@font-face {
  font-family: "Space Grotesk";
  src: url("../fonts/space-grotesk-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans";
  src: url("../fonts/ibm-plex-sans-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
}

:root {
  --bg: #0d1418;
  --bg-alt: #162126;
  --surface: rgba(22, 33, 38, 0.82);
  --surface-strong: #18242a;
  --text: #e7ece8;
  --text-muted: #b5c1bc;
  --line: rgba(82, 98, 106, 0.55);
  --accent: #63d6a3;
  --accent-soft: rgba(99, 214, 163, 0.14);
  --warm: #e88e52;
  --warm-soft: rgba(232, 142, 82, 0.14);
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.28);
  --radius: 28px;
  --radius-sm: 18px;
  --shell: min(1120px, calc(100vw - 32px));
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(99, 214, 163, 0.16), transparent 30%),
    radial-gradient(circle at top right, rgba(232, 142, 82, 0.14), transparent 28%),
    linear-gradient(180deg, #0d1418 0%, #10191d 100%);
}

.site-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(82, 98, 106, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(82, 98, 106, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.8), transparent 95%);
}

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

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

button,
input,
summary {
  font: inherit;
}

button,
input,
a,
summary {
  transition: transform 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(99, 214, 163, 0.75);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 16px;
  transform: translateY(-160%);
  z-index: 50;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--bg);
  font-weight: 700;
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: var(--shell);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(13, 20, 24, 0.72);
  border-bottom: 1px solid rgba(82, 98, 106, 0.22);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 84px;
}

.brandmark {
  width: min(220px, 52vw);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.site-nav a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--text);
  background: rgba(231, 236, 232, 0.06);
}

.section {
  padding: 34px 0 0;
}

.hero {
  display: grid;
  gap: 24px;
  padding: 40px 0 12px;
}

.hero-copy,
.hero-panel,
.panel,
.simple-card,
.legal-card,
.guide-intro {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 30%),
    rgba(22, 33, 38, 0.78);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: clamp(28px, 5vw, 52px);
}

.hero-copy::after,
.guide-cta::after,
.pricing-card::after {
  content: "";
  position: absolute;
  inset: auto -10% -30% auto;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 214, 163, 0.18), transparent 70%);
}

.hero-panel {
  padding: 28px;
}

.eyebrow,
.panel-kicker {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  line-height: 1.02;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.8rem, 7vw, 5.2rem);
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  letter-spacing: -0.03em;
}

h3 {
  font-size: 1.35rem;
}

p,
li {
  color: var(--text-muted);
  font-size: 1.03rem;
  line-height: 1.72;
}

.lede {
  max-width: 60ch;
  font-size: clamp(1.08rem, 2.2vw, 1.28rem);
  color: var(--text);
}

.secondary-lede {
  margin: 20px 0 0;
  color: var(--text-muted);
}

.secondary-lede span {
  display: block;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 4px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
}

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

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

.button-primary:hover {
  background: #f39a61;
}

.button-secondary {
  border-color: rgba(231, 236, 232, 0.18);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
}

.text-link {
  color: var(--accent);
  font-weight: 600;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
}

.trust-strip li,
.check-list li {
  position: relative;
  padding: 14px 16px 14px 42px;
  border: 1px solid rgba(82, 98, 106, 0.32);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
  line-height: 1.45;
}

.trust-strip li::before,
.check-list li::before,
.trust-list li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 20px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(99, 214, 163, 0.14);
}

.signal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 24px 0 0;
}

.signal-grid div {
  padding: 14px;
  border-radius: var(--radius-sm);
  background: rgba(13, 20, 24, 0.52);
  border: 1px solid rgba(82, 98, 106, 0.3);
}

.signal-grid dt {
  color: var(--text-muted);
  font-size: 0.88rem;
}

.signal-grid dd {
  margin: 10px 0 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.12rem;
}

.section-head {
  max-width: 720px;
  margin-bottom: 22px;
}

.feature-grid,
.step-grid,
.pricing-grid,
.trust-grid,
.footer-grid,
.guide-layout {
  display: grid;
  gap: 20px;
}

.panel {
  padding: 26px;
}

.feature-index,
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 48px;
  margin: 0 0 18px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.feature-index {
  background: var(--accent-soft);
  color: var(--accent);
}

.step-number {
  background: var(--warm-soft);
  color: var(--warm);
}

.guide-cta {
  display: grid;
  gap: 18px;
  align-items: center;
}

.pricing-card h2,
.launch-card h2 {
  margin-bottom: 18px;
}

.check-list,
.trust-list,
.footer-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list {
  display: grid;
  gap: 12px;
}

.fine-print {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid rgba(82, 98, 106, 0.34);
}

.fine-print p,
.muted {
  font-size: 0.95rem;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border: 1px solid rgba(82, 98, 106, 0.36);
  border-radius: 22px;
  background: rgba(22, 33, 38, 0.66);
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 22px;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--text);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--accent);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item div {
  padding: 0 22px 18px;
}

.trust-list {
  display: grid;
  gap: 14px;
}

.trust-list li {
  position: relative;
  padding-left: 42px;
}

.trust-list strong {
  color: var(--text);
}

.site-footer {
  padding: 36px 0 42px;
}

.footer-grid {
  grid-template-columns: 2fr 1fr 1fr 1fr;
  padding: 26px 0 0;
  border-top: 1px solid rgba(82, 98, 106, 0.26);
}

.footer-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  color: var(--text);
}

.footer-list li,
.footer-tagline {
  margin-bottom: 10px;
}

.simple-shell,
.legal-shell {
  padding-top: 48px;
  padding-bottom: 30px;
}

.simple-card,
.legal-card {
  padding: clamp(28px, 4vw, 44px);
}

.simple-card code,
.legal-card code {
  padding: 0.18rem 0.42rem;
  border-radius: 0.5rem;
  background: rgba(13, 20, 24, 0.6);
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.92em;
}

.signup-form {
  margin: 28px 0 0;
}

.signup-form label {
  display: block;
  margin-bottom: 10px;
  color: var(--text);
  font-weight: 600;
}

.signup-row {
  display: grid;
  gap: 12px;
}

.signup-row input {
  min-height: 52px;
  padding: 0 16px;
  border: 1px solid rgba(82, 98, 106, 0.48);
  border-radius: 16px;
  background: rgba(13, 20, 24, 0.55);
  color: var(--text);
}

.download-note {
  margin-top: 20px;
}

.download-hash,
.download-requirements {
  margin: 18px 0 0;
  padding: 18px 20px;
  border: 1px solid rgba(82, 98, 106, 0.36);
  border-radius: 18px;
  background: rgba(13, 20, 24, 0.55);
}

.download-hash {
  overflow-x: auto;
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.95rem;
  line-height: 1.55;
}

.download-steps,
.requirements-list {
  padding-left: 1.35rem;
}

.download-steps li + li,
.requirements-list li + li {
  margin-top: 0.75rem;
}

.download-callout {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid rgba(82, 98, 106, 0.36);
}

.guide-shell {
  padding-top: 38px;
  padding-bottom: 18px;
}

.guide-intro {
  margin-bottom: 20px;
  padding: clamp(24px, 4vw, 40px);
}

.guide-intro h1 {
  font-size: clamp(2rem, 7.8vw, 4.4rem);
  line-height: 1.06;
  hyphens: auto;
}

.guide-prose h1 {
  font-size: clamp(2.1rem, 8vw, 4.75rem);
  line-height: 1.06;
}

.guide-layout {
  align-items: start;
}

.guide-sidebar {
  position: relative;
}

.toc-box {
  position: sticky;
  top: 110px;
  border: 1px solid rgba(82, 98, 106, 0.36);
  border-radius: 24px;
  background: rgba(22, 33, 38, 0.74);
  padding: 18px 20px;
}

.toc-box summary {
  cursor: pointer;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.05rem;
}

.toc-box ol {
  margin: 16px 0 0;
  padding-left: 18px;
}

.toc-box li {
  margin-bottom: 10px;
  color: var(--text-muted);
}

.toc-box .toc-level-3 {
  margin-left: 12px;
  font-size: 0.95rem;
}

.guide-prose {
  padding: clamp(26px, 4vw, 48px);
}

.prose {
  max-width: 100%;
}

.prose > * + * {
  margin-top: 1rem;
}

.prose h2,
.prose h3,
.prose h4 {
  scroll-margin-top: 110px;
}

.prose h2 {
  margin-top: 2.6rem;
}

.prose h3 {
  margin-top: 2rem;
}

.prose p,
.prose li {
  max-width: 68ch;
  font-size: 1.08rem;
  line-height: 1.82;
}

.prose ul,
.prose ol {
  padding-left: 1.35rem;
}

.prose li + li {
  margin-top: 0.45rem;
}

.prose blockquote {
  margin: 1.4rem 0;
  padding: 1rem 1.2rem;
  border-left: 4px solid var(--warm);
  background: rgba(232, 142, 82, 0.08);
  border-radius: 0 18px 18px 0;
}

.prose strong {
  color: var(--text);
}

.prose code {
  padding: 0.18rem 0.42rem;
  border-radius: 0.5rem;
  background: rgba(13, 20, 24, 0.6);
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.92em;
}

.guide-bottom-cta {
  margin-top: 2.6rem;
  padding-top: 1.8rem;
  border-top: 1px solid rgba(82, 98, 106, 0.36);
}

@media (min-width: 760px) {
  .hero,
  .pricing-grid,
  .guide-cta,
  .feature-grid,
  .step-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .signup-row {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 960px) {
  .hero {
    grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.95fr);
    align-items: stretch;
  }

  .feature-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .pricing-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .trust-grid,
  .guide-layout {
    grid-template-columns: minmax(230px, 0.33fr) minmax(0, 0.67fr);
  }
}

@media (max-width: 959px) {
  .trust-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 719px) {
  .header-row {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .brandmark {
    width: min(200px, 70vw);
  }

  .trust-strip {
    grid-template-columns: 1fr;
  }

  .panel,
  .simple-card,
  .legal-card,
  .guide-intro,
  .hero-copy,
  .hero-panel {
    padding: 22px;
  }

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

  .toc-box {
    position: static;
  }
}
