:root{--bg: #f8fafc;--bg-secondary: #ffffff;--text: #1e293b;--text-secondary: #64748b;--border: #e2e8f0;--primary: #3b82f6;--primary-hover: #2563eb;--error: #ef4444;--code-bg: #1e293b;--code-text: #e2e8f0}.dark{--bg: #0f172a;--bg-secondary: #1e293b;--text: #f1f5f9;--text-secondary: #94a3b8;--border: #334155;--code-bg: #0f172a;--code-text: #e2e8f0}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;min-height:100vh;-webkit-font-smoothing:antialiased}.container{max-width:1280px;margin:0 auto;padding:0 24px}.header{background:var(--bg-secondary);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.header-inner{display:flex;align-items:center;height:60px;max-width:1280px;margin:0 auto;padding:0 24px}.logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:20px;color:var(--text);text-decoration:none}.logo-icon{background:var(--primary);color:#fff;padding:4px 8px;border-radius:6px;font-family:JetBrains Mono,monospace;font-size:14px}.nav-links{display:flex;gap:4px;margin-left:32px;flex:1}.nav-link{padding:8px 16px;color:var(--text-secondary);text-decoration:none;font-size:14px;font-weight:500;border-radius:6px;transition:all .15s}.nav-link:hover{background:var(--bg);color:var(--text)}.nav-link.active{background:var(--primary);color:#fff}.main{padding:32px 0;min-height:calc(100vh - 120px)}.tool-header{margin-bottom:32px}.tool-title{font-size:32px;font-weight:700;margin-bottom:8px}.tool-desc{font-size:16px;color:var(--text-secondary)}.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:24px}@media(max-width:768px){.tool-grid{grid-template-columns:1fr}}.editor-panel{background:var(--bg-secondary);border:1px solid var(--border);border-radius:8px;padding:16px}.editor-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.editor-label{font-size:14px;font-weight:600;color:var(--text-secondary)}.editor{width:100%;min-height:400px;padding:12px;border:1px solid var(--border);border-radius:6px;font-family:JetBrains Mono,monospace;font-size:13px;background:var(--bg);color:var(--text);resize:vertical}.editor:focus{outline:none;border-color:var(--primary)}.editor.output{background:var(--code-bg);color:var(--code-text)}.error{background:#fee2e2;color:var(--error);padding:12px;border-radius:6px;margin-bottom:12px;font-size:13px;font-family:JetBrains Mono,monospace}.dark .error{background:#7f1d1d}.tool-actions{display:flex;gap:12px;flex-wrap:wrap}.btn-primary{padding:12px 24px;background:var(--primary);color:#fff;border:none;border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;transition:background .15s}.btn-primary:hover{background:var(--primary-hover)}.btn-secondary{padding:12px 24px;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;transition:background .15s}.btn-secondary:hover{background:var(--bg-secondary)}.btn-small{padding:4px 12px;background:var(--bg);color:var(--text-secondary);border:1px solid var(--border);border-radius:4px;font-size:12px;font-weight:500;cursor:pointer}.btn-dark{padding:8px;background:none;border:none;font-size:20px;cursor:pointer}.lang-select{padding:8px 12px;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;margin-right:8px}.select{padding:8px 12px;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:4px;font-size:14px;cursor:pointer}.input-text{width:100%;padding:12px;border:1px solid var(--border);border-radius:6px;font-family:JetBrains Mono,monospace;font-size:14px;background:var(--bg);color:var(--text)}.input-text.output{background:var(--code-bg);color:var(--code-text)}.current-ts{background:var(--bg-secondary);border:1px solid var(--primary);padding:16px 24px;border-radius:8px;margin-bottom:24px;display:flex;align-items:center;gap:12px}.ts-value{font-family:JetBrains Mono,monospace;font-size:24px;font-weight:700;color:var(--primary)}.coming-soon{background:var(--bg-secondary);border:1px dashed var(--border);padding:48px;border-radius:8px;text-align:center;color:var(--text-secondary)}.footer{background:var(--bg-secondary);border-top:1px solid var(--border);padding:24px 0;text-align:center;color:var(--text-secondary);font-size:14px}.hidden{display:none!important}.home-hero{text-align:center;padding:48px 0 32px}.home-title{font-size:48px;font-weight:800;margin-bottom:16px}.home-desc{font-size:18px;color:var(--text-secondary);max-width:600px;margin:0 auto}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;padding:24px 0}.tool-card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:12px;padding:24px;text-decoration:none;transition:all .2s}.tool-card:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 4px 12px #3b82f61a}.tool-card-icon{width:48px;height:48px;background:var(--primary);color:#fff;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;margin-bottom:16px;font-family:JetBrains Mono,monospace}.tool-card-title{font-size:18px;font-weight:600;color:var(--text);margin-bottom:8px}.tool-card-desc{font-size:14px;color:var(--text-secondary);line-height:1.4}.diff-output{background:var(--code-bg);border:1px solid var(--border);border-radius:6px;padding:12px;font-family:JetBrains Mono,monospace;font-size:13px;overflow:auto}.diff-line{padding:2px 8px;line-height:1.5;white-space:pre-wrap;word-break:break-all}.diff-added{background:#22c55e33;color:#22c55e}.diff-removed{background:#ef444433;color:#ef4444}.diff-same{color:var(--text-secondary)}