:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5e6a7f;
  --paper: rgba(255, 255, 255, 0.78);
  --paper-strong: rgba(255, 255, 255, 0.94);
  --line: rgba(23, 32, 51, 0.11);
  --sky: #3fb7ff;
  --blue: #235bff;
  --mint: #33d6a6;
  --sun: #ffc857;
  --pink: #ff6fb1;
  --violet: #8b6dff;
  --shadow: 0 24px 80px rgba(35, 91, 255, 0.18);
  --radius: 30px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 10%, rgba(255, 200, 87, 0.45), transparent 26rem),
    radial-gradient(circle at 86% 12%, rgba(63, 183, 255, 0.4), transparent 30rem),
    radial-gradient(circle at 70% 84%, rgba(51, 214, 166, 0.22), transparent 28rem),
    linear-gradient(135deg, #f9fbff 0%, #edf6ff 46%, #fff8ec 100%);
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: -20% -10%;
  z-index: -4;
  content: "";
  background: conic-gradient(from 180deg at 50% 50%, rgba(63, 183, 255, 0.18), rgba(255, 200, 87, 0.2), rgba(255, 111, 177, 0.16), rgba(51, 214, 166, 0.18), rgba(63, 183, 255, 0.18));
  filter: blur(28px);
  opacity: 0.8;
  animation: color-drift 18s ease-in-out infinite alternate;
}

a {
  color: inherit;
}

#spark-canvas {
  position: fixed;
  inset: 0;
  z-index: -3;
  width: 100%;
  height: 100%;
  opacity: 0.76;
}

.glow-field {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(35, 91, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 91, 255, 0.08) 1px, transparent 1px);
  background-size: 70px 70px;
  mask-image: radial-gradient(circle at 50% 20%, black, transparent 78%);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  width: 0%;
  height: 4px;
  background: linear-gradient(90deg, var(--blue), var(--mint), var(--sun), var(--pink));
  box-shadow: 0 0 22px rgba(63, 183, 255, 0.55);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  padding: 0.8rem 1rem;
  color: white;
  background: var(--blue);
  border-radius: 999px;
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(1180px, calc(100% - 32px));
  margin: 18px auto 0;
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.76);
  border-radius: 999px;
  box-shadow: 0 18px 60px rgba(35, 91, 255, 0.13);
  backdrop-filter: blur(18px);
}

.brand,
.site-header nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.7rem;
  font-weight: 900;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand-icon {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: white;
  background: linear-gradient(135deg, var(--blue), var(--sky), var(--mint));
  border-radius: 15px;
  box-shadow: 0 12px 30px rgba(35, 91, 255, 0.28);
}

.site-header nav {
  gap: 0.25rem;
}

.site-header nav a {
  padding: 0.65rem 0.8rem;
  color: #3f4c63;
  font-size: 0.95rem;
  font-weight: 750;
  text-decoration: none;
  border-radius: 999px;
  transition: color 180ms ease, background 180ms ease;
}

.site-header nav a:hover,
.site-header nav a:focus-visible {
  color: var(--blue);
  background: rgba(35, 91, 255, 0.08);
}

main {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(350px, 0.95fr);
  gap: 2rem;
  align-items: center;
  min-height: calc(100vh - 92px);
  padding: 5rem 0 4rem;
}

.eyebrow {
  margin: 0 0 0.9rem;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 950;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 820px;
  margin-bottom: 1.2rem;
  font-size: clamp(3rem, 7.5vw, 6.6rem);
  line-height: 0.93;
  letter-spacing: -0.08em;
  text-wrap: balance;
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2.05rem, 5vw, 4.35rem);
  line-height: 1;
  letter-spacing: -0.06em;
  text-wrap: balance;
}

h3 {
  margin-bottom: 0.75rem;
  font-size: clamp(1.25rem, 2vw, 1.58rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

p {
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.72;
}

.lead {
  max-width: 760px;
  color: #33415c;
  font-size: clamp(1.18rem, 2.2vw, 1.54rem);
  line-height: 1.48;
}

.hero-note {
  max-width: 760px;
  margin: 2rem 0;
  padding: 1.25rem 1.4rem;
  color: #2c3951;
  font-size: 1.08rem;
  line-height: 1.7;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-left: 6px solid var(--mint);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.button,
button {
  font: inherit;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0.95rem 1.25rem;
  font-weight: 900;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.button:hover,
.button:focus-visible,
.demo-buttons button:hover,
.demo-buttons button:focus-visible {
  transform: translateY(-2px);
}

.button.primary {
  color: white;
  background: linear-gradient(135deg, var(--blue), var(--sky), var(--mint));
  box-shadow: 0 18px 45px rgba(35, 91, 255, 0.28);
}

.button.secondary {
  color: var(--blue);
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(35, 91, 255, 0.15);
}

.hero-art {
  display: grid;
  min-height: 620px;
  place-items: center;
  perspective: 1200px;
}

.assistant-card {
  position: relative;
  display: grid;
  width: min(100%, 500px);
  min-height: 540px;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 34%, rgba(255, 255, 255, 0.96), transparent 13rem),
    linear-gradient(145deg, rgba(255, 255, 255, 0.86), rgba(255, 255, 255, 0.45));
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 46px;
  box-shadow: var(--shadow);
  transform: rotateX(7deg) rotateY(8deg);
  transform-style: preserve-3d;
  backdrop-filter: blur(20px);
  animation: float-card 7s ease-in-out infinite;
}

.assistant-card::before {
  position: absolute;
  inset: 24px;
  content: "";
  border: 1px solid rgba(35, 91, 255, 0.12);
  border-radius: 36px;
}

.halo {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 2px solid rgba(35, 91, 255, 0.12);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  animation: ring-spin-centered 18s linear infinite;
}

.halo-one {
  width: 330px;
  height: 330px;
  border-top-color: rgba(35, 91, 255, 0.58);
  border-right-color: rgba(51, 214, 166, 0.45);
}

.halo-two {
  width: 440px;
  height: 440px;
  border-bottom-color: rgba(255, 111, 177, 0.4);
  border-left-color: rgba(255, 200, 87, 0.55);
  animation-direction: reverse;
  animation-duration: 25s;
}

.bot-face {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
  width: 178px;
  height: 160px;
  padding: 3rem 2.3rem 2.2rem;
  background: linear-gradient(135deg, var(--blue), var(--sky) 55%, var(--mint));
  border-radius: 44px;
  box-shadow:
    0 22px 50px rgba(35, 91, 255, 0.34),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.bot-face::before {
  position: absolute;
  top: -30px;
  left: 50%;
  width: 3px;
  height: 26px;
  content: "";
  background: var(--blue);
  transform: translateX(-50%);
}

.bot-face::after {
  position: absolute;
  top: -46px;
  left: 50%;
  width: 18px;
  height: 18px;
  content: "";
  background: var(--sun);
  border-radius: 50%;
  box-shadow: 0 0 24px rgba(255, 200, 87, 0.8);
  transform: translateX(-50%);
}

.eye {
  display: block;
  width: 28px;
  height: 28px;
  background: white;
  border-radius: 50%;
  animation: blink 4.5s ease-in-out infinite;
}

.smile {
  position: absolute;
  right: 50px;
  bottom: 34px;
  left: 50px;
  height: 24px;
  border-bottom: 7px solid white;
  border-radius: 0 0 999px 999px;
}

.tool-chip {
  position: absolute;
  z-index: 3;
  padding: 0.62rem 0.85rem;
  color: white;
  font-size: 0.92rem;
  font-weight: 950;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  border-radius: 999px;
  box-shadow: 0 16px 34px rgba(35, 91, 255, 0.18);
  animation: bob 4.4s ease-in-out infinite;
}

.chip-one {
  top: 94px;
  left: 52px;
}

.chip-two {
  top: 152px;
  right: 42px;
  background: linear-gradient(135deg, var(--mint), var(--sky));
  animation-delay: -0.7s;
}

.chip-three {
  right: 70px;
  bottom: 154px;
  background: linear-gradient(135deg, var(--sun), var(--pink));
  animation-delay: -1.3s;
}

.chip-four {
  bottom: 190px;
  left: 48px;
  background: linear-gradient(135deg, var(--pink), var(--violet));
  animation-delay: -2s;
}

.signal-line {
  position: absolute;
  right: 34px;
  bottom: 104px;
  left: 34px;
  height: 4px;
  overflow: hidden;
  background: rgba(35, 91, 255, 0.09);
  border-radius: 999px;
}

.signal-line::before {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, transparent, var(--blue), var(--mint), var(--sun), transparent);
  animation: scan 2.3s ease-in-out infinite;
}

.assistant-card p {
  position: absolute;
  right: 2rem;
  bottom: 1.4rem;
  left: 2rem;
  z-index: 3;
  margin: 0;
  color: #243049;
  font-size: 1.14rem;
  font-weight: 900;
  text-align: center;
}

.section {
  padding: 5.5rem 0;
}

.section-heading {
  max-width: 880px;
  margin-bottom: 2rem;
}

.analogy-grid,
.proof-grid,
.rule-grid {
  display: grid;
  gap: 1rem;
}

.analogy-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.proof-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.rule-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.analogy-card,
.proof-card,
.timeline-item,
.rule-card,
.demo-panel,
.final-cta {
  position: relative;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 18px 60px rgba(35, 91, 255, 0.12);
  backdrop-filter: blur(18px);
}

.analogy-card,
.proof-card,
.timeline-item,
.rule-card {
  padding: 1.45rem;
  border-radius: var(--radius);
}

.analogy-card::before,
.proof-card::before,
.timeline-item::before,
.rule-card::before,
.demo-panel::before,
.final-cta::before {
  position: absolute;
  inset: 0;
  content: "";
  background: radial-gradient(circle at 20% 0%, rgba(255, 255, 255, 0.86), transparent 15rem);
  pointer-events: none;
}

.analogy-card:hover,
.proof-card:hover,
.rule-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 70px rgba(35, 91, 255, 0.18);
}

.analogy-card,
.proof-card,
.rule-card {
  transition: transform 220ms ease, box-shadow 220ms ease;
}

.card-icon {
  display: inline-grid;
  width: 44px;
  height: 44px;
  place-items: center;
  margin-bottom: 1.2rem;
  color: white;
  font-weight: 950;
  background: linear-gradient(135deg, var(--blue), var(--mint));
  border-radius: 15px;
}

.proof-card.big {
  grid-column: span 2;
  background:
    radial-gradient(circle at 85% 12%, rgba(255, 200, 87, 0.28), transparent 17rem),
    var(--paper-strong);
}

.metric {
  display: flex;
  align-items: flex-end;
  gap: 0.75rem;
  margin-bottom: 1.2rem;
}

.metric span {
  color: var(--blue);
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 950;
  line-height: 0.86;
  letter-spacing: -0.07em;
}

.metric small {
  max-width: 90px;
  color: #596982;
  font-weight: 900;
  line-height: 1.1;
}

.bar-chart {
  display: flex;
  align-items: end;
  gap: 0.45rem;
  height: 96px;
  margin-bottom: 1.2rem;
}

.bar-chart span {
  width: 34px;
  height: var(--height);
  background: linear-gradient(180deg, var(--sun), var(--pink));
  border-radius: 999px 999px 10px 10px;
  box-shadow: 0 10px 24px rgba(255, 111, 177, 0.22);
  animation: grow-bar 1.6s ease both;
}

.bar-chart span:nth-child(2) {
  animation-delay: 0.15s;
}

.bar-chart span:nth-child(3) {
  animation-delay: 0.3s;
}

.orbit-badge {
  position: relative;
  width: 100px;
  height: 100px;
  margin-bottom: 1.2rem;
  background: radial-gradient(circle, white 35%, rgba(63, 183, 255, 0.16) 36%);
  border: 1px solid rgba(35, 91, 255, 0.12);
  border-radius: 50%;
}

.orbit-badge::before,
.orbit-badge::after {
  position: absolute;
  inset: 14px;
  content: "";
  border: 2px solid rgba(35, 91, 255, 0.2);
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: ring-spin 5s linear infinite;
}

.orbit-badge::after {
  inset: 29px;
  border-color: rgba(51, 214, 166, 0.32);
  border-right-color: var(--mint);
  animation-direction: reverse;
}

.orbit-badge span {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 22px;
  height: 22px;
  background: var(--sun);
  border-radius: 50%;
  box-shadow: 0 0 24px rgba(255, 200, 87, 0.7);
  transform: translate(-50%, -50%);
}

.spark-stack {
  display: flex;
  gap: 0.55rem;
  margin-bottom: 1.2rem;
}

.spark-stack i {
  display: block;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--blue), var(--sky));
  border-radius: 15px;
  box-shadow: 0 12px 28px rgba(35, 91, 255, 0.2);
  transform: rotate(-8deg);
  animation: bob 3.8s ease-in-out infinite;
}

.spark-stack i:nth-child(2) {
  background: linear-gradient(135deg, var(--mint), var(--sun));
  animation-delay: -0.8s;
}

.spark-stack i:nth-child(3) {
  background: linear-gradient(135deg, var(--pink), var(--violet));
  animation-delay: -1.5s;
}

.timeline {
  position: relative;
  display: grid;
  gap: 1rem;
}

.timeline::before {
  position: absolute;
  top: 20px;
  bottom: 20px;
  left: 22px;
  width: 4px;
  content: "";
  background: linear-gradient(var(--blue), var(--mint), var(--sun), var(--pink));
  border-radius: 999px;
}

.timeline-item {
  margin-left: 64px;
}

.timeline-item span {
  display: inline-flex;
  margin-bottom: 0.8rem;
  padding: 0.38rem 0.7rem;
  color: white;
  font-weight: 950;
  background: linear-gradient(135deg, var(--blue), var(--mint));
  border-radius: 999px;
}

.demo-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(340px, 1.15fr);
  gap: 1rem;
  padding: clamp(1.2rem, 4vw, 2rem);
  border-radius: 38px;
}

.demo-copy,
.demo-screen {
  position: relative;
  z-index: 2;
}

.demo-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.4rem;
}

.demo-buttons button {
  min-height: 48px;
  padding: 0.75rem 1rem;
  color: var(--blue);
  font-weight: 950;
  cursor: pointer;
  background: white;
  border: 1px solid rgba(35, 91, 255, 0.16);
  border-radius: 999px;
  box-shadow: 0 10px 24px rgba(35, 91, 255, 0.1);
  transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}

.demo-buttons button.is-active,
.demo-buttons button:hover,
.demo-buttons button:focus-visible {
  color: white;
  background: var(--blue);
}

.demo-screen {
  min-height: 320px;
  padding: clamp(1.2rem, 3vw, 2rem);
  background:
    linear-gradient(135deg, rgba(35, 91, 255, 0.95), rgba(63, 183, 255, 0.88)),
    radial-gradient(circle at 90% 15%, rgba(255, 255, 255, 0.4), transparent 12rem);
  border-radius: 28px;
  box-shadow: 0 20px 50px rgba(35, 91, 255, 0.22);
}

.screen-label {
  display: inline-flex;
  margin-bottom: 1rem;
  padding: 0.35rem 0.65rem;
  color: #12306b;
  font-size: 0.82rem;
  font-weight: 950;
  background: rgba(255, 255, 255, 0.82);
  border-radius: 999px;
}

.demo-screen h3,
.demo-screen p:not(.screen-label) {
  color: white;
}

.demo-screen p:not(.screen-label) {
  font-size: 1.18rem;
}

.rule-card span {
  display: block;
  width: 54px;
  height: 54px;
  margin-bottom: 1rem;
  background:
    radial-gradient(circle at 50% 50%, white 0 28%, transparent 29%),
    conic-gradient(var(--blue), var(--mint), var(--sun), var(--pink), var(--blue));
  border-radius: 50%;
  animation: ring-spin 8s linear infinite;
}

.final-cta {
  margin: 3rem 0 5rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(51, 214, 166, 0.24), transparent 22rem),
    rgba(255, 255, 255, 0.84);
  border-radius: 38px;
}

.final-cta p {
  max-width: 780px;
  margin-right: auto;
  margin-left: auto;
}

.site-footer {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto 2rem;
  padding: 1.1rem;
  text-align: center;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
  font-size: 0.95rem;
}

.reveal {
  opacity: 0;
  transform: translateY(28px) scale(0.98);
  transition: opacity 700ms ease, transform 700ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

@keyframes color-drift {
  0% {
    transform: translate3d(-2%, -1%, 0) rotate(0deg) scale(1);
  }
  100% {
    transform: translate3d(2%, 3%, 0) rotate(16deg) scale(1.08);
  }
}

@keyframes float-card {
  0%, 100% {
    transform: rotateX(7deg) rotateY(8deg) translateY(0);
  }
  50% {
    transform: rotateX(4deg) rotateY(4deg) translateY(-16px);
  }
}

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

@keyframes ring-spin-centered {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

@keyframes bob {
  0%, 100% {
    transform: translateY(0) rotate(-4deg);
  }
  50% {
    transform: translateY(-10px) rotate(3deg);
  }
}

@keyframes blink {
  0%, 92%, 100% {
    transform: scaleY(1);
  }
  95% {
    transform: scaleY(0.15);
  }
}

@keyframes scan {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

@keyframes grow-bar {
  from {
    height: 8%;
  }
  to {
    height: var(--height);
  }
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 4rem;
  }

  .hero-art {
    min-height: 530px;
  }

  .analogy-grid,
  .rule-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .proof-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .demo-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
    border-radius: 26px;
  }

  .brand span:last-child {
    display: none;
  }

  .site-header nav {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .site-header nav a {
    padding: 0.55rem 0.62rem;
    font-size: 0.88rem;
  }

  h1 {
    font-size: clamp(2.75rem, 14vw, 4.5rem);
  }

  .hero,
  .section {
    padding: 3.8rem 0;
  }

  .analogy-grid,
  .proof-grid,
  .rule-grid {
    grid-template-columns: 1fr;
  }

  .proof-card.big {
    grid-column: auto;
  }

  .assistant-card {
    min-height: 450px;
    transform: none;
  }

  .halo-one {
    width: 260px;
    height: 260px;
  }

  .halo-two {
    width: 340px;
    height: 340px;
  }

  .bot-face {
    width: 148px;
    height: 136px;
    padding: 2.55rem 1.85rem 2rem;
  }

  .tool-chip {
    font-size: 0.78rem;
  }

  .chip-one {
    top: 82px;
    left: 22px;
  }

  .chip-two {
    top: 126px;
    right: 20px;
  }

  .chip-three {
    right: 26px;
    bottom: 146px;
  }

  .chip-four {
    bottom: 170px;
    left: 22px;
  }

  .timeline::before {
    left: 16px;
  }

  .timeline-item {
    margin-left: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }

  #spark-canvas {
    display: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}