:root {
  --ink: #10131a;
  --muted: #5b6473;
  --line: #dce2ea;
  --paper: #f8fafc;
  --white: #ffffff;
  --blue: #2f7df6;
  --blue-dark: #1556c0;
  --green: #00c853;
  --mint: #dff9ea;
  --charcoal: #1f232b;
  --gold: #f5b84b;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Inter", Arial, sans-serif;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 72px;
  padding: 16px clamp(20px, 4vw, 56px);
  border-bottom: 1px solid rgba(16, 19, 26, 0.09);
  background: rgba(248, 250, 252, 0.86);
  backdrop-filter: blur(20px);
}

.brand,
nav,
.hero-actions,
.metrics {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  color: var(--white);
  background: var(--blue);
  font-size: 17px;
}

nav {
  gap: clamp(16px, 3vw, 34px);
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

nav a:hover,
.header-action:hover {
  color: var(--blue-dark);
}

.header-action {
  color: var(--blue);
  font-size: 14px;
  font-weight: 800;
}

.panel {
  min-height: 100vh;
  padding: 116px clamp(22px, 5vw, 72px) 56px;
  display: grid;
  align-items: center;
  gap: clamp(32px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  scroll-snap-align: start;
}

main {
  scroll-snap-type: y proximity;
}

.hero {
  grid-template-columns: minmax(280px, 0.8fr) minmax(420px, 1.2fr);
  background:
    linear-gradient(120deg, rgba(223, 249, 234, 0.92), rgba(248, 250, 252, 0.72) 44%, rgba(232, 239, 255, 0.9)),
    var(--paper);
  overflow: hidden;
}

.hero-copy,
.section-copy {
  max-width: 690px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1,
h2 {
  margin-bottom: 24px;
  max-width: 820px;
  color: var(--ink);
  font-weight: 800;
  line-height: 0.98;
}

h1 {
  font-size: 96px;
}

h2 {
  font-size: 72px;
}

h3 {
  margin-bottom: 12px;
  font-size: 30px;
  line-height: 1;
}

p {
  color: var(--muted);
  font-size: 21px;
  line-height: 1.55;
}

.hero-lede {
  max-width: 620px;
  color: #303848;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 800;
}

.button.primary {
  color: var(--white);
  background: var(--blue);
  box-shadow: 0 16px 32px rgba(47, 125, 246, 0.25);
}

.button.primary:hover {
  background: var(--blue-dark);
}

.button.secondary {
  border-color: rgba(16, 19, 26, 0.16);
  background: rgba(255, 255, 255, 0.66);
}

.product-shot {
  margin: 0;
  transform: perspective(1600px) rotateY(-10deg) rotateX(3deg);
  transform-origin: left center;
}

.product-shot img {
  display: block;
  width: min(100%, 960px);
  border-radius: 8px;
  border: 1px solid rgba(16, 19, 26, 0.2);
  box-shadow: 0 30px 90px rgba(16, 19, 26, 0.28);
}

.method {
  grid-template-columns: 0.8fr 1.2fr;
  background: var(--white);
}

.decision-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.decision-grid article {
  min-height: 350px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.decision-grid span {
  display: inline-flex;
  margin-bottom: 82px;
  color: var(--blue);
  font-weight: 800;
}

.decision-grid p {
  font-size: 17px;
}

.assistant {
  grid-template-columns: minmax(300px, 0.9fr) minmax(300px, 1fr);
  color: var(--white);
  background: var(--charcoal);
}

.assistant h2,
.assistant p:not(.eyebrow) {
  color: var(--white);
}

.assistant .eyebrow {
  color: var(--gold);
}

.assistant-board {
  width: min(100%, 560px);
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: #12151b;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 24px 70px rgba(0, 0, 0, 0.3);
}

.assistant-top {
  display: flex;
  gap: 8px;
  margin-bottom: 34px;
}

.assistant-top span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ff605c;
}

.assistant-top span:nth-child(2) {
  background: #ffbd44;
}

.assistant-top span:nth-child(3) {
  background: #00ca4e;
}

.prompt-row {
  margin-top: 12px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: #d8dee9;
  background: rgba(255, 255, 255, 0.04);
  font-weight: 700;
}

.prompt-row.strong {
  color: var(--ink);
  background: var(--mint);
}

.control {
  grid-template-columns: 1fr;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(239, 247, 255, 0.9)),
    var(--paper);
}

.metrics {
  align-items: stretch;
  gap: 18px;
}

.metrics div {
  flex: 1;
  min-height: 220px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.metrics strong {
  display: block;
  margin-bottom: 18px;
  color: var(--blue);
  font-size: 88px;
  line-height: 1;
}

.metrics span {
  display: block;
  max-width: 300px;
  color: var(--muted);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
}

.closing {
  min-height: 74vh;
  place-items: center;
  text-align: center;
  background: var(--ink);
}

.closing h2,
.closing p {
  color: var(--white);
}

.closing p {
  max-width: 650px;
  margin-right: auto;
  margin-left: auto;
}

.closing .eyebrow {
  color: var(--green);
}

@media (max-width: 980px) {
  .site-header {
    position: sticky;
  }

  nav {
    display: none;
  }

  .panel,
  .hero,
  .method,
  .assistant {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 54px;
  }

  h1 {
    font-size: 74px;
  }

  h2 {
    font-size: 58px;
  }

  .product-shot {
    transform: none;
  }

  .product-shot img {
    width: 100%;
  }

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

  .decision-grid article {
    min-height: auto;
  }

  .decision-grid span {
    margin-bottom: 36px;
  }

  .metrics {
    flex-direction: column;
  }

  .metrics strong {
    font-size: 72px;
  }

}

@media (max-width: 560px) {
  .site-header {
    min-height: 64px;
    padding: 14px 18px;
  }

  .header-action {
    display: none;
  }

  .panel {
    min-height: auto;
    padding: 72px 18px 46px;
  }

  h1 {
    font-size: 50px;
  }

  h2 {
    font-size: 38px;
  }

  p {
    font-size: 17px;
  }

  .button {
    width: 100%;
  }

}