:root{--bg: #f9fafb;--bg-card: #ffffff;--text-main: #111827;--text-sub: #4b5563;--text-muted: #9ca3af;--border: #e5e7eb;--border-soft: #f3f4f6;--blue: #3b82f6;--blue-soft: #eff6ff;--green: #10b981;--red: #ef4444;--yellow: #f59e0b}*{box-sizing:border-box}html,body,#root{margin:0;padding:0;height:100%;font-family:Pretendard,Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;color:var(--text-main);background:var(--bg);-webkit-font-smoothing:antialiased}button{font-family:inherit}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px;background:linear-gradient(135deg,#f3f4f6,#e5e7eb)}.login-card{width:100%;max-width:400px;padding:32px;background:#fff;border-radius:12px;box-shadow:0 10px 25px #00000014}.login-logo{font-size:16px;font-weight:600;color:var(--text-sub);text-align:center;margin-bottom:4px}.login-title{font-size:22px;font-weight:700;text-align:center;margin:0 0 24px}.login-form .form-group{margin-bottom:14px}.login-form label{display:block;font-size:12px;font-weight:600;color:var(--text-sub);margin-bottom:4px}.login-form input{width:100%;padding:10px 12px;font-size:14px;border:1px solid var(--border);border-radius:6px;font-family:inherit}.login-form input:focus{outline:none;border-color:var(--blue)}.login-error{padding:8px 12px;background:#fef2f2;color:#991b1b;font-size:13px;border-radius:6px;margin-bottom:12px}.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 16px;font-size:14px;font-weight:600;border-radius:6px;border:none;cursor:pointer;font-family:inherit}.btn-primary{background:var(--blue);color:#fff}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.app-topbar{display:flex;align-items:center;padding:10px 20px;background:#fff;border-bottom:1px solid var(--border);height:48px;flex-shrink:0}.app-topbar .brand{font-size:14px;font-weight:700;color:var(--text-main);margin-right:24px}.app-topbar nav{display:flex;gap:16px;flex:1}.app-topbar nav a{font-size:13px;color:var(--text-sub);text-decoration:none}.app-topbar nav a.active,.app-topbar nav a:hover{color:var(--text-main)}.app-topbar .user{font-size:12px;color:var(--text-sub)}