:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --accent-green: #10b981;
  --accent-gold: #f59e0b;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 6px 18px rgba(0,0,0,0.07);
  --shadow-lg: 0 12px 28px rgba(0,0,0,0.1);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { background-color: var(--bg-page); color: var(--text-main); font-family: var(--font-family); line-height: 1.6; }
.portal-wrapper { max-width: 1080px; margin: 0 auto; padding: 0 16px 40px; }

/* ヘッダー */
.portal-header { padding: 24px 0; border-bottom: 1px solid var(--border); margin-bottom: 30px; }
.header-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo-icon { font-size: 2rem; color: var(--primary); }
.logo-title { font-size: 1.3rem; font-weight: 800; color: var(--text-main); display: block; }
.logo-domain { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); display: block; }
.header-badge { font-size: 0.8rem; font-weight: 700; color: var(--accent-green); background: #ecfdf5; border: 1px solid #a7f3d0; padding: 4px 10px; border-radius: 6px; }

/* ヒーロー */
.portal-hero { text-align: center; padding: 30px 10px 40px; }
.portal-hero h1 { font-size: 2.2rem; font-weight: 800; color: #0f172a; letter-spacing: -0.5px; line-height: 1.3; margin-bottom: 14px; }
.hero-sub { font-size: 1.05rem; color: var(--text-muted); max-width: 720px; margin: 0 auto; line-height: 1.7; }

/* セクション */
.section-title { font-size: 1.4rem; font-weight: 800; color: var(--text-main); margin-bottom: 24px; display: flex; align-items: center; gap: 10px; }

/* ツールカードグリッド */
.tools-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(310px, 1fr)); gap: 24px; margin-bottom: 48px; }

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  position: relative;
}
.tool-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.tool-card.popular { border-color: #86efac; box-shadow: 0 4px 20px rgba(16, 185, 129, 0.12); }

.tool-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.tool-tag { font-size: 0.75rem; font-weight: 800; padding: 3px 8px; border-radius: 4px; }
.tag-popular { background: #d1fae5; color: #047857; }
.tag-hot { background: #fee2e2; color: #b91c1c; }
.tag-soon { background: #f1f5f9; color: #64748b; }
.tool-cat { font-size: 0.75rem; font-weight: 600; color: var(--text-muted); }

.tool-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 16px;
}
.icon-fukugyo { background: #ecfdf5; color: var(--accent-green); }
.icon-loan { background: #eff6ff; color: var(--primary); }
.icon-ikukyu { background: #fdf4ff; color: #c026d3; }

.tool-card h3 { font-size: 1.15rem; font-weight: 800; color: var(--text-main); margin-bottom: 10px; line-height: 1.4; }
.tool-desc { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 16px; }

.tool-features { list-style: none; font-size: 0.8rem; color: #334155; display: flex; flex-direction: column; gap: 6px; margin-bottom: 24px; }
.tool-features i { color: var(--accent-green); margin-right: 6px; }

.tool-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  background-color: var(--accent-green);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
}
.tool-btn:hover { background-color: #059669; }
.tool-btn.btn-blue { background-color: var(--primary); box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25); }
.tool-btn.btn-blue:hover { background-color: var(--primary-hover); }
.tool-btn.btn-disabled { background-color: #e2e8f0; color: #94a3b8; cursor: not-allowed; box-shadow: none; }

/* サイト特徴 */
.portal-features { background: var(--bg-card); border-radius: var(--radius-lg); border: 1px solid var(--border); padding: 36px 28px; margin-bottom: 48px; }
.portal-features h2 { font-size: 1.3rem; font-weight: 800; text-align: center; margin-bottom: 30px; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.feature-box { text-align: center; padding: 10px; }
.feat-icon { font-size: 2rem; color: var(--primary); margin-bottom: 12px; }
.feature-box h4 { font-size: 1.05rem; font-weight: 800; margin-bottom: 8px; }
.feature-box p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }

/* フッター */
.portal-footer { text-align: center; padding-top: 20px; border-top: 1px solid var(--border); font-size: 0.85rem; color: var(--text-muted); }
.footer-links { display: flex; justify-content: center; gap: 20px; margin-bottom: 12px; }
.footer-links a { color: var(--primary); text-decoration: none; font-weight: 600; }
.footer-links a:hover { text-decoration: underline; }
.disclaimer { font-size: 0.75rem; color: #94a3b8; margin-top: 6px; }

@media (max-width: 640px) {
  .portal-hero h1 { font-size: 1.6rem; }
  .tools-grid { grid-template-columns: 1fr; }
}