@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";
:root{--bg:#f8f9fb;--bg-card:#fff;--text:#1a1a2e;--text-muted:#64748b;--primary:#2563eb;--primary-hover:#1d4ed8;--accent:#7c3aed;--accent-hover:#6d28d9;--border:#e2e8f0;--success:#059669;--danger:#dc2626;--radius:12px;--shadow:0 1px 3px #00000014, 0 1px 2px #0000000f;--shadow-lg:0 10px 25px #00000014}[data-theme=dark]{--bg:#0f172a;--bg-card:#1e293b;--text:#f1f5f9;--text-muted:#94a3b8;--primary:#3b82f6;--primary-hover:#60a5fa;--accent:#8b5cf6;--accent-hover:#a78bfa;--border:#334155;--success:#10b981;--danger:#ef4444;--shadow:0 1px 3px #0000004d;--shadow-lg:0 10px 25px #0000004d}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6;transition:background .3s,color .3s}a{color:var(--primary);text-decoration:none;transition:color .2s}a:hover{color:var(--primary-hover)}h1,h2,h3,h4{color:var(--text);font-weight:700;line-height:1.3}.container{max-width:1100px;margin:0 auto;padding:0 20px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px;transition:box-shadow .3s,transform .2s}.card:hover{box-shadow:var(--shadow-lg)}.card-link{color:inherit;text-decoration:none;display:block}.card-link:hover{color:inherit;transform:translateY(-2px)}.btn{cursor:pointer;border:none;border-radius:8px;align-items:center;gap:8px;padding:10px 20px;font-family:inherit;font-size:.95rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover);transform:translateY(-1px)}.btn-accent{background:var(--accent);color:#fff}.btn-accent:hover{background:var(--accent-hover)}.btn-outline{color:var(--text);border:1px solid var(--border);background:0 0}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}.input{border:1px solid var(--border);background:var(--bg);width:100%;color:var(--text);border-radius:8px;padding:12px 16px;font-family:inherit;font-size:1rem;transition:border-color .2s,box-shadow .2s}.input:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px #2563eb26}textarea.input{resize:vertical}select.input{cursor:pointer}.label{color:var(--text-muted);margin-bottom:6px;font-size:.9rem;font-weight:500;display:block}.result-box{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);text-align:center;padding:24px}.result-value{font-size:2.5rem;font-weight:800}.result-label{color:var(--text-muted);margin-bottom:4px;font-size:.9rem}.grid-2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;display:grid}.grid-3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;display:grid}.grid-4{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;display:grid}.tabs{flex-wrap:wrap;gap:8px;margin-bottom:24px;display:flex}.tab{cursor:pointer;border:1px solid var(--border);color:var(--text-muted);background:0 0;border-radius:8px;padding:8px 18px;font-family:inherit;font-weight:500;transition:all .2s}.tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}.navbar{background:var(--bg-card);border-bottom:1px solid var(--border);z-index:100;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:16px 0;position:sticky;top:0}.navbar-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;display:flex}.navbar-logo{color:var(--text);align-items:center;gap:8px;font-size:1.4rem;font-weight:800;display:flex}.navbar-logo span{color:var(--primary)}.navbar-links{flex-wrap:wrap;align-items:center;gap:24px;display:flex}.navbar-links a{color:var(--text-muted);font-size:.95rem;font-weight:500}.navbar-links a:hover{color:var(--primary)}.theme-toggle{border:1px solid var(--border);cursor:pointer;color:var(--text);background:0 0;border-radius:8px;padding:6px 10px;font-size:1.1rem;transition:all .2s}.theme-toggle:hover{border-color:var(--primary)}.footer{border-top:1px solid var(--border);text-align:center;color:var(--text-muted);margin-top:60px;padding:32px 0}.hero{text-align:center;padding:60px 0 40px}.hero h1{margin-bottom:16px;font-size:2.8rem}.hero p{color:var(--text-muted);max-width:600px;margin:0 auto;font-size:1.2rem}.hero-gradient{background:linear-gradient(135deg, var(--primary), var(--accent));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.page-header{margin-bottom:32px}.page-header h1{margin-bottom:8px;font-size:2rem}.page-header p{color:var(--text-muted);font-size:1.05rem}.copy-btn{background:var(--bg);border:1px solid var(--border);cursor:pointer;color:var(--text-muted);border-radius:6px;padding:6px 12px;font-family:inherit;font-size:.85rem;transition:all .2s}.copy-btn:hover{border-color:var(--primary);color:var(--primary)}@media (max-width:768px){.hero h1{font-size:2rem}.hero p{font-size:1rem}.card{padding:20px}.result-value{font-size:2rem}.navbar-links{gap:12px}}@media (max-width:480px){.hero h1{font-size:1.6rem}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.navbar-inner{flex-direction:column;align-items:flex-start}}