/* Binary (Built on Binary) — public site
   Charcoal + mint signal. Ship-ready for Cloudflare Pages. */

:root {
  --bg: #080a0e;
  --bg-elev: #10141c;
  --bg-card: #141922;
  --line: #2a3140;
  --line-strong: #3a4458;
  --text: #eef1f7;
  --muted: #9aa3b5;
  --faint: #6b7385;
  --accent: #56e0a0;
  --accent-soft: #8af0bd;
  --accent-dim: rgba(86, 224, 160, 0.12);
  --accent-ink: #080a0e;
  --radius: 14px;
  --wrap: 1120px;
  --font: "IBM Plex Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  --space-section: clamp(3.5rem, 7vw, 5.5rem);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(1100px 520px at 8% -8%, rgba(86, 224, 160, 0.09), transparent 55%),
    radial-gradient(800px 420px at 96% 4%, rgba(90, 120, 255, 0.07), transparent 48%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-soft);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.5rem 0.75rem;
  z-index: 100;
}

.skip:focus {
  left: 0.75rem;
  top: 0.75rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.wrap {
  width: min(100% - 2.25rem, var(--wrap));
  margin-inline: auto;
}

.muted-inline {
  color: var(--faint);
  font-weight: 400;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(8, 10, 14, 0.86);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.25rem;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  text-decoration: none;
}

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

.logo-mark {
  display: inline-grid;
  place-items: center;
  width: 2.15rem;
  height: 2.15rem;
  border-radius: 7px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(160deg, var(--bg-elev), var(--bg-card));
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 600;
  flex-shrink: 0;
}

.logo-stack {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
  line-height: 1.1;
}

.logo-name {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.03em;
}

.logo-formal {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--faint);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.94rem;
  font-weight: 500;
}

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

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-elev);
  cursor: pointer;
  position: relative;
}

.nav-toggle span:not(.sr-only),
.nav-toggle span:not(.sr-only)::before,
.nav-toggle span:not(.sr-only)::after {
  content: "";
  position: absolute;
  left: 0.55rem;
  right: 0.55rem;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
}

.nav-toggle span:not(.sr-only) {
  top: 50%;
  transform: translateY(-50%);
}

.nav-toggle span:not(.sr-only)::before {
  top: -6px;
}

.nav-toggle span:not(.sr-only)::after {
  top: 6px;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  line-height: 1.2;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn:hover {
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line-strong);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: transparent;
}

.btn-sm {
  padding: 0.5rem 0.95rem;
  font-size: 0.88rem;
}

.text-link {
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

/* Hero */

.hero {
  padding: clamp(3.25rem, 8vw, 5.75rem) 0 2.75rem;
}

.hero-inner {
  max-width: 44rem;
}

.eyebrow {
  margin: 0 0 1rem;
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
}

h1,
h2,
h3 {
  letter-spacing: -0.03em;
  line-height: 1.12;
  font-weight: 700;
}

h1 {
  margin: 0 0 1.35rem;
  font-size: clamp(2.15rem, 5vw, 3.35rem);
  display: flex;
  flex-direction: column;
  gap: 0.2em;
}

.hero-line {
  display: block;
}

.hero-line-accent {
  color: var(--accent);
}

h2 {
  margin: 0 0 0.9rem;
  font-size: clamp(1.65rem, 3.2vw, 2.25rem);
}

h3 {
  margin: 0 0 0.55rem;
  font-size: 1.12rem;
  letter-spacing: -0.02em;
}

.lede,
.section-lede {
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.5vw, 1.15rem);
  line-height: 1.65;
  max-width: 38rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.hero-note {
  margin: 1.4rem 0 0;
  color: var(--faint);
  font-size: 0.92rem;
  max-width: 36rem;
}

.band-tight {
  padding: 0 0 3rem;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.pill {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 500;
}

/* Sections */

.section {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--line);
}

.section-alt {
  background: linear-gradient(180deg, rgba(16, 20, 28, 0.7), transparent 70%);
}

.section-head {
  margin-bottom: 2.25rem;
  max-width: 40rem;
}

.section-head .section-lede {
  margin-top: 0.85rem;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
}

.steps li {
  padding: 1.4rem 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
}

.step-num {
  display: block;
  margin-bottom: 0.9rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.steps p,
.card p,
.offer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.callout {
  margin-top: 1.75rem;
  padding: 1.35rem 1.45rem;
  border-radius: var(--radius);
  border: 1px dashed rgba(86, 224, 160, 0.35);
  background: var(--accent-dim);
}

.callout h3 {
  margin-bottom: 0.7rem;
}

.plain-list {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.plain-list li + li {
  margin-top: 0.3rem;
}

/* Cards / samples */

.card-grid,
.offer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.1rem;
}

.card,
.offer {
  padding: 1.5rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.card-kicker,
.offer-step {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--faint);
  font-weight: 500;
}

.card .text-link {
  margin-top: auto;
  align-self: flex-start;
  padding-top: 0.35rem;
}

.offer-price {
  margin: 0;
  font-family: var(--mono);
  font-size: 1.4rem;
  color: var(--text);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.offer-price span {
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 500;
}

.offer ul {
  margin: 0.35rem 0 0;
  padding-left: 1.15rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.offer ul li + li {
  margin-top: 0.35rem;
}

.offer-featured {
  border-color: rgba(86, 224, 160, 0.5);
  box-shadow:
    0 0 0 1px rgba(86, 224, 160, 0.1),
    0 20px 48px rgba(0, 0, 0, 0.28);
  background:
    linear-gradient(180deg, rgba(86, 224, 160, 0.1), transparent 42%),
    var(--bg-card);
  position: relative;
}

.offer-badge {
  margin: 0;
  align-self: flex-start;
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* Contact */

.contact-inner {
  max-width: 42rem;
}

.contact-card {
  margin-top: 0.35rem;
  padding: 1.65rem 1.55rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-card);
}

.contact-dl {
  margin: 0 0 1.35rem;
  display: grid;
  gap: 1rem;
}

.contact-dl div {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: 0.75rem;
  align-items: baseline;
}

.contact-dl dt {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--faint);
  font-weight: 500;
}

.contact-dl dd {
  margin: 0;
  color: var(--text);
  font-weight: 500;
}

.contact-dl a {
  text-decoration: none;
  font-weight: 600;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.25rem 0 2.75rem;
}

.footer-inner {
  display: grid;
  gap: 0.45rem;
}

.footer-brand {
  margin: 0 0 0.35rem;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.footer-brand > span:last-child {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  line-height: 1.15;
}

.footer-name {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.footer-formal {
  font-size: 0.72rem;
  color: var(--faint);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.footer-meta {
  margin: 0;
  color: var(--faint);
  font-size: 0.88rem;
}

.footer-meta a {
  color: var(--muted);
  text-decoration: none;
}

.footer-meta a:hover {
  color: var(--accent);
}

/* Responsive */

@media (max-width: 900px) {
  .steps,
  .card-grid,
  .offer-grid {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.85rem 1.15rem 1.15rem;
    background: rgba(8, 10, 14, 0.98);
    border-bottom: 1px solid var(--line);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 0.8rem 0.25rem;
    border-bottom: 1px solid var(--line);
  }

  .site-nav .btn {
    margin-top: 0.85rem;
    width: 100%;
  }

  .contact-dl div {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }
}

@media (min-width: 901px) and (max-width: 1024px) {
  .steps,
  .card-grid,
  .offer-grid {
    gap: 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn {
    transition: none;
  }
}