:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --bg-accent: #edf3ff;
  --panel: rgba(255, 255, 255, 0.88);
  --panel-strong: #ffffff;
  --panel-muted: #f3f6fd;
  --text: #142033;
  --muted: #5a6780;
  --muted-strong: #3a4862;
  --border: rgba(129, 153, 197, 0.22);
  --border-strong: rgba(93, 120, 174, 0.24);
  --accent: #4965f4;
  --accent-strong: #334bd1;
  --accent-soft: rgba(73, 101, 244, 0.12);
  --accent-soft-strong: rgba(73, 101, 244, 0.18);
  --warning-soft: #fff5e7;
  --danger: #b42318;
  --shadow: 0 22px 60px rgba(20, 32, 51, 0.09);
  --shadow-soft: 0 14px 34px rgba(20, 32, 51, 0.06);
  font-family: Inter, "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(73, 101, 244, 0.12), transparent 32%),
    radial-gradient(circle at top right, rgba(74, 222, 128, 0.08), transparent 24%),
    linear-gradient(180deg, #f0f5ff 0%, var(--bg) 260px, #f7f9fc 100%);
  color: var(--text);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  transition:
    transform 140ms ease,
    opacity 140ms ease,
    background-color 140ms ease,
    border-color 140ms ease,
    box-shadow 140ms ease;
}

a:hover {
  opacity: 0.96;
}

h1,
h2,
h3,
p,
dl,
dt,
dd {
  margin: 0;
}

.container {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  padding: 28px 0 20px;
}

.hero--compact {
  padding-top: 22px;
}

.hero-card {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.9fr);
  gap: 22px;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 32px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(244, 247, 255, 0.92)),
    var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero__main,
.hero__aside,
.hero-surface {
  display: grid;
  gap: 16px;
}

.hero__main {
  align-content: start;
}

.eyebrow,
.panel__eyebrow {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.15rem, 2vw, 1.35rem);
  line-height: 1.28;
}

h3 {
  line-height: 1.35;
}

.lead {
  max-width: 52rem;
  color: var(--muted-strong);
  font-size: 1.02rem;
  line-height: 1.85;
}

.hero-links,
.hero-badge-list,
.page-nav,
.chip-list,
.helper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-link,
.hero-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 10px 24px rgba(73, 101, 244, 0.18);
}

.hero-link:hover,
.hero-badge:hover,
.article-card__link:hover {
  transform: translateY(-1px);
}

.hero-link--secondary,
.hero-badge {
  background: rgba(255, 255, 255, 0.7);
  color: var(--text);
  border-color: rgba(93, 120, 174, 0.2);
  box-shadow: none;
}

.hero-surface {
  align-content: start;
  min-height: 100%;
  padding: 22px;
  border-radius: 26px;
  border: 1px solid rgba(95, 120, 174, 0.16);
  background:
    linear-gradient(180deg, rgba(241, 245, 255, 0.92), rgba(255, 255, 255, 0.92));
}

.hero-surface .muted {
  max-width: none;
}

.back-link {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 8px;
  color: var(--muted-strong);
  text-decoration: none;
}

.back-link:hover {
  text-decoration: underline;
}

.layout {
  display: grid;
  gap: 24px;
  padding-bottom: 56px;
}

.section-grid {
  display: grid;
  gap: 24px;
}

.section-grid--home-top {
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
}

.section-grid--home-discovery,
.section-grid--detail-top,
.section-grid--detail-secondary {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.panel {
  position: relative;
  overflow: hidden;
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(14px);
}

.panel::before {
  content: '';
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, rgba(73, 101, 244, 0.18), transparent 42%);
}

.panel__heading {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 18px;
  margin-bottom: 18px;
}

.panel__heading > div {
  display: grid;
  gap: 8px;
}

.muted {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  padding: 18px;
  border-radius: 22px;
  border: 1px solid rgba(93, 120, 174, 0.16);
  background: linear-gradient(180deg, rgba(247, 249, 255, 0.96), rgba(255, 255, 255, 0.98));
}

.stat-card dt {
  color: var(--muted);
  font-size: 0.9rem;
}

.stat-card dd {
  margin-top: 10px;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 800;
  line-height: 1;
}

.search-form {
  display: grid;
  gap: 12px;
}

.search-form__label {
  color: var(--muted);
  font-size: 0.95rem;
}

.search-form__controls {
  display: flex;
  gap: 12px;
  align-items: center;
}

.search-form__input {
  width: 100%;
  min-height: 50px;
  padding: 0 18px;
  border: 1px solid rgba(95, 120, 174, 0.18);
  border-radius: 16px;
  background: #fff;
  color: var(--text);
  font: inherit;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.search-form__input:focus {
  outline: 2px solid rgba(73, 101, 244, 0.2);
  outline-offset: 2px;
  border-color: rgba(73, 101, 244, 0.36);
}

.search-form__button,
.article-card__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #fff;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 12px 28px rgba(73, 101, 244, 0.2);
}

.shelf-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.shelf-card {
  display: grid;
  gap: 16px;
  min-height: 100%;
  padding: 20px;
  border-radius: 24px;
  border: 1px solid rgba(93, 120, 174, 0.16);
  background: linear-gradient(180deg, rgba(248, 250, 255, 1), rgba(255, 255, 255, 1));
  box-shadow: 0 10px 22px rgba(20, 32, 51, 0.05);
}

.shelf-card:hover,
.article-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 34px rgba(20, 32, 51, 0.08);
}

.shelf-card__meta,
.shelf-card__footer,
.article-card__footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.shelf-card__body {
  display: grid;
  gap: 10px;
}

.shelf-card__body h3 {
  font-size: 1.12rem;
}

.chip,
.source-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  padding: 10px 14px;
  background: var(--accent-soft);
  color: var(--text);
  font-size: 0.94rem;
  line-height: 1.4;
  text-decoration: none;
  border: 1px solid transparent;
}

.chip:hover,
.source-pill:hover {
  background: rgba(73, 101, 244, 0.16);
}

.chip--selected,
.source-pill--selected {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #fff;
  border-color: transparent;
}

.chip--muted {
  padding: 8px 12px;
  background: var(--panel-muted);
  border: 1px solid rgba(93, 120, 174, 0.14);
  font-size: 0.82rem;
}

.chip__count,
.source-pill__count {
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(73, 101, 244, 0.12);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
}

.chip--selected .chip__count,
.source-pill--selected .source-pill__count {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
}

.source-pill {
  gap: 10px;
  background: var(--panel-muted);
  border-color: rgba(93, 120, 174, 0.14);
}

.source-pill__meta {
  color: var(--muted);
  font-size: 0.8rem;
}

.source-pill--selected .source-pill__meta {
  color: rgba(255, 255, 255, 0.86);
}

.status {
  padding: 15px 16px;
  border-radius: 18px;
  border: 1px solid rgba(93, 120, 174, 0.16);
  background: var(--panel-muted);
  color: var(--muted);
}

.status--error {
  border-color: rgba(180, 35, 24, 0.18);
  background: #fff1f0;
  color: var(--danger);
}

.status--warning {
  border-color: rgba(184, 104, 0, 0.18);
  background: var(--warning-soft);
  color: #8a4600;
}

.article-list {
  list-style: none;
  display: grid;
  gap: 18px;
  padding: 0;
  margin: 0;
}

.article-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding: 20px;
  border: 1px solid rgba(93, 120, 174, 0.16);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 1), rgba(248, 250, 255, 1));
  box-shadow: 0 10px 22px rgba(20, 32, 51, 0.05);
}

.article-card--with-image {
  grid-template-columns: minmax(0, 1fr) 200px;
}

.article-card__content {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.article-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 11px;
  border-radius: 999px;
  background: var(--panel-muted);
  color: var(--muted-strong);
  font-size: 0.82rem;
  border: 1px solid rgba(93, 120, 174, 0.12);
}

.meta-pill--category {
  background: rgba(73, 101, 244, 0.1);
  color: var(--accent-strong);
}

.article-card__title {
  font-size: clamp(1.12rem, 2vw, 1.35rem);
  line-height: 1.48;
}

.article-card__title a,
.article-card__title span {
  text-decoration: none;
}

.article-card__title a:hover {
  text-decoration: underline;
}

.article-card__summary {
  color: var(--muted-strong);
  line-height: 1.8;
}

.article-card__summary--missing {
  font-style: italic;
}

.article-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.article-card__link--disabled {
  background: var(--panel-muted);
  border: 1px solid rgba(93, 120, 174, 0.14);
  color: var(--muted);
  box-shadow: none;
  cursor: not-allowed;
}

.article-card__image {
  width: 200px;
  height: 148px;
  object-fit: cover;
  border-radius: 20px;
  border: 1px solid rgba(93, 120, 174, 0.16);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

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

.code-inline {
  padding: 2px 6px;
  border-radius: 8px;
  background: rgba(20, 32, 51, 0.08);
  font-family: "SFMono-Regular", ui-monospace, monospace;
  font-size: 0.92em;
}

@media (max-width: 980px) {
  .hero-card,
  .section-grid--home-top,
  .section-grid--home-discovery,
  .section-grid--detail-top,
  .section-grid--detail-secondary {
    grid-template-columns: 1fr;
  }

  .hero__aside {
    order: -1;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(100%, calc(100% - 24px));
  }

  .hero {
    padding: 20px 0 16px;
  }

  .hero-card,
  .panel,
  .article-card,
  .shelf-card {
    padding: 20px;
    border-radius: 24px;
  }

  .panel__heading,
  .search-form__controls,
  .article-card__footer,
  .shelf-card__footer {
    flex-direction: column;
    align-items: stretch;
  }

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

  .article-card--with-image {
    grid-template-columns: 1fr;
  }

  .article-card__image {
    width: 100%;
    height: 220px;
  }

  .hero-link,
  .hero-badge,
  .search-form__button,
  .article-card__link {
    width: 100%;
  }
}