/* ===================== DESIGN TOKENS ===================== */
:root {
  --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(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(2.75rem, 0.5rem + 6vw, 6.5rem);

  --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;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  --font-display: 'Cabinet Grotesk', 'General Sans', 'Helvetica Neue', sans-serif;
  --font-body: 'General Sans', 'Inter', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Geist Mono', ui-monospace, monospace;
}

/* Dark-tech palette. Primary = Kaspa-adjacent teal-green. Dark mode is the
   default identity for this brand (crypto infra product); light mode is a
   secondary, still-supported mode. */
:root,
[data-theme='dark'] {
  --color-bg: #0a0f0d;
  --color-surface: #0f1613;
  --color-surface-2: #131c18;
  --color-surface-offset: #17211c;
  --color-surface-offset-2: #1c2820;
  --color-surface-dynamic: #223026;
  --color-divider: #1e2a23;
  --color-border: #263429;

  --color-text: #eaf3ee;
  --color-text-muted: #90a89b;
  --color-text-faint: #56695f;
  --color-text-inverse: #0a0f0d;

  --color-primary: #49f2b3;
  --color-primary-hover: #6ff8c6;
  --color-primary-active: #2fd699;
  --color-primary-highlight: #163227;

  --color-warning: #f2b749;
  --color-warning-hover: #f7c96f;
  --color-warning-active: #d69c2f;
  --color-warning-highlight: #322a16;

  --color-error: #f2497d;
  --color-error-hover: #f76f96;
  --color-error-active: #d62f61;
  --color-error-highlight: #32161f;

  --color-success: #49f2b3;
  --color-success-hover: #6ff8c6;
  --color-success-active: #2fd699;
  --color-success-highlight: #163227;

  --color-blue: #49b8f2;
  --color-blue-hover: #6fc9f7;
  --color-blue-active: #2f9fd6;
  --color-blue-highlight: #16262f;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.35);
  --shadow-md: 0 8px 24px oklch(0 0 0 / 0.45);
  --shadow-lg: 0 20px 48px oklch(0 0 0 / 0.55);
}

[data-theme='light'] {
  --color-bg: #f6f9f7;
  --color-surface: #ffffff;
  --color-surface-2: #fbfdfc;
  --color-surface-offset: #eef4f1;
  --color-surface-offset-2: #e4ede8;
  --color-surface-dynamic: #d9e7e0;
  --color-divider: #dbe6e0;
  --color-border: #cddbd3;

  --color-text: #0c1712;
  --color-text-muted: #4c6156;
  --color-text-faint: #8ba095;
  --color-text-inverse: #f6f9f7;

  --color-primary: #06845c;
  --color-primary-hover: #056e4c;
  --color-primary-active: #04563c;
  --color-primary-highlight: #d5f0e3;

  --color-warning: #a4670a;
  --color-warning-hover: #855308;
  --color-warning-active: #663f06;
  --color-warning-highlight: #f2e3c6;

  --color-error: #b8134f;
  --color-error-hover: #950f40;
  --color-error-active: #720b31;
  --color-error-highlight: #f3d1de;

  --color-success: #06845c;
  --color-success-hover: #056e4c;
  --color-success-active: #04563c;
  --color-success-highlight: #d5f0e3;

  --color-blue: #0a72a8;
  --color-blue-hover: #085d89;
  --color-blue-active: #06486a;
  --color-blue-highlight: #d3e9f3;

  --shadow-sm: 0 1px 2px oklch(0.2 0.02 165 / 0.06);
  --shadow-md: 0 4px 16px oklch(0.2 0.02 165 / 0.08);
  --shadow-lg: 0 16px 40px oklch(0.2 0.02 165 / 0.12);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg: #f6f9f7;
    --color-surface: #ffffff;
    --color-surface-2: #fbfdfc;
    --color-surface-offset: #eef4f1;
    --color-surface-offset-2: #e4ede8;
    --color-surface-dynamic: #d9e7e0;
    --color-divider: #dbe6e0;
    --color-border: #cddbd3;
    --color-text: #0c1712;
    --color-text-muted: #4c6156;
    --color-text-faint: #8ba095;
    --color-text-inverse: #f6f9f7;
    --color-primary: #06845c;
    --color-primary-hover: #056e4c;
    --color-primary-active: #04563c;
    --color-primary-highlight: #d5f0e3;
    --color-warning: #a4670a;
    --color-error: #b8134f;
    --color-success: #06845c;
    --color-blue: #0a72a8;
    --shadow-sm: 0 1px 2px oklch(0.2 0.02 165 / 0.06);
    --shadow-md: 0 4px 16px oklch(0.2 0.02 165 / 0.08);
    --shadow-lg: 0 16px 40px oklch(0.2 0.02 165 / 0.12);
  }
}

/* ===================== LAYOUT PRIMITIVES ===================== */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
.container--default {
  max-width: var(--content-default);
}
.container--narrow {
  max-width: var(--content-narrow);
}

.section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
}
.section--tight {
  padding-block: clamp(var(--space-10), 5vw, var(--space-16));
}

/* Background grain / grid texture for hero + focal sections */
.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(oklch(from var(--color-primary) l c h / 0.06) 1px, transparent 1px),
    linear-gradient(90deg, oklch(from var(--color-primary) l c h / 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 90%);
  pointer-events: none;
}
.bg-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 10%, oklch(from var(--color-primary) l c h / 0.16), transparent 55%),
    radial-gradient(circle at 85% 30%, oklch(from var(--color-blue) l c h / 0.10), transparent 50%);
  pointer-events: none;
}

/* ===================== TYPE ===================== */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.2);
}

h1,
.h1 {
  font-family: var(--font-display);
  font-weight: 650;
  font-size: var(--text-hero);
  letter-spacing: -0.02em;
}
h2,
.h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-2xl);
  letter-spacing: -0.015em;
}
h3,
.h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
}
.lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 56ch;
}
.mono {
  font-family: var(--font-mono);
}
.text-muted {
  color: var(--color-text-muted);
}
.text-faint {
  color: var(--color-text-faint);
}
.accent {
  color: var(--color-primary);
}

/* ===================== NAV ===================== */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition-interactive);
}
.header--scrolled {
  box-shadow: var(--shadow-sm);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 650;
  font-size: var(--text-lg);
  color: var(--color-text);
  text-decoration: none;
}
.brand svg {
  width: 30px;
  height: 30px;
  color: var(--color-primary);
}
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.nav__links {
  display: flex;
  gap: var(--space-6);
}
.nav__links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}
.nav__links a:hover {
  color: var(--color-text);
}
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.icon-btn:hover {
  color: var(--color-text);
  border-color: var(--color-text-faint);
}
.nav__toggle {
  display: none;
}

/* ===================== BUTTONS ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
}
.btn--ghost {
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn--ghost:hover {
  border-color: var(--color-text-faint);
  background: var(--color-surface-offset);
}
.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* ===================== HERO ===================== */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(var(--space-20), 12vw, var(--space-32)) clamp(var(--space-16), 8vw, var(--space-24));
}
.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-6);
  max-width: 780px;
}
.hero h1 {
  margin-block: var(--space-5);
}
.hero__cta {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-4);
  flex-wrap: wrap;
}
.hero__meta {
  display: flex;
  gap: var(--space-6);
  margin-top: var(--space-10);
  flex-wrap: wrap;
}
.hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.hero__meta-item .value {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}
.hero__meta-item .label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ===================== LIVE STATS STRIP ===================== */
.stats-strip {
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface);
}
.stats-strip__inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  padding-block: var(--space-8);
}
.stat {
  padding-inline: var(--space-4);
  border-left: 1px solid var(--color-divider);
}
.stat:first-child {
  border-left: none;
}
.stat__value {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.stat__value .unit {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  font-weight: 500;
}
.stat__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: var(--space-2);
}
.stat__live-dot {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  display: inline-block;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 oklch(from var(--color-primary) l c h / 0.4); }
  50% { opacity: 0.7; box-shadow: 0 0 0 4px oklch(from var(--color-primary) l c h / 0); }
}
.stats-strip__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--space-6);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
}

/* ===================== SECTION HEADERS ===================== */
.section__header {
  max-width: 640px;
  margin-bottom: var(--space-12);
}
.section__header h2 {
  margin-top: var(--space-3);
}

/* ===================== HOW IT WORKS ===================== */
.flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.flow__step {
  position: relative;
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
}
.flow__step .num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  display: block;
}
.flow__step h3 {
  margin-bottom: var(--space-3);
}
.flow__step p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ===================== COMPARISON TABLE ===================== */
.compare {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
}
.compare table {
  width: 100%;
  min-width: 640px;
}
.compare th,
.compare td {
  text-align: left;
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--color-divider);
}
.compare th {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
  font-weight: 500;
}
.compare tbody tr:last-child td {
  border-bottom: none;
}
.compare td.brand {
  font-weight: 600;
  color: var(--color-text);
}
.compare td.us {
  color: var(--color-primary);
  font-weight: 600;
}
.compare tr.us-row {
  background: oklch(from var(--color-primary) l c h / 0.06);
}

/* ===================== CARDS / FEATURE GRID ===================== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}
.card {
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
}
.card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
}
.card h3 {
  margin-bottom: var(--space-2);
}
.card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ===================== CODE / TERMINAL PANEL ===================== */
.terminal {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: #070b09;
  box-shadow: var(--shadow-lg);
}
.terminal__bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-offset);
  border-bottom: 1px solid var(--color-border);
}
.terminal__dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background: var(--color-text-faint);
}
.terminal__title {
  margin-left: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.terminal__body {
  padding: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.8;
  overflow-x: auto;
  color: #cdeee0;
}
.terminal__body .prompt {
  color: var(--color-text-faint);
}
.terminal__body .ok {
  color: var(--color-primary);
}
.terminal__body .comment {
  color: var(--color-text-faint);
}

/* ===================== CTA / ONRAMP ===================== */
.cta-panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  padding: clamp(var(--space-10), 6vw, var(--space-16));
  text-align: center;
  background: var(--color-surface);
}
.cta-panel h2 {
  margin-bottom: var(--space-4);
}
.cta-panel .lede {
  margin-inline: auto;
  margin-bottom: var(--space-8);
}
.cta-panel__actions {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ===================== FOOTER ===================== */
.footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-16) var(--space-10);
}
.footer__top {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}
.footer__brand p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-top: var(--space-4);
  max-width: 32ch;
}
.footer__col h4 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}
.footer__col ul {
  display: grid;
  gap: var(--space-3);
}
.footer__col a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}
.footer__col a:hover {
  color: var(--color-text);
}
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* ===================== BADGE ===================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}
.badge--live {
  color: var(--color-primary);
  border-color: oklch(from var(--color-primary) l c h / 0.35);
  background: var(--color-primary-highlight);
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 960px) {
  .footer__top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .nav__links,
  .nav__actions .btn--ghost {
    display: none;
  }
  .flow,
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .stats-strip__inner {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat:nth-child(3) {
    border-left: none;
  }
  .stat {
    padding-block: var(--space-2);
  }
  .footer__top {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 600px) {
  .stats-strip__inner {
    grid-template-columns: 1fr 1fr;
  }
  .hero__meta {
    gap: var(--space-6) var(--space-8);
  }
  .cta-panel__actions {
    flex-direction: column;
  }
  .cta-panel__actions .btn {
    width: 100%;
  }
}