body {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px 16px;
}

.login-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 440px;
    padding: 48px;
    border-radius: 28px;
    border: 1px solid rgba(226, 232, 240, 0.92);
    background: rgba(255, 255, 255, 0.97);
    box-shadow: 0 28px 56px rgba(15, 23, 42, 0.16);
    backdrop-filter: blur(16px);
}

.login-header {
    margin-bottom: 30px;
    text-align: center;
}

.login-header .logo {
    margin-bottom: 16px;
}

.login-header .logo img {
    width: 64px;
    height: 64px;
    object-fit: contain;
    display: inline-block;
}

.login-header h1 {
    margin-bottom: 8px;
    font-size: 1.55rem;
    font-weight: 800;
    color: #0f172a;
}

.login-header p {
    margin-bottom: 0;
    color: #64748b;
    font-size: 0.95rem;
    line-height: 1.7;
}

.login-card .form-label {
    font-weight: 600;
    color: #334155;
}

.login-card .form-control,
.login-card .input-group-text {
    min-height: 50px;
    border-color: #dbe3ef;
}

.login-card .input-group-text {
    background: #f8fafc;
    color: #64748b;
}

.login-card .form-control:focus {
    border-color: #60a5fa;
    box-shadow: 0 0 0 0.25rem rgba(37, 99, 235, 0.12);
}

.login-card .btn-primary {
    width: 100%;
    min-height: 50px;
    border-radius: 14px;
    font-weight: 700;
}

.login-card .alert {
    border-radius: 16px;
}

@media (max-width: 576px) {
    .login-card {
        padding: 28px 22px;
        border-radius: 24px;
    }
}