:root {
  --bg: #fafaf9;
  --surface: #ffffff;
  --text: #1c1917;
  --muted: #78716c;
  --border: #e7e5e4;
  --accent: #b91c1c;
  --green: #15803d;
  --red: #b91c1c;
  --orange: #b45309;
  --radius: 6px;
  --font: 'Helvetica Neue', 'Hiragino Sans', 'Yu Gothic', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  max-width: 100%;
  overflow-x: clip;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
  overflow-wrap: anywhere;
}

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }
img, picture, svg, video { max-width: 100%; height: auto; }

/* Layout */
.site-header {
  background: var(--text);
  color: white;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 52px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header .brand { font-size: 1.1rem; font-weight: 700; letter-spacing: 0.05em; white-space: nowrap; }
.site-header .tagline { font-size: 0.75rem; color: #a8a29e; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.site-nav { flex-shrink: 0; }
.site-nav a {
  font-size: 0.85rem;
  color: #d6d3d1;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  transition: background 0.15s;
  white-space: nowrap;
}
.site-nav a:hover { background: rgba(255,255,255,0.1); text-decoration: none; }

.container { max-width: 860px; margin: 0 auto; padding: 2rem 1.5rem; }

/* Report list */
.report-grid { display: flex; flex-direction: column; gap: 1rem; margin-top: 1.5rem; }

.report-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  transition: border-color 0.15s;
  min-width: 0;
}
.report-card:hover { border-color: var(--text); }
.report-card .date { font-size: 0.82rem; color: var(--muted); white-space: nowrap; }
.report-card .title { font-weight: 600; margin-bottom: 0.25rem; }
.report-card .meta { font-size: 0.82rem; color: var(--muted); }
.flag-count {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  background: #fef2f2;
  color: var(--red);
  border: 1px solid #fecaca;
  border-radius: 99px;
  padding: 0.15em 0.65em;
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
}

/* Report detail */
.report-header { margin-bottom: 2rem; padding-bottom: 1.5rem; border-bottom: 2px solid var(--text); }
.report-header h1 { font-size: 1.4rem; line-height: 1.4; }
.report-header .report-meta { font-size: 0.82rem; color: var(--muted); margin-top: 0.5rem; }

.report-body h2 {
  font-size: 1.1rem;
  margin: 2rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}
.report-body h3 { font-size: 0.95rem; margin: 1.5rem 0 0.5rem; color: var(--muted); }
.report-body p { margin-bottom: 0.75rem; }
.report-body ul, .report-body ol { padding-left: 1.5rem; margin-bottom: 0.75rem; }
.report-body li { margin-bottom: 0.3rem; }

/* Article images */
.report-body { overflow-wrap: anywhere; }
.report-body picture {
  display: block;
  max-width: 100%;
  margin: 1.5rem 0;
}
.report-body img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}

.report-body p:has(> img) {
  margin: 1.5rem 0;
}

/* Tables */
.report-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin: 1rem 0;
  overflow-x: auto;
  display: block;
}
.report-body th {
  background: var(--text);
  color: white;
  padding: 0.5rem 0.75rem;
  text-align: left;
  font-weight: 600;
}
.report-body td { padding: 0.45rem 0.75rem; border-bottom: 1px solid var(--border); }
.report-body tr:hover td { background: #f5f5f4; }

/* Flag section */
.flagged-section {
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}
.flagged-section h2 {
  border-bottom: 1px solid #fed7aa !important;
  color: var(--orange);
}

/* Gap badge */
.gap-badge {
  display: inline-block;
  padding: 0.1em 0.5em;
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 700;
}
.gap-badge.under { background: #dcfce7; color: var(--green); }
.gap-badge.over  { background: #fee2e2; color: var(--red); }

code { background: #f5f5f4; padding: 0.1em 0.4em; border-radius: 3px; font-size: 0.88em; }
pre { background: #1c1917; color: #e7e5e4; padding: 1rem; border-radius: var(--radius); overflow-x: auto; margin: 1rem 0; }
pre code { background: none; padding: 0; font-size: 0.85em; }

hr { border: none; border-top: 1px solid var(--border); margin: 1.5rem 0; }

.back-link { font-size: 0.85rem; color: var(--muted); display: inline-block; margin-bottom: 1.5rem; }
.back-link:hover { color: var(--text); }

footer { text-align: center; font-size: 0.78rem; color: var(--muted); padding: 2rem 0; border-top: 1px solid var(--border); margin-top: 3rem; }

@media (max-width: 640px) {
  .site-header {
    height: auto;
    min-height: 52px;
    padding: 0.65rem 1rem;
  }
  .site-header .brand { font-size: 1rem; }
  .site-header .tagline { display: none; }
  .site-nav a { font-size: 0.8rem; padding: 0.25rem 0; }
  .container { width: 100%; padding: 1.25rem 1rem; }
  .article-page { max-width: 100%; }
  .report-card {
    flex-direction: column;
    align-items: stretch;
  }
  .report-card > div:last-child {
    align-items: flex-start !important;
  }
}