:root {
  color-scheme: light;
  --bg: #f5f7f6;
  --surface: #ffffff;
  --text: #18201d;
  --muted: #5c6863;
  --line: #d8e0dc;
  --accent: #087b63;
  --accent-soft: #e6f4ef;
  --warning: #8a5a00;
  --warning-bg: #fff8e8;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100%;
  margin: 0;
}

a {
  color: inherit;
}

.shell {
  width: min(100% - 32px, 760px);
  margin: 0 auto;
}

.preview-header {
  border-bottom: 1px solid var(--line);
  background: #0a4b3d;
  color: #ffffff;
  padding: 28px 0 24px;
}

.compact-header {
  padding: 18px 0;
}

.kicker {
  margin: 0 0 6px;
  color: #bcebdc;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.preview-header h1 {
  margin: 0;
  font-size: clamp(1.7rem, 8vw, 2.5rem);
  line-height: 1.18;
}

.header-note {
  margin: 10px 0 0;
  color: #e0f2ec;
}

.back-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  margin-bottom: 10px;
  font-weight: 800;
  text-decoration: none;
}

.build-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin: 14px 0 0;
  color: #c9e6dc;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.76rem;
  overflow-wrap: anywhere;
}

.page-main,
.article-main {
  padding: 28px 0 64px;
}

.page-main h2 {
  margin: 0 0 14px;
  font-size: 1.35rem;
}

.article-list {
  display: grid;
  gap: 12px;
}

.article-card {
  display: grid;
  gap: 8px;
  min-height: 120px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  padding: 18px;
  text-decoration: none;
}

.article-card:focus-visible,
.article-card:hover {
  border-color: var(--accent);
  outline: 3px solid var(--accent-soft);
}

.article-card strong {
  font-size: 1.12rem;
  line-height: 1.4;
}

.article-card span:last-child,
.article-card-meta,
.empty-state {
  color: var(--muted);
}

.article-card-meta {
  font-size: 0.82rem;
  font-weight: 800;
}

.article-heading h1 {
  margin: 10px 0 0;
  font-size: clamp(2rem, 9vw, 3rem);
  line-height: 1.24;
  overflow-wrap: anywhere;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 800;
}

.status-badge {
  border-radius: 999px;
  background: var(--accent-soft);
  color: #075d4b;
  padding: 4px 9px;
}

.summary,
.lead {
  border-left: 4px solid var(--accent);
  background: var(--surface);
  margin: 20px 0 0;
  padding: 15px 16px;
}

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

.image-note {
  margin: 22px 0;
  border: 1px solid #e7c46f;
  border-radius: 10px;
  background: var(--warning-bg);
  color: var(--warning);
  padding: 12px 14px;
  font-size: 0.9rem;
  font-weight: 700;
}

.article-panel {
  margin-top: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  padding: clamp(18px, 5vw, 34px);
}

.headline {
  margin: 0;
  font-size: clamp(1.45rem, 6vw, 2rem);
  line-height: 1.38;
  overflow-wrap: anywhere;
}

.article-body {
  margin-top: 30px;
  font-size: 1.05rem;
  line-height: 1.85;
  overflow-wrap: anywhere;
}

.article-body h2,
.article-body h3 {
  margin: 2.1em 0 0.75em;
  line-height: 1.45;
}

.article-body h2 {
  border-bottom: 2px solid var(--accent-soft);
  padding-bottom: 0.4em;
  font-size: 1.35rem;
}

.article-body h3 {
  font-size: 1.15rem;
}

.article-body p,
.article-body ul,
.article-body ol {
  margin: 0 0 1.25em;
}

.article-body ul,
.article-body ol {
  padding-left: 1.35rem;
}

.article-body li {
  margin: 0.35em 0;
  padding-left: 0.15rem;
}

.article-body hr {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: 2.25em 0;
}

.article-build-meta {
  color: var(--muted);
  margin-top: 20px;
}

@media (max-width: 430px) {
  .shell {
    width: min(100% - 24px, 760px);
  }

  .preview-header {
    padding-top: 20px;
  }

  .compact-header {
    padding-top: 12px;
  }

  .page-main,
  .article-main {
    padding-top: 22px;
  }

  .article-panel {
    border-right: 0;
    border-left: 0;
    border-radius: 0;
    margin-right: -12px;
    margin-left: -12px;
  }
}