:root{--bg:#0b1220;--panel:#131c2e;--panel2:#1a2540;--text:#e8edf7;--muted:#8a99b8;--accent:#4f8cff;--accent2:#2bd4a0;--danger:#ff6b6b;--border:#243049;--radius:12px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.auth-card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:32px;width:100%;max-width:400px}.auth-card h1{margin:0 0 4px;font-size:22px}.auth-card .sub{color:var(--muted);margin:0 0 24px;font-size:14px}.field{margin-bottom:16px}.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}.field input,.field select{width:100%;padding:10px 12px;background:var(--panel2);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:15px}.field input:focus,.field select:focus{outline:none;border-color:var(--accent)}.btn{width:100%;padding:12px;border:none;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;background:var(--accent);color:#fff;transition:opacity .15s}.btn:hover{opacity:.9}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.secondary{background:var(--panel2);border:1px solid var(--border)}.err{background:hsla(0,100%,71%,.12);color:var(--danger);padding:10px 12px;border-radius:8px;margin-bottom:16px}.err,.foot{font-size:14px}.foot{margin-top:18px;text-align:center;color:var(--muted)}.shell{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--panel);border-right:1px solid var(--border);padding:20px 16px}.sidebar .brand{font-weight:700;font-size:16px;margin-bottom:24px}.sidebar a{display:block;color:var(--muted);padding:10px 12px;border-radius:8px;margin-bottom:4px;font-size:14px}.sidebar a:hover{background:var(--panel2);text-decoration:none;color:var(--text)}.sidebar a.active{background:var(--accent);color:#fff}.main{flex:1 1;padding:32px}.main h2{margin:0 0 8px}.placeholder{margin-top:24px;background:var(--panel);border:1px dashed var(--border);border-radius:var(--radius);padding:40px;text-align:center;color:var(--muted)}