/* Kumofuton pages: the app's dusk sky and soft cloud cards. */
:root {
  --sky-top: #f4e2f2;
  --sky-bottom: #ffe2d8;
  --text: #2a2646;
  --muted: #585274;
  --card: rgba(255, 255, 255, 0.72);
  --card-border: rgba(255, 255, 255, 0.6);
  --shadow: 0 16px 40px rgba(181, 88, 138, 0.18);
  --primary: #6a58b5;
  --on-primary: #ffffff;
  --secondary: rgba(255, 255, 255, 0.55);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --sky-top: #121129;
    --sky-bottom: #2b2040;
    --text: #eeeaf8;
    --muted: #c0bada;
    --card: rgba(255, 255, 255, 0.09);
    --card-border: rgba(255, 255, 255, 0.08);
    --shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
    --primary: #f2d38a;
    --on-primary: #211c38;
    --secondary: rgba(255, 255, 255, 0.08);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: linear-gradient(var(--sky-top), var(--sky-bottom)) fixed;
  font-family: ui-rounded, "Hiragino Maru Gothic ProN", "Hiragino Sans", "Apple SD Gothic Neo",
    "PingFang SC", "PingFang TC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

.top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 760px;
  margin: 0 auto;
  padding: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
}

.brand img { border-radius: 10px; }

.pages { display: flex; flex-wrap: wrap; gap: 6px; }

.pages a, .languages a {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--secondary);
  color: var(--text);
  text-decoration: none;
  font-size: 0.92rem;
}

main { max-width: 760px; margin: 0 auto; padding: 8px 20px 40px; }

h1 { font-size: 1.8rem; line-height: 1.4; margin: 12px 0 8px; }
h2 { font-size: 1.15rem; margin: 1.6em 0 0.4em; }
.card h2:first-child { margin-top: 0; }

.hero { text-align: center; padding: 24px 0 12px; }
.hero img { border-radius: 28px; box-shadow: var(--shadow); }
.tagline { color: var(--muted); font-size: 1.1rem; }

.card {
  margin: 20px 0;
  padding: 24px 28px;
  border-radius: 32px;
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.features { padding-inline-start: 1.2em; }
.features li { margin: 4px 0; }

.meta { color: var(--muted); }

.links { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin: 28px 0; }

.button {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 999px;
  background: var(--primary);
  color: var(--on-primary);
  font-weight: 700;
  text-decoration: none;
}

.button.secondary { background: var(--secondary); color: var(--text); }

details { padding: 12px 0; border-bottom: 1px solid var(--card-border); }
details:last-child { border-bottom: none; }
summary { cursor: pointer; font-weight: 700; }
details p { margin: 8px 0 0; color: var(--text); }

.todo { color: #c0392b; font-weight: 700; }

footer { max-width: 760px; margin: 0 auto; padding: 0 20px 40px; color: var(--muted); font-size: 0.9rem; }
.languages { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.languages a[aria-current="page"] { background: var(--primary); color: var(--on-primary); }

.language-list { list-style: none; padding: 0; }
.language-list a { display: inline-block; padding: 8px 0; }