:root {
  --color-ink: #f5f7ef;
  --color-muted: #b6bbb2;
  --color-bg: #111312;
  --color-panel: #1b1e1d;
  --color-panel-2: #252927;
  --color-line: #343a36;
  --color-pad-mint: #8df5c2;
  --color-pad-cyan: #79d8ff;
  --color-pad-rose: #ff93c7;
  --color-pad-amber: #ffd36e;
  --color-action: #f4f0d4;
  --font-ui: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SF Mono", Menlo, Consolas, monospace;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --radius-1: 4px;
  --radius-2: 6px;
  --shadow-soft: 0 20px 80px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-ui);
}

a {
  color: inherit;
}

.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--color-line);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(17, 19, 18, 0.94), rgba(17, 19, 18, 0.62) 54%, rgba(17, 19, 18, 0.85)),
    url("assets/hero-panel.svg") center right 24px / min(620px, 54vw) auto no-repeat,
    radial-gradient(circle at 82% 28%, rgba(121, 216, 255, 0.16), transparent 30%),
    var(--color-bg);
}

.hero-inner {
  position: relative;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0 86px;
}

.eyebrow,
.label {
  margin: 0 0 var(--space-3);
  color: var(--color-pad-mint);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: var(--space-4);
  max-width: 580px;
  font-size: clamp(4rem, 10vw, 7.4rem);
  line-height: 0.9;
  letter-spacing: 0;
}

h2 {
  margin-bottom: var(--space-4);
  max-width: 820px;
  font-size: clamp(2rem, 6vw, 4.5rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  font-size: 1rem;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 540px;
  color: var(--color-muted);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  line-height: 1.7;
}

.support {
  margin: var(--space-5) 0 0;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-2);
  padding: 0 var(--space-5);
  text-decoration: none;
  font-weight: 700;
}

.button.primary {
  background: var(--color-action);
  color: #161712;
}

.button.secondary {
  border: 1px solid var(--color-line);
  background: rgba(255, 255, 255, 0.04);
}

.band {
  border-bottom: 1px solid var(--color-line);
}

.section-inner {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 82px 0;
}

.section-inner.narrow {
  max-width: 850px;
}

.section-inner.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
  gap: var(--space-7);
  align-items: center;
}

.section-inner p,
.check-list {
  color: var(--color-muted);
  line-height: 1.75;
}

.point-grid,
.feature-grid,
.flow-row {
  display: grid;
  gap: var(--space-3);
}

.point-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: var(--space-5);
}

.point-grid span,
.step,
.feature-card {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-2);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.point-grid span {
  padding: var(--space-4);
  color: var(--color-ink);
}

.diagram {
  width: 100%;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-2);
  background: #0b0c0b;
}

.check-list {
  padding-left: 1.2em;
}

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

.step {
  min-height: 132px;
  padding: var(--space-4);
}

.step b {
  display: inline-grid;
  width: 30px;
  height: 30px;
  place-items: center;
  margin-bottom: var(--space-4);
  border-radius: 50%;
  background: var(--color-panel-2);
  color: var(--color-pad-amber);
}

.step span {
  display: block;
  color: var(--color-muted);
  line-height: 1.55;
}

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

.feature-card {
  min-height: 174px;
  padding: var(--space-5);
}

.feature-card p {
  color: var(--color-muted);
  line-height: 1.6;
}

.feature-card.mint {
  border-color: rgba(141, 245, 194, 0.45);
}

.feature-card.cyan {
  border-color: rgba(121, 216, 255, 0.45);
}

.feature-card.rose {
  border-color: rgba(255, 147, 199, 0.45);
}

.feature-card.amber {
  border-color: rgba(255, 211, 110, 0.45);
}

footer {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: var(--space-5) 0;
  color: var(--color-muted);
}

footer strong {
  color: var(--color-ink);
}

@media (max-width: 820px) {
  .hero {
    min-height: 86vh;
  }

  .hero-bg {
    background:
      linear-gradient(180deg, rgba(17, 19, 18, 0.94), rgba(17, 19, 18, 0.76)),
      url("assets/hero-panel.svg") center bottom 22px / min(620px, 112vw) auto no-repeat,
      var(--color-bg);
  }

  .hero-inner {
    padding-top: 54px;
    padding-bottom: 240px;
  }

  h1 {
    font-size: clamp(3.7rem, 18vw, 5.5rem);
  }

  .section-inner,
  .section-inner.split {
    display: block;
    padding: 58px 0;
  }

  .diagram {
    margin-top: var(--space-5);
  }

  .point-grid,
  .flow-row,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }
}