body {
    background:
        radial-gradient(ellipse 1100px 700px at 12% 0%, rgba(0, 198, 255, 0.14) 0%, transparent 60%),
        radial-gradient(ellipse 900px 600px at 88% 18%, rgba(160, 107, 255, 0.10) 0%, transparent 60%),
        #07060a !important;
}
.login-container {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    margin-top: var(--fixed-header-h, 96px);
}
.login-box {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.025) 0%, rgba(255, 255, 255, 0.008) 100%);
    border: 1px solid rgba(0, 198, 255, 0.22);
    border-radius: 20px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 20px 80px rgba(0, 0, 0, 0.8);
    text-align: center;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    animation: box-fade 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
@keyframes box-fade {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.login-logo {
    font-family: 'Inter', 'Noto Sans KR', sans-serif;
    font-weight: 900;
    font-size: 1.6rem;
    color: #00c6ff;
    letter-spacing: 3px;
    margin-bottom: 8px;
    text-shadow: 0 0 20px rgba(0, 198, 255, 0.45);
}
.login-subtitle {
    font-family: 'Inter', 'Noto Sans KR', sans-serif;
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.45);
    letter-spacing: 1.5px;
    margin-bottom: 30px;
}
.form-control-sleek {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: #fff;
    padding: 12px 18px;
    font-size: 1rem;
    width: 100%;
    margin-bottom: 20px;
    transition: all 0.3s;
    outline: none;
}
.form-control-sleek:focus {
    border-color: #00c6ff;
    background: rgba(0, 198, 255, 0.05);
    box-shadow: 0 0 15px rgba(0, 198, 255, 0.2);
}
.btn-login-sleek {
    background: linear-gradient(135deg, #00c6ff, #0078ff);
    border: none;
    border-radius: 10px;
    color: #fff;
    font-weight: 900;
    letter-spacing: 1px;
    padding: 14px;
    width: 100%;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(0, 120, 255, 0.3);
}
.btn-login-sleek:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 120, 255, 0.5);
}
.error-msg {
    color: #ff4444;
    font-size: 0.8rem;
    margin-bottom: 15px;
    display: none;
}