}

.btn-primary:hover {
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12), 0 14px 48px rgba(34, 211, 238, 0.35);
}

.btn-secondary,
.btn-ghost {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--line-strong);
  color: var(--text);
}

.btn-secondary:hover,
.btn-ghost:hover {
  border-color: rgba(34, 211, 238, 0.45);
  background: rgba(34, 211, 238, 0.06);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Hero — title card */
.hero {
  position: relative;
  min-height: min(100vh, 920px);
  min-height: min(100svh, 920px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(56px, 10vh, 120px) clamp(16px, 4vw, 40px) 80px;
  scroll-snap-align: start;
}

.hero-frame {
  max-width: 920px;
  margin: 0 auto;
  width: 100%;
  padding: clamp(28px, 5vw, 56px);
  border: 1px solid var(--line-strong);
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 40%),
    rgba(8, 10, 16, 0.55);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.5),
    0 30px 100px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  will-change: transform;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ember);
  box-shadow: 0 0 10px var(--ember);
  animation: pulseDot 1.8s ease-in-out infinite;
}

.title-card {
  font-size: clamp(2.4rem, 7.2vw, 5.4rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 0.98;
  color: #fff;
  text-wrap: balance;
}

.title-card em {
  font-style: normal;
  background: linear-gradient(105deg, #fff 10%, var(--cyan) 48%, var(--ember) 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  max-width: 38rem;
  margin: 22px 0 32px;
  font-size: clamp(1.02rem, 2vw, 1.2rem);
  color: var(--muted);
  text-wrap: pretty;
}

.hero-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 36px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
}

.hero-meta .sep {
  width: 18px;
  height: 1px;
  background: var(--line-strong);
}

.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  width: 26px;
  height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  display: grid;
  place-items: start center;
  padding-top: 8px;
}

.scroll-hint span {
  width: 4px;
  height: 8px;
  border-radius: 999px;
  background: var(--cyan);
  animation: scrollBounce 1.8s var(--ease) infinite;
}

/* Sections */
.section {
  padding: clamp(72px, 12vh, 128px) clamp(16px, 4vw, 40px);
  scroll-snap-align: start;
}

.section-head {
  max-width: var(--max);
  margin: 0 auto 40px;
}

.kicker {
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ember);
}

.section h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.1;
  text-wrap: balance;
}

.section-sub {
  margin-top: 12px;
  max-width: 36rem;
  color: var(--muted);
}

/* Features */
.feature-grid {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

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

.feature-card {
  position: relative;
  padding: 28px 26px 30px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  overflow: hidden;
  transition: border-color 0.3s ease, transform 0.35s var(--ease), box-shadow 0.35s ease;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.55), rgba(255, 107, 61, 0.45), transparent);
  opacity: 0.7;
}

.feature-card:hover {
  border-color: rgba(34, 211, 238, 0.35);
  transform: translateY(-3px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

.feature-num {
  display: block;
  margin-bottom: 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.feature-card h3 {
  margin-bottom: 10px;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.feature-card p {
  color: var(--muted);
  max-width: 34ch;
}

/* Quote */
.quote {
  padding: clamp(48px, 8vh, 88px) clamp(16px, 4vw, 40px);
}

.quote blockquote {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  padding: clamp(36px, 6vw, 64px);
  border-radius: 24px;
  border: 1px solid var(--line);
  background:
    radial-gradient(ellipse at 50% 0%, rgba(255, 107, 61, 0.12), transparent 55%),
    rgba(10, 12, 20, 0.7);
}

.quote p {
  font-size: clamp(1.6rem, 4.2vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  background: linear-gradient(180deg, #fff, rgba(244, 246, 251, 0.72));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Constellation */
.constellation-grid {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .constellation-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 980px) {
  .constellation-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.node {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 150px;
  padding: 22px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(9, 11, 18, 0.8);
  transition: border-color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease, min-height 0.35s var(--ease);
}

.node:hover,
.node:focus-visible,
.node.is-open {
  border-color: rgba(34, 211, 238, 0.4);
  background: rgba(12, 16, 28, 0.95);
  box-shadow: 0 0 0 1px rgba(34, 211, 238, 0.08), 0 18px 40px rgba(0, 0, 0, 0.35);
}

.node:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.node-icon {
  font-size: 14px;
  color: var(--cyan);
  text-shadow: 0 0 12px rgba(34, 211, 238, 0.55);
}

.node-title {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.node-body {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  color: var(--muted);
  font-size: 0.94rem;
  transition: max-height 0.35s var(--ease), opacity 0.3s ease, margin 0.3s ease;
}

.node.is-open .node-body,
.node:hover .node-body,
.node:focus-visible .node-body {
  max-height: 160px;
  opacity: 1;
  margin-top: 2px;
}

/* Ladder */
.ladder-list {
  list-style: none;
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  counter-reset: none;
}

.rung {
  display: grid;
  gap: 14px;
  padding: 22px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(10, 12, 20, 0.75);
  transition: border-color 0.3s ease, transform 0.35s var(--ease);
}

.rung:hover {
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateX(4px);
}

.rung.is-live {
  border-color: rgba(34, 211, 238, 0.35);
  background:
    linear-gradient(135deg, rgba(34, 211, 238, 0.08), transparent 45%),
    rgba(10, 12, 20, 0.85);
  box-shadow: 0 0 40px rgba(34, 211, 238, 0.08);
}

@media (min-width: 800px) {
  .rung {
    grid-template-columns: 64px 1fr minmax(200px, 240px);
    align-items: center;
    padding: 26px 28px;
  }
}

.rung-index {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.rung-body h3 {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
}

.tag.live {
  border-color: rgba(34, 211, 238, 0.45);
  color: var(--cyan);
  background: var(--cyan-soft);
}

.rung-body p {
  color: var(--muted);
  max-width: 52ch;
}

.rung-ambition {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  line-height: 1.5;
  color: var(--ember);
}

/* Built strip */
.built {
  padding: 0 clamp(16px, 4vw, 40px) clamp(72px, 10vh, 110px);
}

.built-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 48px);
  border-radius: 24px;
  border: 1px solid var(--line);
  background:
    linear-gradient(120deg, rgba(255, 107, 61, 0.08), transparent 40%),
    linear-gradient(300deg, rgba(34, 211, 238, 0.08), transparent 45%),
    rgba(9, 11, 18, 0.9);
}

.built-inner h2 {
  margin-bottom: 14px;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  letter-spacing: -0.03em;
}

.built-inner > p {
  max-width: 54ch;
  color: var(--muted);
}

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

.built-inner a:hover {
  color: #fff;
}

.built-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.built-chips a,
.built-chips span {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.02);
}

.built-chips a:hover {
  color: var(--text);
  border-color: rgba(34, 211, 238, 0.4);
}

/* Closing */
.closing {
  padding-top: 0;
}

.closing-card {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(36px, 6vw, 64px);
  border-radius: 28px;
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(ellipse at 20% 0%, rgba(34, 211, 238, 0.14), transparent 50%),
    radial-gradient(ellipse at 90% 100%, rgba(255, 107, 61, 0.12), transparent 45%),
    rgba(8, 10, 16, 0.9);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
}

.closing-card h2 {
  margin-bottom: 14px;
}

.closing-body {
  max-width: 46rem;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 1.05rem;
}

/* Footer */
.footer {
  padding: 36px clamp(16px, 4vw, 40px) 48px;
  border-top: 1px solid var(--line);
  text-align: center;
}

.footer p {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.footer-sub {
  margin-top: 8px;
  color: var(--dim) !important;
  font-size: 11px !important;
}

/* Reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

/* Motion */
@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.85); }
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(10px); opacity: 0.35; }
}

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