@font-face {
  font-family: "Inter";
  src: url("/assets/fonts/Inter-Regular.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("/assets/fonts/Inter-SemiBold.ttf") format("truetype");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("/assets/fonts/Inter-Bold.ttf") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --background: #0b0f1a;
  --background-elevated: #0e1426;
  --surface: #151a2e;
  --surface-muted: #1a2038;
  --surface-light: #1e2440;
  --surface-border: #252d4a;
  --primary: #00e5cc;
  --primary-muted: #00b8a3;
  --secondary: #5b8def;
  --danger: #ff6b6b;
  --warning: #ffbb5c;
  --text-primary: #f0f2f5;
  --text-secondary: #8892a8;
  --text-tertiary: #5a6478;
  --shadow: rgb(0 0 0 / 32%);
  --max-width: 920px;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--background);
  overflow-y: scroll;
}

body {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  margin: 0;
  color: var(--text-primary);
  background: linear-gradient(180deg, var(--background) 0%, var(--background-elevated) 48%, var(--background) 100%);
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: var(--primary);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover,
a:focus-visible {
  color: var(--text-primary);
}

.site-shell {
  width: min(100% - 32px, var(--max-width));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--surface-border);
  background: rgb(14 20 38 / 88%);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.brand {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: 0;
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  box-shadow: 0 10px 24px rgb(0 229 204 / 14%);
}

.brand-copy {
  display: grid;
  gap: 0;
}

.brand-copy span {
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  font-size: 13px;
  font-weight: 600;
}

.nav a {
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--text-secondary);
  text-decoration: none;
}

.nav a:hover,
.nav a:focus-visible,
.nav a[aria-current="page"] {
  border-color: rgb(0 229 204 / 28%);
  color: var(--text-primary);
  background: linear-gradient(135deg, rgb(0 229 204 / 14%), rgb(91 141 239 / 8%));
}

main {
  flex: 1 0 auto;
  padding: 56px 0 48px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
}

h1 {
  max-width: 780px;
  margin: 0 0 18px;
  color: var(--text-primary);
  font-size: 4.8rem;
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin: 42px 0 12px;
  color: var(--text-primary);
  font-size: 1.28rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0;
}

p {
  margin: 0 0 18px;
  color: var(--text-secondary);
}

ul,
ol {
  margin: 0 0 24px;
  padding-left: 1.3rem;
}

li {
  margin: 0 0 8px;
  color: var(--text-secondary);
}

li::marker {
  color: var(--text-primary);
}

main > h2,
main > p:not(.lead):not(.eyebrow),
main > ul,
main > ol,
.contact-box,
.notice {
  max-width: 780px;
}

.lead {
  max-width: 740px;
  color: var(--text-secondary);
  font-size: 1.08rem;
}

.meta {
  margin: 24px 0 0;
  color: var(--text-tertiary);
  font-size: 0.92rem;
}

.page-list {
  display: grid;
  gap: 14px;
  margin-top: 34px;
}

.page-card {
  display: grid;
  min-height: 158px;
  padding: 18px;
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  background:
    linear-gradient(180deg, rgb(255 255 255 / 5%), transparent 36%),
    linear-gradient(135deg, var(--surface), rgb(30 36 64 / 50%));
  box-shadow: 0 10px 24px var(--shadow);
  color: var(--text-primary);
  text-decoration: none;
}

.page-card:hover,
.page-card:focus-visible {
  border-color: rgb(0 229 204 / 45%);
}

.card-icon {
  display: inline-grid;
  width: 42px;
  height: 42px;
  margin-bottom: 16px;
  place-items: center;
  border: 1px solid rgb(0 229 204 / 28%);
  border-radius: 12px;
  color: var(--primary);
  background: linear-gradient(135deg, rgb(0 229 204 / 16%), rgb(91 141 239 / 9%));
  line-height: 0;
}

.card-icon svg,
.inline-icon {
  display: block;
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

.page-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--text-primary);
  font-size: 1rem;
}

.page-card > span:not(.card-icon) {
  display: block;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.5;
}

.notice {
  margin: 30px 0;
  padding: 18px;
  border: 1px solid rgb(255 187 92 / 28%);
  border-radius: 16px;
  background: rgb(255 187 92 / 7%);
  color: var(--text-primary);
}

.contact-box {
  margin: 26px 0;
  padding: 22px;
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  background:
    linear-gradient(180deg, rgb(255 255 255 / 5%), transparent 42%),
    var(--surface);
  box-shadow: 0 10px 24px var(--shadow);
}

.contact-box h2 {
  margin-top: 0;
}

.site-footer {
  border-top: 1px solid var(--surface-border);
  color: var(--text-tertiary);
  background: rgb(14 20 38 / 88%);
  font-size: 14px;
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 12px 18px;
  align-items: center;
  padding: 24px 0;
}

.footer-meta {
  text-align: center;
}

.footer-contact {
  justify-self: end;
}

@media (max-width: 720px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

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

  main {
    padding-top: 42px;
  }

  h1 {
    font-size: 3.35rem;
  }

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

  .footer-meta {
    text-align: left;
  }

  .footer-contact {
    justify-self: start;
  }
}

@media (max-width: 420px) {
  h1 {
    font-size: 3rem;
  }
}

@media (min-width: 860px) {
  .page-list {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-card {
    grid-column: span 2;
  }

  .page-card:nth-child(4) {
    grid-column: 2 / span 2;
  }

  .page-card:nth-child(5) {
    grid-column: 4 / span 2;
  }
}

@media (max-width: 859px) {
  .page-list {
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  }
}