/* ===== TEIKeM site styles =====
   Bootstrap 5 の上に載せる最小限のカスタム層。
   配色は藍色（構造化テキストの落ち着き）＋markupモチーフの等幅書体。 */

:root {
  --teikem-navy: #1e3a5f;
  --teikem-navy-dark: #14293f;
  --teikem-accent: #c4652f;
  --teikem-code: #8fb8de;
}

body {
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: #212529;
}

/* --- navbar --- */
.site-navbar {
  background-color: var(--teikem-navy-dark);
}
.navbar-brand {
  font-family: "Source Code Pro", monospace;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.tag-mark {
  color: var(--teikem-code);
}

/* --- hero / page header --- */
.hero {
  background: linear-gradient(160deg, var(--teikem-navy) 0%, var(--teikem-navy-dark) 100%);
}
.page-header {
  background-color: var(--teikem-navy);
}
.hero-code,
.footer-code,
.card-code {
  font-family: "Source Code Pro", monospace;
  font-size: 0.9rem;
}
.hero-code {
  color: var(--teikem-code);
}
.hero-lead {
  color: rgba(255, 255, 255, 0.85);
}

/* --- sections --- */
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  border-left: 6px solid var(--teikem-navy);
  padding-left: 0.75rem;
  margin-bottom: 1.5rem;
}

/* --- content cards --- */
.content-card {
  border: 1px solid #dee2e6;
  border-top: 4px solid var(--teikem-navy);
  transition: box-shadow 0.15s ease;
}
.content-card:hover {
  box-shadow: 0 0.25rem 0.75rem rgba(20, 41, 63, 0.15);
}
.card-code {
  color: #6c757d;
}
.content-card a {
  color: var(--teikem-navy);
  font-weight: 500;
  text-decoration: none;
}

/* --- news --- */
.news-list .news-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem 0;
  border-bottom: 1px solid #dee2e6;
}
.news-date {
  flex-shrink: 0;
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  background-color: var(--teikem-accent);
  border-radius: 0.25rem;
  padding: 0.15rem 0.6rem;
  margin-top: 0.15rem;
}

/* --- placeholder --- */
.placeholder-box {
  border: 1px dashed #adb5bd;
  border-radius: 0.375rem;
  background-color: #f8f9fa;
  padding: 2rem;
  text-align: center;
  color: #6c757d;
}

/* --- footer --- */
.site-footer {
  background-color: var(--teikem-navy-dark);
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
}
.footer-code {
  color: var(--teikem-code);
}

/* --- accessibility --- */
a:focus-visible,
.btn:focus-visible {
  outline: 3px solid var(--teikem-accent);
  outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  .content-card {
    transition: none;
  }
}