:root {
  color-scheme: light;
  --page-bg: #f6f7fb;
  --page-text-color: #0f172a;
  --page-card-bg: #ffffff;
  --card-border: rgba(15, 23, 42, 0.12);
}

html {
  color-scheme: light;
  background: var(--page-bg);
  color: var(--page-text-color);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page-bg: #04050d;
    --page-text-color: #e0e7ff;
    --page-card-bg: rgba(15, 23, 42, 0.92);
    --card-border: rgba(255, 255, 255, 0.2);
  }

  html {
    color-scheme: dark;
    background: var(--page-bg);
    color: var(--page-text-color);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--page-bg);
  color: var(--page-text-color);
  font-family: "Inter", "Avenir Next", "Segoe UI", "Hiragino Kaku Gothic ProN", "Noto Sans JP",
    sans-serif;
}

main.page {
  width: 100%;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 3rem 1rem 4rem;
  align-items: flex-start;
}

article.card {
  width: min(760px, 100%);
  margin: 0 auto;
  border-radius: 1.5rem;
  padding: 2rem;
  border: 1px solid var(--card-border);
  background: var(--page-card-bg);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
}

header.header {
  padding: 1.4rem 1.2rem;
  margin-bottom: 1rem;
}

h1.title {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--page-text-color);
}

ul.list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

a.link {
  display: block;
  width: 100%;
  color: inherit;
  text-decoration: none;
  cursor: inherit;
}

li.item {
  list-style: none;
  margin: 0;
  border-radius: 1.25rem;
  border: 1px solid var(--card-border);
  background: var(--page-card-bg);
  padding: 1rem;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease,
    background 0.18s ease;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.09);
  cursor: default;
}

li.item:hover {
  transform: translateY(-2px);
  background: color-mix(in srgb, var(--page-card-bg) 95%, var(--page-text-color) 5%);
  border-color: color-mix(in srgb, var(--card-border) 75%, var(--page-text-color) 15%);
  box-shadow: 0 30px 55px rgba(15, 23, 42, 0.2);
  cursor: pointer;
}

.item-inner {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.icon-wrap {
  width: clamp(2.2rem, 4vw, 3rem);
  height: clamp(2.2rem, 4vw, 3rem);
  min-width: clamp(2.2rem, 4vw, 3rem);
  overflow: hidden;
}

.icon-wrap img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: transparent;
}

.title-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.title-line {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-weight: 600;
}

.desc {
  color: var(--page-text-color);
  opacity: 0.75;
  font-size: 0.9rem;
  line-height: 1.4;
  margin: 0;
}

.badge {
  font-size: 0.75rem;
  color: var(--page-text-color);
  opacity: 0.8;
}