:root{--bg: #0f172a;--panel: #1e293b;--panel-alt: #273449;--border: #334155;--text: #e2e8f0;--text-muted: #94a3b8;--primary: #2563eb;--primary-hover: #1d4ed8;--danger: #dc2626;--danger-hover: #b91c1c;--radius: 10px;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);min-height:100vh}button{font-family:inherit;cursor:pointer;border:none;border-radius:var(--radius);padding:10px 16px;font-size:14px;font-weight:600;transition:background .15s ease,opacity .15s ease}button:disabled{opacity:.45;cursor:not-allowed}input{font-family:inherit;font-size:14px;padding:10px 12px;border-radius:var(--radius);border:1px solid var(--border);background:var(--panel-alt);color:var(--text)}input:focus{outline:2px solid var(--primary);outline-offset:0}label{font-size:13px;color:var(--text-muted);font-weight:600}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:var(--danger-hover)}.btn-ghost{background:var(--panel-alt);color:var(--text);border:1px solid var(--border)}.btn-ghost:hover:not(:disabled){background:var(--border)}.login-wrapper{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.login-card{width:100%;max-width:380px;background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:32px}.login-card h1{margin:0 0 4px;font-size:22px}.login-card p.subtitle{margin:0 0 24px;color:var(--text-muted);font-size:14px}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}.error-box{background:#dc26261f;border:1px solid var(--danger);color:#fca5a5;border-radius:var(--radius);padding:10px 12px;font-size:13px;margin-bottom:16px}.app-header{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;background:var(--panel);border-bottom:1px solid var(--border)}.app-header h2{margin:0;font-size:18px}.app-main{max-width:900px;margin:0 auto;padding:24px}.toolbar{display:flex;flex-wrap:wrap;align-items:flex-end;gap:16px;background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:20px;margin-bottom:20px}.week-nav{display:flex;gap:8px}.week-nav button{min-width:44px}.output-panel{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:20px}.output-panel .range-display{font-size:24px;font-weight:700;letter-spacing:.01em;color:var(--text);margin:0 0 2px}.output-panel .status-line{color:var(--text-muted);font-size:13px;margin:0}.output-header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:12px}.output-meta{min-width:0}.copy-btn{flex-shrink:0;padding:8px 16px;font-size:13px;font-weight:600;border-radius:8px;background:var(--panel-alt);color:var(--text);border:1px solid var(--border)}.copy-btn:hover:not(:disabled){background:var(--border)}.output-textarea{width:100%;min-height:380px;resize:vertical;font-family:Cascadia Code,Consolas,Courier New,monospace;font-size:13px;line-height:1.55;color:var(--text);background:var(--panel-alt);border:1px solid var(--border);border-radius:var(--radius);padding:14px;white-space:pre;overflow:auto;scrollbar-width:thin;scrollbar-color:var(--border) transparent}.output-textarea::-webkit-scrollbar{width:12px;height:12px}.output-textarea::-webkit-scrollbar-track{background:transparent}.output-textarea::-webkit-scrollbar-thumb{background:var(--border);border-radius:8px;border:3px solid var(--panel-alt)}.output-textarea::-webkit-scrollbar-thumb:hover{background:#475569}