*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Noto Sans KR',sans-serif;background-color:#f5f5f5;display:flex;justify-content:center;align-items:center;min-height:100vh}.login-container{background:#fff;border-radius:12px;padding:40px;width:100%;max-width:400px;box-shadow:0 2px 12px rgba(0,0,0,.08)}.login-header{text-align:center;margin-bottom:32px}.login-title{font-size:24px;font-weight:700;color:#1a1a1a;margin-bottom:4px}.login-subtitle{font-size:14px;color:#888}.form-group{margin-bottom:16px}.form-label{display:block;font-size:14px;font-weight:500;color:#333;margin-bottom:6px}.form-input{width:100%;padding:10px 14px;border:1px solid #ddd;border-radius:8px;font-size:14px;outline:0;transition:border-color .2s}.form-input:focus{border-color:#6366f1}.btn-login{width:100%;padding:12px;background-color:#6366f1;color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer;margin-top:8px;transition:background-color .2s}.btn-login:hover{background-color:#4f46e5}.login-divider{text-align:center;margin:24px 0 16px;position:relative}.login-divider::before{content:'';position:absolute;top:50%;left:0;right:0;height:1px;background:#e5e5e5}.login-divider span{background:#fff;padding:0 12px;font-size:12px;color:#aaa;position:relative}.btn-dev-login{width:100%;padding:10px;background-color:#f5f5f5;color:#666;border:1px solid #ddd;border-radius:8px;font-size:13px;cursor:pointer;transition:background-color .2s}.btn-dev-login:hover{background-color:#eee}#alert-container{margin-bottom:16px}.alert{padding:10px 14px;border-radius:8px;font-size:13px;margin-bottom:8px}.alert-danger{background-color:#fef2f2;color:#dc2626;border:1px solid #fecaca}.alert-success{background-color:#f0fdf4;color:#16a34a;border:1px solid #bbf7d0}