*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root,[data-theme=light]{--bg:#eef2ff;--surface:#fff;--border:#dde3f3;--text:#1a2340;--muted:#6b7a9e;--subtle:#89c;--nav-bg:#1a2340;--nav-text:#89c;--nav-text-active:#fff;--accent-start:#4f9cf9;--accent-end:#7c3aed;--accent:#4f9cf9;--green:#10b981;--yellow:#f59e0b;--purple:#7c3aed;--red:#ef4444;--shadow:0 2px 8px #1a23400f}[data-theme=dark]{--bg:#0d1117;--surface:#161b27;--border:#1e2a40;--text:#e2e8f0;--muted:#6b7a9e;--subtle:#4a5670;--nav-bg:#080c14;--nav-text:#4a5670;--nav-text-active:#fff;--shadow:0 2px 8px #0000004d}body{background:var(--bg);color:var(--text);font-family:DM Sans,-apple-system,BlinkMacSystemFont,sans-serif;font-size:14px;line-height:1.5;transition:background .2s,color .2s}a{color:inherit;text-decoration:none}button{cursor:pointer;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:8px;padding:8px 16px;font-family:DM Sans,sans-serif;font-size:14px;transition:opacity .15s}button.primary{background:linear-gradient(135deg, var(--accent-start), var(--accent-end));color:#fff;border-color:#0000;box-shadow:0 2px 8px #4f9cf940}button.primary:hover{opacity:.9}button:disabled{opacity:.5;cursor:not-allowed}input,select,textarea{border:1px solid var(--border);background:var(--bg);width:100%;color:var(--text);border-radius:8px;padding:9px 12px;font-family:DM Sans,sans-serif;font-size:14px}input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:1px}label{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:5px;font-size:11px;font-weight:600;display:block}.card{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:12px;padding:16px}.page{max-width:1100px;margin:0 auto;padding:24px 28px}.form-group{margin-bottom:16px}.error{color:var(--red);margin-top:4px;font-size:13px}