:root {
  --brand: #0b6e4f;
  --brand-dark: #095a40;
  --bg: #f7f8fa;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --danger: #c0392b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", Meiryo, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header / footer */
.site-header, .admin-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.admin-header { background: #11241d; border-bottom: none; }
.admin-header .brand, .admin-header .nav a { color: #fff; }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 20px;
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.nav { display: flex; gap: 16px; flex-wrap: wrap; }
.nav a { color: var(--muted); font-size: .95rem; }

.site-footer {
  margin-top: 60px;
  padding: 30px 0;
  background: #11241d;
  color: #cbd5d0;
  font-size: .9rem;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  color: #fff;
  padding: 56px 28px;
  border-radius: 16px;
  margin: 28px 0;
  text-align: center;
}
.hero h1 { margin: 0 0 8px; font-size: 2rem; }
.lead { color: var(--muted); font-size: 1.05rem; }
.hero .lead { color: #e6f3ee; }

/* Sections */
section { margin: 40px 0; }
h2 { border-left: 5px solid var(--brand); padding-left: 12px; }

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  color: var(--text);
  transition: transform .12s ease, box-shadow .12s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(0,0,0,.06); text-decoration: none; }
.card h3 { margin: 6px 0 8px; }
.card p { color: var(--muted); margin: 0; font-size: .92rem; }
.count { display: inline-block; margin-top: 12px; color: var(--brand); font-weight: 600; font-size: .85rem; }
.tag {
  display: inline-block;
  background: #e7f3ee;
  color: var(--brand-dark);
  font-size: .75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
}

/* Breadcrumb */
.breadcrumb { font-size: .85rem; color: var(--muted); margin: 20px 0 0; }

/* Article */
.article { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 32px; margin-top: 16px; }
.article h1 { margin: 12px 0; }
.article .meta { color: var(--muted); font-size: .85rem; }
.article-body { margin-top: 24px; }
.article-body h2 { border: none; padding: 0; margin-top: 28px; }
.article-body img { max-width: 100%; height: auto; border-radius: 8px; }
.article-body blockquote {
  border-left: 4px solid var(--brand);
  margin: 16px 0;
  padding: 4px 16px;
  background: #f0f6f3;
  color: #374151;
}
.article-body code { background: #f1f1f1; padding: 2px 6px; border-radius: 4px; }
.article-body pre { background: #1f2937; color: #f7f8fa; padding: 16px; border-radius: 8px; overflow-x: auto; }
.article-body pre code { background: none; color: inherit; }
.article-body table { border-collapse: collapse; width: 100%; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 8px 12px; }

/* Flash */
.flash { padding: 12px 16px; border-radius: 8px; margin: 16px 0; }
.flash-error { background: #fdecea; color: var(--danger); }
.flash-success { background: #e7f6ee; color: var(--brand-dark); }
.flash-message { background: #eef2ff; color: #3730a3; }

/* Buttons */
.btn {
  display: inline-block;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  padding: 9px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: .9rem;
}
.btn:hover { text-decoration: none; background: #f3f4f6; }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-small { padding: 5px 10px; font-size: .82rem; }
.btn-danger { color: var(--danger); border-color: #f1c0bb; }
.btn-danger:hover { background: #fdecea; }

/* Admin */
.admin-body { background: #eef1f4; }
.admin-page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.admin-table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 12px; overflow: hidden; }
.admin-table th, .admin-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border); }
.admin-table th { background: #f3f4f6; font-size: .85rem; color: var(--muted); }
.row-actions { display: flex; gap: 8px; align-items: center; }
.row-actions form { margin: 0; }
.badge { font-size: .75rem; padding: 3px 9px; border-radius: 999px; }
.badge-on { background: #e7f6ee; color: var(--brand-dark); }
.badge-off { background: #f3f4f6; color: var(--muted); }

/* Forms */
.article-form { display: flex; flex-direction: column; gap: 16px; max-width: 720px; margin-top: 20px; }
.article-form label { display: flex; flex-direction: column; gap: 6px; font-size: .9rem; font-weight: 600; }
.article-form input, .article-form select, .article-form textarea {
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-weight: 400;
}
.article-form textarea.code { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: .9rem; }
.checkbox { flex-direction: row !important; align-items: center; gap: 8px; }
.checkbox input { width: auto; }
.req { color: var(--danger); }
.form-section { margin-top: 40px; }

/* Login */
.admin-login-body { display: flex; min-height: 100vh; align-items: center; justify-content: center; background: #11241d; }
.login-card { background: #fff; padding: 36px; border-radius: 14px; width: 340px; max-width: 90%; }
.login-card h1 { font-size: 1.2rem; margin-top: 0; }
.login-card form { display: flex; flex-direction: column; gap: 14px; }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: .9rem; }
.login-card input { font: inherit; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; }