@import url("https://fonts.googleapis.com/css2?family=Unbounded:wght@500;700;900&display=swap");

:root {
  color-scheme: light dark;
  --bg: #f7f4ed;
  --surface: #fffdf8;
  --surface-strong: #ece9e1;
  --text: #080808;
  --muted: rgba(8, 8, 8, 0.58);
  --line: rgba(8, 8, 8, 0.14);
  --shadow: rgba(8, 8, 8, 0.08);
  --max: 900px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #080808;
    --surface: #111111;
    --surface-strong: #1a1a1a;
    --text: #f7f4ed;
    --muted: rgba(247, 244, 237, 0.62);
    --line: rgba(247, 244, 237, 0.16);
    --shadow: rgba(0, 0, 0, 0.28);
  }
}

:root[data-theme="dark"] {
  --bg: #080808;
  --surface: #111111;
  --surface-strong: #1a1a1a;
  --text: #f7f4ed;
  --muted: rgba(247, 244, 237, 0.62);
  --line: rgba(247, 244, 237, 0.16);
  --shadow: rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }

html {
  background: var(--bg);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: radial-gradient(circle at 85% 0%, var(--shadow), transparent 30rem), var(--bg);
  color: var(--text);
  font: 16px/1.75 "Unbounded", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

a {
  color: var(--text);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.shell {
  width: min(var(--max), calc(100% - 40px));
  margin: auto;
  padding: 28px 0 72px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand {
  color: var(--text);
  font: 900 clamp(22px, 6vw, 38px)/1 "Unbounded", sans-serif;
  letter-spacing: -0.08em;
  text-decoration: none;
}

.language {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  min-width: 126px;
  padding: 9px 14px;
  font: inherit;
  font-size: 13px;
  text-align: center;
  text-align-last: center;
  cursor: pointer;
}

.language option { text-align: left; }

.theme-toggle {
  appearance: none;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  padding: 0;
  cursor: pointer;
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.theme-toggle:hover,
.language:hover {
  background: var(--surface-strong);
}

.hero { padding: 68px 0 42px; }

.eyebrow {
  margin: 0 0 14px;
  color: var(--muted);
  font: 500 11px/1.4 "Unbounded", sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2 {
  font-family: "Unbounded", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  letter-spacing: -0.06em;
  line-height: 1.15;
}

h1 {
  max-width: 720px;
  margin: 0;
  color: var(--text);
  font-size: clamp(28px, 7vw, 48px);
  font-weight: 900;
}

h2 {
  margin: 44px 0 12px;
  color: var(--text);
  font-size: clamp(18px, 4vw, 25px);
  font-weight: 700;
}

.lead {
  max-width: 700px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.date {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
}

.nav a {
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  font-size: 13px;
  text-decoration: none;
}

.nav a[aria-current="page"] {
  border-color: var(--text);
  background: var(--text);
  color: var(--bg);
}

.notice {
  margin: 10px 0 32px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface-strong);
  color: var(--text);
}

.content { max-width: 760px; }

.content p,
.content li { color: var(--text); }

.content ul { padding-left: 22px; }

.content li + li { margin-top: 7px; }

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 8px 0 42px;
}

.summary-card {
  display: block;
  min-height: 124px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: 0 8px 24px var(--shadow);
  text-decoration: none;
}

.summary-card b {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 14px;
}

.summary-card span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 58px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 640px) {
  .shell {
    width: min(var(--max), calc(100% - 28px));
    padding-top: 18px;
  }

  .hero { padding: 52px 0 30px; }

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

  .summary-card { min-height: auto; }

  footer { display: block; }

  footer span {
    display: block;
    margin-top: 8px;
  }
}