:root{--primary-blue:#06f;--primary-dark:#0052cc;--primary-light:#3385ff;--accent-blue:#e6f0ff;--text-primary:#0a0f1c;--text-secondary:#64748b;--text-muted:#94a3b8;--bg-primary:#fff;--bg-secondary:#f8fafc;--bg-tertiary:#f1f5f9;--border-light:#e2e8f0;--border-default:#cbd5e1;--shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,.1);--shadow-lg:0 10px 25px rgba(0,0,0,.08);--shadow-xl:0 20px 40px rgba(0,0,0,.1);--radius-sm:6px;--radius-md:10px;--radius-lg:16px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans JP,sans-serif;background:var(--bg-secondary);min-height:100vh;color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.container{max-width:1200px;margin:0 auto;padding:0 20px}.navbar{background:hsla(0,0%,100%,.8);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border-light);position:sticky;top:0;z-index:1000;transition:all .3s ease}.navbar .container{display:flex;justify-content:space-between;align-items:center;padding:1.25rem 20px}.nav-brand h1{font-size:1.375rem;font-weight:700;color:var(--text-primary);letter-spacing:-.02em;display:flex;align-items:center;gap:.5rem}.nav-brand h1:before{content:"";width:32px;height:32px;background:linear-gradient(135deg,var(--primary-blue),var(--primary-light));border-radius:var(--radius-sm);display:inline-block;position:relative;animation:logoFloat 3s ease-in-out infinite}@keyframes logoFloat{0%,to{transform:translateY(0)}50%{transform:translateY(-3px)}}.nav-menu{list-style:none;display:flex;gap:1rem}.nav-menu a{text-decoration:none;color:var(--text-secondary);font-weight:500;font-size:.925rem;padding:.5rem 1rem;border-radius:var(--radius-sm);transition:all .2s;position:relative}.nav-menu a:hover{color:var(--primary-blue);background:var(--accent-blue)}.hero{background:var(--bg-primary);padding:5rem 0 4rem;text-align:center;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at center,var(--accent-blue) 0,transparent 70%);opacity:.5;animation:pulse 20s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1);opacity:.3}50%{transform:scale(1.1);opacity:.5}}.hero-title{font-size:3.5rem;font-weight:800;margin-bottom:1.25rem;letter-spacing:-.03em;line-height:1.1;color:var(--text-primary);position:relative;z-index:1;animation:fadeInUp .8s ease-out}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.hero-title span{background:linear-gradient(135deg,var(--primary-blue),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:1.25rem;color:var(--text-secondary);margin-bottom:3rem;font-weight:400}.hero-subtitle,.search-box{position:relative;z-index:1}.search-box{max-width:600px;margin:0 auto}.search-box input{width:100%;padding:1.25rem 1.5rem;font-size:1rem;border:2px solid var(--border-light);border-radius:var(--radius-lg);background:var(--bg-primary);transition:all .3s;box-shadow:var(--shadow-md)}.search-box input:focus{outline:none;border-color:var(--primary-blue);box-shadow:0 0 0 4px rgba(0,102,255,.1),var(--shadow-lg)}.tools-grid{padding:4rem 0}.filter-container{margin-bottom:3rem;text-align:center}.filter-label{font-size:.875rem;color:var(--text-muted);margin-bottom:1rem;display:block;text-transform:uppercase;letter-spacing:.05em}.filter-tags{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap}.filter-tag{padding:.625rem 1.25rem;border:1px solid var(--border-light);background:var(--bg-primary);border-radius:var(--radius-lg);font-size:.875rem;font-weight:500;color:var(--text-secondary);cursor:pointer;transition:all .2s}.filter-tag:hover{border-color:var(--primary-blue);color:var(--primary-blue);background:var(--accent-blue);transform:translateY(-2px)}.filter-tag.active{background:var(--primary-blue);color:#fff;border-color:var(--primary-blue)}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.5rem}.tool-card-wrapper{position:relative}.favorite-btn{position:absolute;top:1rem;right:1rem;z-index:10;background:#fff;border:2px solid var(--border-light);border-radius:var(--radius-sm);width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}.favorite-btn:hover{background:var(--accent-blue);border-color:var(--primary-blue);transform:scale(1.1)}.favorite-btn svg{width:18px;height:18px;color:var(--primary-blue)}.tool-card{display:block;padding:2rem;background:var(--bg-primary);border:1px solid var(--border-light);border-radius:var(--radius-lg);text-decoration:none;transition:all .3s;position:relative;overflow:hidden}.tool-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary-blue),var(--primary-light));transform:scaleX(0);transition:transform .3s}.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-xl);border-color:var(--primary-blue)}.tool-card:hover:before{transform:scaleX(1)}.tool-icon{font-size:2.5rem;margin-bottom:1rem;display:inline-block;animation:bounce 2s ease-in-out infinite}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.tool-card h3{font-size:1.25rem;font-weight:700;color:var(--text-primary);margin-bottom:.5rem}.tool-card p{color:var(--text-secondary);font-size:.925rem;line-height:1.5;margin-bottom:1rem}.tool-tag{display:inline-block;padding:.375rem .75rem;background:var(--accent-blue);color:var(--primary-blue);border-radius:var(--radius-sm);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.tool-tag.dev{background:#fef3c7;color:#f59e0b}footer{background:var(--bg-tertiary);padding:3rem 0;text-align:center;color:var(--text-secondary);border-top:1px solid var(--border-light)}[data-theme=dark]{--text-primary:#f1f5f9;--text-secondary:#94a3b8;--text-muted:#64748b;--bg-primary:#1e293b;--bg-secondary:#0f172a;--bg-tertiary:#334155;--border-light:#334155;--border-default:#475569;--accent-blue:rgba(0,102,255,.1)}[data-theme=dark] .navbar{background:rgba(30,41,59,.8)}[data-theme=dark] .tool-card{background:var(--bg-primary)}[data-theme=dark] .search-box input{background:var(--bg-primary);color:var(--text-primary)}@media (max-width:768px){.hero-title{font-size:2rem}.grid{grid-template-columns:1fr}.nav-menu{flex-direction:column;gap:.5rem}}.settings-modal{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:10000;opacity:0;visibility:hidden;transition:all .3s}.settings-modal.open{opacity:1;visibility:visible}.settings-content{background:var(--bg-primary);border-radius:var(--radius-lg);width:90%;max-width:500px;max-height:80vh;overflow-y:auto;transform:scale(.9);transition:transform .3s}.settings-modal.open .settings-content{transform:scale(1)}.settings-header{padding:1.5rem;border-bottom:1px solid var(--border-light);display:flex;justify-content:space-between;align-items:center}.settings-header h2{font-size:1.25rem;font-weight:700;color:var(--text-primary)}.close-btn{background:none;border:none;font-size:1.5rem;color:var(--text-secondary);cursor:pointer;padding:.5rem;border-radius:var(--radius-sm);transition:all .2s}.close-btn:hover{background:var(--bg-tertiary);color:var(--text-primary)}.settings-body{padding:1.5rem}.setting-item{margin-bottom:1.5rem}.setting-info{margin-bottom:.75rem}.setting-info label{display:block;font-weight:600;color:var(--text-primary);margin-bottom:.25rem}.setting-description{font-size:.875rem;color:var(--text-secondary)}.setting-control{width:100%;padding:.75rem;border:1px solid var(--border-light);border-radius:var(--radius-sm);background:var(--bg-primary);color:var(--text-primary);font-size:.925rem;transition:all .2s}.setting-control:focus{outline:none;border-color:var(--primary-blue);box-shadow:0 0 0 3px rgba(0,102,255,.1)}.tool-container{min-height:calc(100vh - 200px);padding:3rem 0}.tool-header{text-align:center;margin-bottom:3rem}.tool-header h1{font-size:2.5rem;font-weight:800;color:var(--text-primary);margin-bottom:.5rem}.tool-header p{color:var(--text-secondary);font-size:1.125rem}.tool-content{max-width:1000px;margin:0 auto;background:var(--bg-primary);border-radius:var(--radius-lg);padding:2rem;box-shadow:var(--shadow-lg)}.btn{padding:.75rem 1.5rem;border:none;border-radius:var(--radius-sm);font-weight:600;font-size:.925rem;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:.5rem}.btn-primary{background:var(--primary-blue);color:#fff}.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-md)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary)}.btn-secondary:hover{background:var(--border-light)}.form-group{margin-bottom:1.5rem}.form-label{display:block;font-weight:600;color:var(--text-primary);margin-bottom:.5rem}.form-input,.form-textarea{width:100%;padding:.75rem;border:1px solid var(--border-light);border-radius:var(--radius-sm);background:var(--bg-primary);color:var(--text-primary);font-size:.925rem;transition:all .2s}.form-input:focus,.form-textarea:focus{outline:none;border-color:var(--primary-blue);box-shadow:0 0 0 3px rgba(0,102,255,.1)}.form-textarea{resize:vertical;min-height:150px}