:root,
[data-theme='light'] {
  --font-display: 'Cabinet Grotesk', 'Inter', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;

  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2.25rem, 1.35rem + 4vw, 5.5rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --color-bg: #f3f2eb;
  --color-surface: #fbfaf5;
  --color-surface-2: #e7eee9;
  --color-surface-offset: #dfe8e2;
  --color-text: #111c1b;
  --color-text-muted: #5b6662;
  --color-text-faint: #8e9791;
  --color-text-inverse: #f7fff9;
  --color-primary: #087369;
  --color-primary-hover: #04564f;
  --color-primary-highlight: #d1ebe4;
  --color-border: #cbd6cf;
  --color-line: rgba(17, 28, 27, 0.14);
  --shadow-sm: 0 1px 2px rgba(17, 28, 27, 0.07);
  --shadow-lg: 0 24px 80px rgba(17, 28, 27, 0.14);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  --content-wide: 1180px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme='dark'] {
  --color-bg: #071716;
  --color-surface: #0d2320;
  --color-surface-2: #11312d;
  --color-surface-offset: #163a35;
  --color-text: #e5f4ee;
  --color-text-muted: #a9bbb5;
  --color-text-faint: #70817b;
  --color-text-inverse: #071716;
  --color-primary: #90f2e3;
  --color-primary-hover: #63d9c7;
  --color-primary-highlight: #173f39;
  --color-border: #244a44;
  --color-line: rgba(229, 244, 238, 0.15);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 24px 80px rgba(0, 0, 0, 0.38);
}

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

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background:
    radial-gradient(circle at 80% 0%, color-mix(in oklab, var(--color-primary), transparent 78%), transparent 32rem),
    linear-gradient(180deg, var(--color-bg), color-mix(in oklab, var(--color-bg), var(--color-surface-2) 20%));
}

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

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

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

::selection {
  background: color-mix(in oklab, var(--color-primary), transparent 72%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) clamp(var(--space-4), 5vw, var(--space-10));
  border-bottom: 1px solid var(--color-line);
  background: color-mix(in oklab, var(--color-bg), transparent 8%);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  color: var(--color-primary);
}

.brand-shell,
.brand-line {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 3;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
}

.nav a:hover {
  color: var(--color-text);
}

.theme-toggle {
  display: grid;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  color: var(--color-text);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-full);
  background: var(--color-surface);
}

.section {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: clamp(var(--space-12), 8vw, var(--space-24)) clamp(var(--space-4), 5vw, var(--space-10));
}

.hero {
  display: grid;
  min-height: calc(100dvh - 5rem);
  grid-template-columns: minmax(0, 1.12fr) minmax(18rem, 0.88fr);
  align-items: center;
  gap: clamp(var(--space-10), 7vw, var(--space-20));
}

.hero-copy {
  display: grid;
  gap: var(--space-6);
}

.eyebrow,
.section-kicker {
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.055em;
  text-wrap: balance;
}

h1 {
  max-width: 11ch;
  font-size: var(--text-2xl);
}

h2 {
  font-size: var(--text-xl);
}

h3 {
  font-size: var(--text-lg);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

p {
  max-width: 68ch;
  color: var(--color-text-muted);
}

.lede {
  max-width: 58ch;
  color: var(--color-text);
  font-size: var(--text-lg);
  line-height: 1.4;
}

.hero-actions,
.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

.button {
  display: inline-flex;
  min-height: 2.9rem;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 800;
  line-height: 1;
  transition:
    background var(--transition-interactive),
    color var(--transition-interactive),
    border-color var(--transition-interactive),
    transform var(--transition-interactive);
}

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

.button.primary {
  color: var(--color-text-inverse);
  background: var(--color-primary);
}

[data-theme='dark'] .button.primary {
  color: #06201d;
}

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

.button.secondary {
  color: var(--color-text);
  border: 1px solid var(--color-line);
  background: var(--color-surface);
}

.system-card {
  position: relative;
  overflow: hidden;
  padding: var(--space-6);
  border: 1px solid var(--color-line);
  border-radius: calc(var(--radius-xl) + var(--space-3));
  background:
    linear-gradient(145deg, color-mix(in oklab, var(--color-surface), var(--color-primary) 5%), var(--color-surface)),
    var(--color-surface);
  box-shadow: var(--shadow-lg);
}

.system-card::before {
  position: absolute;
  inset: -40% -20% auto auto;
  width: 18rem;
  height: 18rem;
  content: '';
  border-radius: 999px;
  background: color-mix(in oklab, var(--color-primary), transparent 72%);
  filter: blur(36px);
}

.card-topline,
.audit-strip {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.live-dot {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
}

.live-dot::before {
  width: 0.5rem;
  height: 0.5rem;
  content: '';
  border-radius: 999px;
  background: currentColor;
  box-shadow: 0 0 0 0.35rem color-mix(in oklab, var(--color-primary), transparent 82%);
}

.stack-map {
  position: relative;
  display: grid;
  gap: var(--space-4);
  padding-block: var(--space-10);
}

.node {
  position: relative;
  padding: var(--space-5);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: color-mix(in oklab, var(--color-surface), var(--color-bg) 16%);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.node.protocol {
  color: var(--color-text-inverse);
  background: var(--color-text);
}

[data-theme='dark'] .node.protocol {
  color: #071716;
  background: var(--color-primary);
}

.pipe {
  width: 2px;
  height: var(--space-8);
  margin-inline: var(--space-6);
  background: linear-gradient(var(--color-primary), transparent);
}

.audit-strip {
  flex-wrap: wrap;
  justify-content: flex-start;
}

.audit-strip span,
.market-list span {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-full);
  background: color-mix(in oklab, var(--color-surface), transparent 8%);
}

.audit-strip span {
  padding: var(--space-2) var(--space-3);
}

.thesis {
  border-block: 1px solid var(--color-line);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1fr);
  gap: clamp(var(--space-8), 7vw, var(--space-20));
  align-items: start;
  margin-top: var(--space-5);
}

.split p {
  color: var(--color-text);
  font-size: var(--text-lg);
  line-height: 1.42;
}

.rails {
  display: grid;
  gap: var(--space-6);
}

.rail-card {
  padding: clamp(var(--space-6), 5vw, var(--space-12));
  border: 1px solid var(--color-line);
  border-radius: calc(var(--radius-xl) + var(--space-2));
  background: var(--color-surface);
}

.primary-rail {
  display: grid;
  gap: var(--space-5);
  background:
    linear-gradient(135deg, color-mix(in oklab, var(--color-primary), transparent 88%), transparent),
    var(--color-surface);
}

.primary-rail h2 {
  max-width: 17ch;
}

.rail-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
}

.rail-grid article {
  display: grid;
  align-content: start;
  gap: var(--space-4);
  min-height: 18rem;
  padding: var(--space-5);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  background: color-mix(in oklab, var(--color-surface), transparent 4%);
}

.rail-grid span {
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 900;
  letter-spacing: 0.16em;
}

.market {
  display: grid;
  gap: var(--space-8);
}

.market-header {
  display: grid;
  gap: var(--space-4);
}

.market-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.market-list span {
  padding: var(--space-3) var(--space-4);
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 800;
}

.signup {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(20rem, 1fr);
  gap: clamp(var(--space-8), 7vw, var(--space-20));
  align-items: start;
}

.signup-copy {
  display: grid;
  gap: var(--space-5);
}

.signup-form {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-5);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.signup-form label {
  color: var(--color-text);
  font-size: var(--text-xs);
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.signup-form input,
.signup-form textarea {
  width: 100%;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  color: var(--color-text);
}

.signup-form input {
  min-height: 3rem;
  flex: 1 1 14rem;
  padding: 0 var(--space-4);
}

.signup-form textarea {
  min-height: 7rem;
  resize: vertical;
  padding: var(--space-4);
}

.signup-form input::placeholder,
.signup-form textarea::placeholder {
  color: var(--color-text-faint);
}

.form-note {
  font-size: var(--text-xs);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-8) clamp(var(--space-4), 5vw, var(--space-10));
  border-top: 1px solid var(--color-line);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

@media (max-width: 900px) {
  .hero,
  .split,
  .signup {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .nav {
    display: none;
  }

  .hero {
    min-height: auto;
  }

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

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

  .form-row .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}