:root{--bg: #0d1117;--bg-card: #161b22;--border: #30363d;--text: #c9d1d9;--text-strong: #f0f6fc;--muted: #8b949e;--accent: #58a6ff;--green: #3fb950;--red: #f85149}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{background:var(--bg);color:var(--text);font-family:Segoe UI,system-ui,-apple-system,sans-serif}input,select,button{font-family:inherit;font-size:14px}.app-shell{display:flex;min-height:100%}.sidebar{width:220px;background:var(--bg-card);border-right:1px solid var(--border);padding:16px}.sidebar h1{font-size:16px;color:var(--text-strong);margin-bottom:24px}.sidebar a{display:block;padding:8px 10px;border-radius:6px;color:var(--text);text-decoration:none;margin-bottom:4px;font-size:13px}.sidebar a.active,.sidebar a:hover{background:#58a6ff1f;color:var(--accent)}.content{flex:1;padding:24px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:10px;padding:20px}.btn{background:var(--accent);color:#fff;border:none;border-radius:6px;padding:8px 16px;cursor:pointer;font-weight:600}.btn:hover{opacity:.9}.input{width:100%;background:#0d1117;border:1px solid var(--border);border-radius:6px;padding:8px 10px;color:var(--text-strong);margin-bottom:12px}table{width:100%;border-collapse:collapse;font-size:13px}th{text-align:left;color:var(--muted);font-weight:500;padding:8px;border-bottom:1px solid var(--border)}td{padding:8px;border-bottom:1px solid var(--border)}.login-screen{display:flex;align-items:center;justify-content:center;height:100%}.login-box{width:320px}.error-text{color:var(--red);font-size:13px;margin-bottom:12px}