:root{--bg: #0f1115;--bg-elev: #171a21;--bg-elev2: #1e2230;--border: #2a2f3d;--text: #e8eaf0;--text-dim: #9aa2b5;--accent: #ffd54a;--accent-dim: #b89a2e;--danger: #ff6b6b;--ok: #5fd38a;--radius: 12px;font-size:16px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic UI,Meiryo,sans-serif;line-height:1.7}a{color:inherit}.container{max-width:960px;margin:0 auto;padding:0 20px}.site-header{display:flex;align-items:baseline;gap:16px;padding:18px 24px;border-bottom:1px solid var(--border)}.brand{font-weight:800;font-size:1.25rem;text-decoration:none;letter-spacing:.02em}.brand span{color:var(--accent)}.tagline{margin:0;color:var(--text-dim);font-size:.85rem}.hero{padding:56px 0 32px;text-align:center}.hero h1{font-size:2rem;margin:0 0 16px;line-height:1.4}.hero p{color:var(--text-dim);max-width:560px;margin:0 auto}.category-head{font-size:1rem;color:var(--text-dim);border-bottom:1px solid var(--border);padding-bottom:8px;margin:32px 0 0;letter-spacing:.08em}.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;padding:20px 0 28px}.tool-card{display:block;background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:24px;text-decoration:none;transition:transform .15s ease,border-color .15s ease}.tool-card:hover{transform:translateY(-2px);border-color:var(--accent-dim)}.tool-card h2,.tool-card h3{font-size:1.15rem;margin:12px 0 8px}.tool-card p{color:var(--text-dim);font-size:.9rem;margin:0 0 12px}.tool-card.coming-soon{opacity:.45;pointer-events:none}.tool-icon{font-size:1.8rem}.tool-tags{color:var(--accent);font-size:.78rem}.ad-slot{display:flex;align-items:center;justify-content:center;min-height:90px;margin:8px auto;max-width:728px;border:1px dashed var(--border);border-radius:var(--radius);color:var(--border);font-size:.75rem;letter-spacing:.3em}.site-footer{border-top:1px solid var(--border);padding:24px;text-align:center;color:var(--text-dim);font-size:.8rem}.footer-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 20px;margin-bottom:12px}.footer-nav a{color:var(--text-dim);text-decoration:none}.footer-nav a:hover{color:var(--accent);text-decoration:underline}