:root {
  --bg: #071722;
  --bg-elevated: #0d2231;
  --bg-soft: #113247;
  --line: rgba(154, 237, 214, 0.18);
  --text: #e8fbf6;
  --text-soft: #b6ddd3;
  --mint: #9aedcf;
  --teal: #46c7bd;
  --teal-strong: #2da9a1;
  --warning: #ffd38a;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --content-width: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI Variable", "Aptos", "Trebuchet MS", sans-serif;
  background:
    radial-gradient(circle at top right, rgba(70, 199, 189, 0.22), transparent 24%),
    radial-gradient(circle at left 20%, rgba(154, 237, 207, 0.12), transparent 28%),
    linear-gradient(180deg, #05131d 0%, #071722 52%, #081b29 100%);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--mint);
}

a:hover,
a:focus-visible {
  color: #c6fff0;
}

img {
  max-width: 100%;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--mint);
  color: #05212a;
  font-weight: 700;
  z-index: 10;
}

.skip-link:focus {
  top: 1rem;
}

.site-shell {
  width: min(calc(100% - 2rem), var(--content-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(16px);
  background: rgba(7, 23, 34, 0.84);
  border-bottom: 1px solid rgba(154, 237, 214, 0.08);
}

.site-header-inner {
  width: min(calc(100% - 2rem), var(--content-width));
  margin: 0 auto;
  padding: 1rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  text-decoration: none;
  color: var(--text);
}

.brand-title {
  display: block;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.brand-subtitle {
  display: block;
  font-size: 0.88rem;
  color: var(--text-soft);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.site-nav a {
  text-decoration: none;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  color: var(--text-soft);
  border: 1px solid transparent;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a[aria-current="page"] {
  color: var(--text);
  border-color: rgba(154, 237, 214, 0.24);
  background: rgba(70, 199, 189, 0.08);
}

.page {
  padding: 3.5rem 0 4rem;
}

.hero,
.panel,
.faq-item,
.list-card {
  background: linear-gradient(180deg, rgba(17, 50, 71, 0.84), rgba(10, 31, 45, 0.96));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero {
  padding: 2.5rem;
  border-radius: 32px;
  margin-bottom: 1.5rem;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 0.85rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(70, 199, 189, 0.12);
  color: var(--mint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 700;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: 0.85rem;
}

.lead {
  font-size: 1.08rem;
  color: var(--text-soft);
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.4rem;
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.1rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
}

.button-link.primary {
  background: linear-gradient(135deg, var(--mint), var(--teal));
  color: #04212a;
}

.button-link.secondary {
  border: 1px solid rgba(154, 237, 214, 0.24);
  color: var(--text);
  background: rgba(8, 27, 41, 0.55);
}

.grid {
  display: grid;
  gap: 1rem;
}

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

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

.panel,
.list-card,
.faq-item {
  padding: 1.35rem;
  border-radius: var(--radius-lg);
}

.panel p,
.faq-item p,
.list-card p,
.list-card li {
  color: var(--text-soft);
}

.feature-list,
.check-list,
.plain-list {
  margin: 0;
  padding-left: 1.15rem;
}

.note {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-left: 4px solid var(--warning);
  background: rgba(255, 211, 138, 0.08);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: #fff0c9;
}

.section-heading {
  margin: 2.4rem 0 1rem;
}

.site-footer {
  border-top: 1px solid rgba(154, 237, 214, 0.12);
  padding: 1.5rem 0 2.5rem;
  color: var(--text-soft);
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}

.muted {
  color: var(--text-soft);
}

.contact-highlight {
  font-size: 1.1rem;
  font-weight: 700;
}

.version-list {
  display: grid;
  gap: 1rem;
}

.version-meta {
  display: inline-block;
  margin-bottom: 0.65rem;
  color: var(--mint);
  font-weight: 700;
}

.faq-item + .faq-item {
  margin-top: 1rem;
}

code {
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 0.94em;
  color: #d3fff2;
}

@media (max-width: 860px) {
  .site-header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .grid.columns-3,
  .grid.columns-2 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 1.6rem;
  }
}

@media (max-width: 560px) {
  .page {
    padding-top: 2rem;
  }

  .site-shell {
    width: min(calc(100% - 1rem), var(--content-width));
  }

  .site-header-inner {
    width: min(calc(100% - 1rem), var(--content-width));
  }

  .site-nav {
    gap: 0.4rem;
  }

  .site-nav a {
    padding: 0.5rem 0.75rem;
  }
}